NetScaler 10.5 (Main) Release Notes

The issues addressed in Build 52.11.

AAA-TM

If the hostname that sends an incoming request does not match the domain configured on the authentication virtual server, the NetScaler ADC returns an HTTP 500 error. As a workaround, configure an authentication profile and include the hostname.
[From Build 52.11] [#488015]

When AAA is configured to authenticate users to a Microsoft Sharepoint 2013 server by using NTLM, the user might be prompted to retype his or her credentials even though the user entered those credentials correctly. After the user retypes the credentials, he or she is logged on successfully. The issue is that initially the NetScaler ADC sends an incorrect domain to Sharepoint.
[From Build 52.11] [#476885]

AAA now supports SAML HTTP Redirect bindings. These bindings include an HTTP Refresh command and target URL as a base64-encoded SAMLResponse query string parameter in a SAML HTTP GET response.
[From Build 52.11] [#482174]

In forms-based single sign-on (SSO), if the designated response size is 0, the NetScaler ADC does not search for the complete response, as it normally would for responses with sizes above 0. It therefore fails to find the login form, and forms-based SSO authentication fails.
[From Build 52.11] [#493308]

The AAA-TM SAML service provider (SP) now includes a parameter indicating the trust level assigned to a user authentication request in SAML redirects to the identity provider (IDP). This information enables the IDP to request appropriate authentication credentials.
[From Build 52.11] [#484933]

Occasionally a AAA-TM session on one core of an nCore or cluster ADC is not duplicated to other cores. When this condition occurs, counters do not include the session, which causes monitoring and statistics displays to show incorrect information.
[From Build 52.11] [#480298]

The NetScaler SAML service provider (SP) feature now supports SiteMinder.
[From Build 52.11] [#488077]

The NetScaler ADC no longer sets the NSC_TMAA session cookie during a secure load balancing virtual server session.
[From Build 52.11] [#474918, #502915]

Application Firewall

If the application firewall receives a multipart POST request with a Content-Type header that contains a charset, it blocks that request as malformed.
[From Build 52.11] [#464641]

The application firewall parses multipart forms correctly according to the appropriate RFC.
[From Build 52.11] [#479840, #472476, #482042]

If you use the configuration utility to make changes to the HTML Cross-Site Scripting check, Allowed/Denied patterns, the application firewall becomes unresponsive after the first POST request it receives after you save your changes. (The Allowed/Denied patterns are accessed through the Modify Signature dialog box.) If you use the command line to make the same changes, no problems occur.
[From Build 52.11] [#459031, #463351]

CloudBridge Connector

Traffic latency might be greater than 100 milliseconds in a CloudBridge connector tunnel between two NetScaler appliances.
[From Build 52.11] [#498541]

Command Line Interface

The rbaOnResponse system parameter fails to work after you upgrade NetScaler ADC nCore or nCore VPX from version 9.3 to 10.x.
[From Build 52.11] [#480639]

Configuration Utility

After installing Java, if you disable Java on the Java Control Panel, the graphical user interface (GUI) applet remains blank.
Workaround: Be sure to enable Java on the control panel.
[From Build 52.11] [#460020]

A NetScaler ADC displays a Java error if you access it by using an sshd connection.
[From Build 52.11] [#451546]

To display the newly added HTML imports, you have to refresh the page on the browser.
[From Build 52.11] [#441408]

The configuration utility displays the "Resource already exists" error if you configure a content switching virtual server with the IP address 10.69.129.128.
[From Build 52.11] [#490142]

The default value for packet count is 45, and the default Encryption Trigger Timeout is 1 ms, but the configuration utility displays both values, incorrectly, as 0.
[From Build 52.11] [#494915]

If you have configured Mobile Device Manager by using the XenMobile wizard in release 10.1.e build, and then upgraded to release 10.5, the service configuration does not appear in the configuration utility.
Workaround: Rename the two MDM virtual servers by adding "_MDM_" at the beginning. For example, rename _XM_ABC_192.168.1.1_443 to _XM_MDM_ABC_192.168.1.1_443.
[From Build 52.11] [#493946]

The configuration utility might display an error message while adding IPv6 routes in non-default traffic domains.
[From Build 52.11] [#499592]

DNS

If the number of records in a DNS response for a domain exceeds the Netscaler ADC limit, or if one of the records in the response contains invalid data, the NetScaler ADC does not cache the response. As a result, DNS resolution using NetScaler nameserver entities fails.
[From Build 52.11] [#437529]

If a server sends a NODATA response that has CNAME record in the answer section and no records in the authoritative and additional sections, the response is marked for CNAME caching on the NetScaler ADC, because it is incorrectly assumed to be a referral response. As a result, the ADC sends a blank response to subsequent queries, of any query type, for the canonical name.
[From Build 52.11] [#477552]

The DNS cache entries are not flushed if the DNS caching feature has been disabled for approximately 250 days.
[From Build 52.11] [#471707]

GSLB

In rare cases, high management-CPU usage occurs and a large number of error messages appear in the log file. As a result, queries to the location database might fail, and the backup load balancing method is used for site load balancing.
[From Build 52.11] [#453144, #455417]

Integrated Caching

When a byte-range request is sent for an object, and if that object is expired, a request is sent to the server to revalidate the object. If that object is now modified on the server, the full response is served to the NetScaler. In such a scenario, the NetScaler appliance can crash.
[From Build 52.11] [#494910, #497793]

Load Balancing

If a client connection is in the CLOSE_WAIT state, the NetScaler ADC does not send PUSH notifications to the client. However, it reports success to the PUSH server.
[From Build 52.11] [#489197]

If you have configured the RADIUS PI expression CLIENT.UDP.RADIUS.ATTR_TYPE(<avp code>) for content switching, rule-based persistency, or the token load balancing method, and you typecast the result of this expression to an integer or IP address by using the expression TYPECAST_NUM_AT / TYPECAST_IP_ADDRESS_AT, the typecast operation fails.
[From Build 52.11] [#482113]

NetScaler Gateway

Showing active user sessions in the configuration utility or by using the command line might result in high CPU utilization on NetScaler Gateway.
[From Build 52.11] [#502043, #498827, #501431]

If you configure SAML authentication with signed SAML assertions, if the user connection disconnects before the SAML response is normalized, NetScaler Gateway fails.
[From Build 52.11] [#489609]

If user names contain a period (.) that have a common prefix before the period, NetScaler Gateway creates cache files based on the prefix. When this occurs, tickets for one user are sent to a different user.
[From Build 52.11] [#494463]

When users connect with clientless access, the appliance fails if the last octet of the IP address of the server in the internal network is equal to or greater than 240.
[From Build 52.11] [#494605]

If you configure endpoint analysis policies, if the session times out and users do not close the web browser, they cannot log on again.
[From Build 52.11] [#459149]

On Windows-based devices, there are two new registry entries for NetScaler Gateway that override Citrix Receiver for Windows behavior. The new registry entries specify the following:
- Enable or disable client cleanup on the user device when Receiver is also running.
- Show or hide the NetScaler Gateway Plug-in icon even if it is integrated with Receiver.
To enable client cleanup:
Note: Enable client cleanup on NetScaler Gateway and then set the registry entry on the user device.
HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\Secure Access Client
Name: AllowCleanup
Type: REG_DWORD
Data: 1
To show the NetScaler Gateway Plug-in icon:
HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\Secure Access Client
Name: DisableIconHide
Type: REG_DWORD
Data: 1
[From Build 52.11] [#406312]

NetScaler Insight Center

In a multi-stream ICA connection consisting of one primary TCP connection and three secondary TCP connections, the NetScaler ADC fails to export the ICA Appflow records for the secondary connections.
[From Build 52.11] [#463043]

NetScaler Insight Center does not display reports for traffic that passes through any NetScaler virtual servers other than HTTP virtual servers.
[From Build 52.11] [#498430]

A NetScaler Insight Center report that displays the launch duration value display multiple rows for the same application
[From Build 52.11] [#473936, #473967]

The following error might occur if you open the dashboard on the NetScaler Insight Center graphical user interface by using Internet Explorer 8:
Error fetching licensing information.
For more information about browser support, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-access-ni-con.html.
[From Build 52.11] [#496805]

NetScaler SDX Appliance

If you are modifying an existing NetScaler instance by removing a previously configured interface from the table and again add the same interface, it throws and error.
[From Build 52.11] [#477826]

On a SDX-VPX, for a management interface, when HA Monitoring or another property in interface is changed via GUI, It throws "operation not permitted" error.
[From Build 52.11] [#495067]

If you create channels on SDX and use these channels in VPXs and then take a backup of the appliance to restore either the complete appliance or selected instances, then channels are not restored and instances may fail.
[From Build 52.11] [#432899, #435206]

In case of shared management of CPU in SDX, licenses fail to load on start-up sometimes if the management CPU is overloaded.
[From Build 52.11] [#473681]

Issue: The backup file contains more NetScaler instance than allowed instance in the license applied. Now instance restore for a single NetScaler fails with error message "License does not allow more than x NetScaler instance".
Fix: For instance restore operation, licence validation is done against no of NetScaler selected for restore instead of validating against all NetScaler instance in the backup files.
[From Build 52.11] [#498440]

Networking

The NetScaler ADC might fail to evaluate listen policies, containing source or destination ipv6 address/subnet, for certain IPv6 addresses.
[From Build 52.11] [#496564]

With more than 1000 IP tunnels configured on a NetScaler ADC, the internal data structure for these IP tunnels might not be updated for some events. This changes the status of these IP tunnels to the DOWN state.
[From Build 52.11] [#491473]

The NetScaler ADC drops IPv4 packets related to the following protocols:
- IPv6 encapsulation (41)
- Fragment Header for IPv6 (44)
- ICMP for IPv6 (58)
[From Build 52.11] [#490190]

In a CloudBridge connector tunnel, IKED packets might get routed back to the same NetScaler ADC instead of the peer tunnel end point.
[From Build 52.11] [#494875, #498447]

Old or stale OSPF LSAs might exist after a warm restart, or restart after a power failure, resulting in triple flip.
[From Build 52.11] [#441005]

On a NetScaler ADC, ND6 entries might get in INCOMPLETE state due to synchronization mismatch among different internal modules. As a result NetScaler fails to serve traffic for that IPV6 address.
[From Build 52.11] [#480100, #483728]

In a high availability (HA) configuration, VLAN Interface binding configuration might be lost when continuous HA failover happens.
[From Build 52.11] [#477415]

In a high availability (HA) configuration, VMAC configuration might be lost when continuous HA failover happens.
[From Build 52.11] [#477402]

Feature: Load Balancing
For a DHCP load balancing configuration, the NetScaler ADC does not forward any unicast DHCP relay agent (UDP port 67) packets, which are received by the virtual server, to the bound servers.
[From Build 52.11] [#497057]

Policies

Using the "SYS.CHECK_LIMIT” expression in conjunction with any boolean expression can cause the NetScaler to crash.
[From Build 52.11] [#493045]

SSL

On all the NetScaler MPX platforms, DH cryptographic operation is now offloaded to the hardware, reducing the load on the CPU. If your deployment uses DH crypto operations heavily, you will notice a performance improvement.
[From Build 52.11] [#490273, #378182, #404081]

System

When an interface of a static channel becomes inactive because of an MTU mismatch, the peer device of the channel still sends traffic to that interface.
[From Build 52.11] [#463571]

When the Call Home feature is disabled before the Call Home enable operation is successful, a second instance of the Call Home process starts to run. This results in high usage of the management CPU.
[From Build 52.11] [#498232]

With AppFlow enabled, if any of the HTTP headers (URL, Host, Cookie, and so on) have a length of exactly 255, the NetScaler appliance could crash.
[From Build 52.11] [#496726, #495235, #496997, #497181, #499667, #499733, #505523]

The NetScaler appliance can crash when a large HTTP request URL has a space in it and if the request is broken into multiple packets.
[From Build 52.11] [#497321, #501856, #502116, #502902]

When the NetScaler deployment has large configuration size, the NetScaler appliance can crash due to issues with memory allocation.
[From Build 52.11] [#478608]

A new HTTP profile option "rtspTunnel" allows RTSP over HTTP. The RTSP tunnel is detected by the presence of either one of the following
- 'Accept: application/x-rtsp-tunnelled' request header
- 'Content-Type: application/x-rtsp-tunnelled' response header
Once the tunnel is detected, NetScaler stops HTTP tracking for that TCP connection and lets the RTSP flow go through. The "rtspTunnel" option is disabled by default.
[From Build 52.11] [#480219]

Changes made to the time zone are not reflected till the NetScaler appliance is warm rebooted.
[From Build 52.11] [#471100, #425465, #484159, #484187]

If you change the IP address of a load balancing virtual server that shares the same server information (IP address, port and service) with an audit server and then clear the configurations, the NetScaler is expected to remove the virtual server, the audit server, and other NetScaler configurations. However, when you now add the virtual server with the original server details, the NetScaler throws an error message that says "resource already exists".
Note: In a HA setup, this behavior is displayed even when you perform a force sync or a force failover operation.
[From Build 52.11] [#484527]

When trying to log on to the NetScaler using the GUI or the NITRO API, external users (from LDAP, TACACS, and so on) get the following error message: 'User does not exist'.
[From Build 52.11] [#498221, #501681]

The NetScaler randomly crashes when SPDY is enabled on a NetScaler deployment which has integrated caching enabled. This occurs due to some interaction issues.
[From Build 52.11] [#487437, #494371]

The NetScaler intermittently fails to generate traps due to issues in propagating the alarm state to the SNMP daemon.
[From Build 52.11] [#490192]

XML

Users who access a Microsoft Sharepoint server through a NetScaler ADC that has the application firewall enabled are unable to open any document type that requires software that is not part of the browser, such as Microsoft Office files.
[From Build 52.11] [#450232]

The known issues present in Build 52.11.

AAA-TM

In the configuration utility, when you filter out specific IPs and IP ranges specified as IP/netmask, the sessions are not filtered out. All sessions still appear on the list. When you filter out sessions by AAA user or AAA group, those sessions are filtered out and the list appears as it should.
[From Build 50.10] [#446755, #468475]

When AAA-TM logs users off after their sessions time out, the traffic management session associated with the user is not terminated. If the number of abandoned traffic management sessions exceeds internal limits, the NetScaler ADC might become unresponsive.
[From Build 52.11] [#481876]

The NetScaler ADC AAA-TM user interface has a timeout of 20 seconds. When authenticating to an external authentication server, if authentication takes more than 20 seconds, the following message appears in the logs: "libaaa recv failed". This message does not indicate that authentication failed or any other problem that affects users, and can safely be ignored.
[From Build 52.11] [#437454]

The NetScaler AAA SAML service provider (SP) does not send a SAML logout message to the SAML identity provider (IdP), so users who log onto SAML are unable to log off.
[From Build 52.11] [#501565]

If AAA-TM is configured to use NTLM authentication, either by itself or as fallback when Kerberos is not available, the NetScaler ADC might become unresponsive when a user attempts to authenticate through NTLM.
[From Build 52.11] [#492626]

Action Analytics

The NetScaler crashes due to an issue in hash calculation and comparison of the action analytics records. The crash is observed when the NetScaler receives URLs that differ only in case.
Examples:
http://10.217.6.239/TesT/
http://10.217.6.239/TEST/
http://10.217.6.239/TEsT/
http://10.217.6.239/TeST/
Note post fix:
Stream analytics record creation will be case sensitive. For example, WWW.GOOGLE.COM and www.google.com will result in two seperate records.
If this is not desired, stream selector results should be converted to one case. Example:
add stream selector sel1 HTTP.REQ.hostname.to_lower
[From Build 52.11] [#406457]

AppExpert

Creating an AppExpert application with the name 'ns' (uppercase or lowercase) results in conflicts and therefore the creation of a content switching policy fails.
Workaround: Do not create AppExpert applications with name 'ns' (uppercase or lowercase).
[From Build 50.10] [#483427]

AppFlow

If you delete an appflow action, the NetScaler ADC might fail.
[From Build 52.11] [#499172, #501216]

The following behavior is seen during a high availability failover on a NetScaler appliance that has active ICA session applications launched:
- The applications stop functioning, but are visible on the browser.
- The Citrix Receiver displays a dialog box, with a message stating that the connection is disconnected.
- When you click OK on the dialog box, the applications are not displayed anymore.
- If you launch any fresh applications without re-login, all the previously launched applications will resume with the previous status.
[From Build 50.10] [#388563, #438710, #488206]

Application Firewall

Signature Bindings Not Shown in PCI-DSS Report
The Application Firewall PCI-DSS report does not display signature bindings. The Profile Settings section of the report shows bound signatures as "not set".
[From Build 51.10] [#443673]

A NetScaler ADC that has the application firewall feature enabled might reset the connection after a protected web server issues an HTTP 204 response.
[From Build 51.10] [#427798]

The application firewall PCI-DSS report does not contain information on the "SQLInjectionCheckSQLWildChars" parameter.
[From Build 50.10] [#423150]

When a user attempts to upload a file to a server that is protected by the application firewall, the file upload fails. The underlying cause is that the application firewall included an invalid character in the MIME boundary when encoding the file.
[From Build 51.10] [#472476, #418036]

If the application firewall blocks a request because of a limiting policy, such as a maximum upload size limit on a web form, the blocking action is not logged. If a custom redirect page has been configured for that web page, the application firewall does not display it.
[From Build 51.10] [#466329]

If a user request triggers an application firewall policy that is bound to the APPFW_BYPASS profile, the application firewall might fail to generate an SNMP alarm.
[From Build 51.10] [#489691]

On a NetScaler ADC that has the application firewall enabled and the buffer overflow check configured to block, the following error message might appear in th elogs: "Internal error: additional data generated after partial response <blocked>". This error message indicates that a partial response was sent before the remainder of the response was blocked.
[From Build 52.11] [#498912]

In the NetScaler configuration utility, when you approve Form Field Consistency check learned relaxations, you must close and then reopen the Modify Form Field Consistency Check dialog box before the new relaxations appear in the list.
[From Build 50.10] [#457954]

If the user sends a request that contains the string "Javascript" without a non-alphanumeric delimeter, the Cross-Site Scripting check does not block the request. This is expected behavior. Without a delimiter, the keyword "Javascript" cannot trigger code execution and therefore poses no threat to the protected web application.
[From Build 52.11] [#457926]

The General tab on the Modify Field Format Check dialog box is not functional. To work around this issue, you can enable or disable the action items (block, learn, log, stats) in the Application Firewall Wizard, or by using the NetScaler command line.
[From Build 50.10] [#445931]

Cache Redirection

In the event of a cache miss, the request is sent as an SSL request instead of an HTTP request to the origin server even though the backendssl parameter is disabled on the NetScaler ADC.
[From Build 50.10] [#442353]

CloudBridge

Issue ID 0440208: If a new SSL certificate, which requires a key, is installed without the key, access to management service GUI is lost.
[From Build 51.10] [#440208]

CloudBridge Connector

When the state of a cloudbridge connector tunnel is DOWN, there is a delay in displaying the related log messages (from the /tmp/iked.debug file) on the Create CloudBridge Connector page of the configuration utility.
[From Build 51.10] [#440781]

CloudPlatform

The NetScaler 10.5 release does not support Citrix CloudPlatform.
[From Build 50.10] [#447834]

Cluster

In a NetScaler cluster, UDP fragments from the server are not bridged to the client in case of ANY * virtual servers.
[From Build 50.10] [#480324]

Configuration Utility

In some cases, while binding an entity, such as a service or a certificate, if you unbind another entity from the list, the list is refreshed and the entities that you selected for binding are no longer displayed. Therefore, you must again select the entities that you want to bind.
Workaround: Bind and unbind entries in separate operations.
[From Build 50.10] [#459906, #485041]

If a policy is bound or unbound from system global or the priority of the policy is modified, the changes are not reflected automatically. To see the current status, click the "Refresh" icon at the top right corner of the policy view. After refreshing the view, the policies display their bound status as well as the priorities.
[From Build 50.10] [#452669, #391434, #453555, #453597, #478131, #479434, #481397, #502720]

The Traffic Management > Load Balancing > Set up NetScaler for XenApp/XenDesktop wizard displays an error if more than one service group is bound to the virtual server that is used for load balancing the XenApp/XenDesktop servers, or if more than one service is bound to the service group.
[From Build 51.10] [#414807]

The new editor for classic policies has the following limitations:
- The option to modify an expression is not intuitive.
- The options to match any expression, match all expressions, and tabular form are not provided.
- The option to remove individual expressions within a compound expression is not provided.
- Named expressions are not classified and displayed.
- Named expressions cannot be previewed.
- The add or remove bracket buttons are not provided.
[From Build 50.10] [#480536]

If, in the NetScaler configuration utility, after navigating to AppExpert > Responder> Policies and click “Hide built-in responder policies“ or “Show built-in responder policies,” the page does not immediately refresh, and continuous clicking prevents the page from refreshing.
Workaround: If you click multiple times, allow some time to pass between each click.
[From Build 52.11] [#496336]

You cannot use the configuration utility to add signatures to an existing application firewall policy.
Workaround: Use the command line interface .
[From Build 51.10] [#470941]

You cannot install a server, client, or intermediate certificate with a FIPS key by using the configuration utility.
Workaround: Use the FIPS wizard to create and install the certificate.
[From Build 50.10] [#485942]

After the first reboot of a cluster setup that has large configurations, the NetScaler ADC takes more time to load these configurations and to allow you to logon.
[From Build 50.10] [#483442]

For integrated caching, the details of a cache object are not available in the configuration utility. However, the list of cached objects is available.
Workaround: Use the CLI command to view the details of a cache object.
[From Build 50.10] [#457623]

The IP Bindings tab on the Create VLAN and Configure VLAN pages does not display IP addresses that are in the same subnet as the management IP (NSIP) address.
[From Build 50.10] [#456428]

If you are binding classic policies, set empty values for the "Gotoexpression" and "Invoke" columns as these parameters are not applicable for classic policies.
[From Build 50.10] [#454246, #478532]

If you use the MAC Safari browser to upgrade a NetScaler ADC and, in the upgrade wizard, you click the browse button to choose a build file on the appliance, the dialog box does not shown any files or folders. If you navigate back to the root folder, the dialog box displays the top level folder, but you cannot browse the files in the folder.
Workaround: Click the Settings icon and navigate to Preferences > Security > Manage Website Settings > Java, and then change the When visiting other websites setting to Run in unsafe mode.
[From Build 50.10] [#466245, #475388]

The graphical user interface (GUI) does not display the following search fields on the Cache Objects page:
* HTTP Status Code
* Ignore Marker Objects
* Include-Not Ready Object
[From Build 50.10] [#447915]

If a NetScaler connection from a client is closed without the client logging out, the session created for that connection remains active until the configured timeout period elapses. If this happens frequently, after about the 20th occurrence the user might get a "Connection limit to CFE exceeded" error message.
[From Build 51.10] [#375277, #322602, #334465, #396405, #412455, #419503, #438382, #438534, #438796, #441853, #446387, #448361]

If you use a Chrome browser to access the NetScaler graphical user interface (GUI), the browser might display the Page Unresponsive error message.
Workaround:
If you are using a Windows computer, do the following:
1. Right-click the shortcut icon that you use to open the Chrome browser, and select Properties from the pop-up menu.
2. In the Google Chrome Properties dialog box, click the Shortcut tab and, in the Target field, append the following value:
--disable-hang-monitor
For example: "C:Program Files (x86)GoogleChromeApplicationchrome.exe --disable-hang-monitor" http://www.google.com
3. Close all instances of the Chrome browser, and restart the Chrome browser.
If you are using a MAC computer, do the following:
1. Open the terminal.
2. Launch the Chrome browser from the terminal and append the --disable-hang-monitor value, as follows:
open -a /Applications/Google Chrome.app --args --disable-hang-monitor
[From Build 52.11] [#400073, #401262]

You cannot create load balancing virtual servers or NetScaler Gateway virtual servers with the same name pattern used for virtual servers created in the XenMobile wizards.
[From Build 50.10] [#485698]

When using the expression editor to modify an existing expression, select the expression and click Expression Editor. Alternatively, you can modify the expression directly in the text field.
[From Build 50.10] [#483421]

If you create a load balancing virtual server with a name matching the pattern "_XM_LB_MDM", the XenMobile dashboard might display incorrect port values.
[From Build 51.10] [#486590]

The key filename property of Import FIPS key (Configuration > Traffic Management > SSL > FIPS > FIPS keys >Action > Import > Key Filename) fails if you provide an incomplete filepath, folder1/folder2/rsa.key, where folder1 and folder2 are the folders within the nsconfig/ssl path.
Workaround: In release 10.1, provide only the FIPS key.
In release 10.5, you must specify the complete file path to the FIPS key.
[From Build 51.10] [#483226]

DNS

If, while adding a DNS record (such as addrec and nsrec) from the GUI or by using the NITRO API, you specify the TTL value as 3600, the value of the minimum TTL of the SOA record is used instead.
Workaround: Use the corresponding CLI command to add the DNS record.
[From Build 51.10] [#382478]

When a NetScaler ADC is deployed as a DNS server with caching enabled, and "flush dns proxyRecords" is used when the ADC is serving a large volume of traffic and has a large number of records in its cache, the ADC might fail.
[From Build 51.10] [#484069]

Front End Optimization

Some websites might not be able to render the page if the AppFlow clientSideMeasurements parameter is enabled along with some front end optimization actions.
[From Build 50.10] [#475535]

GSLB

Configuring a hash based backup load balancing method on a GSLB vserver might cause the NetScaler to fail if traffic triggers the backup method.
[From Build 52.11] [#496676]

If you change the GSLB configuration while the GSLB feature is disabled, the NetScaler ADC might process some stale messages when you enable the feature. As a result, the ADC might dump core and restart.
[From Build 51.10] [#485811]

High Availability

When upgrading HA nodes that have Web Interface on NetScaler (WIonNS) to build 126.x, the updates made in the Webinterface.conf file are over-written by the previous version of the file. This is due to the rolling upgrade of HA nodes or due to the file sync operation between HA nodes.
To avoid this issue, use the following steps when upgrading the HA nodes:
1. Before upgrading, run the command: "set ns param -internaluserlogin DISABLED"
2. Upgrade the secondary HA node to NetScaler 10.1 Build 126.x release.
3. Force failover to make the upgraded node as the primary node.
4. Upgrade the other HA node to NetScaler 10.1 Build 126.x release.
5. Restore the previously disabled "internaluserlogin" parameter to enabled using the command: "set ns param -internaluserlogin ENABLED".
6. Save the configurations.
Note: Before upgrade sync files between the HA nodes by using CLI command: "sync ha files all".
[From Build 51.10] [#471294]

Integrated Caching

When a selector-based content group has been configured, the NetScaler ADC can fail when a policy associated with this content group is matched and the response status is "404 Not Found".
[From Build 51.10] [#440107, #440389]

Load Balancing

A very slow memory leak occurs on the secondary node in a high availability pair if all of the following conditions are met:
a) The configuration is large (approximately 4MB).
b) The configuration includes a large number of “bind lb group” commands.
c) Configuration changes very frequently, resulting in frequent synchronization.
[From Build 52.11] [#457639]

The Citrix-WI-Extended monitor cannot be used if the Web Interface server is not set up for explicit authentication mode.
[From Build 52.11] [#480852]

Command line output is not displayed on the GUI while the configuration is synchronized. The output is not displayed even when the "No Warning" check box is not selected.
[From Build 50.10] [#456144]

NetScaler Gateway

During an endpoint analysis scan, NetScaler Gateway does not detect Trend Micro Titanium installed on a Mac OS X computer. As a result, the scan always fails.
[From Build 50.10] [#474615]

Earlier versions of the NetScaler Gateway Plug-in do not support OPSWAT endpoint analysis scans. When users connect to NetScaler Gateway, logon fails because the earlier version of the plug-in does not support OPSWAT endpoint analysis scans. Users can log on from a web browser and then select Network Access, which starts the upgrade to the latest version of the NetScaler Gateway Plug-in and the Endpoint Analysis Plug-in.
[From Build 50.10] [#454670]

If you configure a preauthentication policy that checks for Avira Antivirus on a Mac OS X computer and the virus definitions update by using the SCAN-TIME/VIRDEF-FILE-TIME parameter, the OPSWAT libraries use the date and not the time. You must configure this setting by using the number of days between updates.
[From Build 50.10] [#467180]

If you configure the Web Interface home page with an IPv6 URL instead of IPv4 or the fully qualified domain name (FQDN), users receive a 400 Bad request error when they log on.
[From Build 50.10] [#482263]

When users log on for the first time by using the NetScaler Gateway Plug-in for Mac, the Safari web browser starts the endpoint analysis web page instead of the NetScaler Gateway Plug-in download page.
[From Build 50.10] [#454662]

If you enable the Green Bubble theme and then clear the entire ns config , the Green Bubble theme remains instead of reverting back to the Default theme. To reset the value, you can run the command set vn para uitheme <value>.
[From Build 50.10] [#478536]

If you configure SSL renegotiation and users log on with a PKI-enabled client certificate, logon fails.
[From Build 51.10] [#487825]

If you configure logon and logoff scripts that are part of a session profile, if the scripts contain Unicode characters, users cannot log on or log off of NetScaler Gateway.
[From Build 50.10] [#469799]

When you use the Set Up NetScaler for XenApp/XenDesktop wizard in NetScaler, apply optimization settings, and bind the cache policy globally, when users log on with the NetScaler Gateway Plug-in and open Citrix Receiver, the applications and desktops do not appear. The following message appears: There are no apps or desktops assigned to you at this time. Citrix recommends disabling the optimization settings.
[From Build 51.10] [#411152]

Citrix recommends that you do not bind Policy Infrastructure (PI) policies to the NetScaler Gateway virtual server. NetScaler Gateway does not support PI policies.
[From Build 50.10] [#481722]

If users log on to Outlook Web App by using clientless access in a Firefox web browser, sending email fails.
[From Build 50.10] [#418106, #418880]

When users log on, they receive a prompt to install the Endpoint Analysis Plug-in, even though the latest version of the plug-in is installed on the user device.
[From Build 50.10] [#446735]

If users log on by using the NetScaler Gateway Plug-in dialog box and the endpoint analysis scan fails, the choices pages appears in Internet Explorer. When this occurs, the correct cookies are not sent from Internet Explorer and users receive a 403 forbidden error message or the Endpoint Analysis Plug-in web page appears.
[From Build 50.10] [#447689]

If you created a Netscaler Gateway virtual server by using the Quick Configuration wizard in NetScaler Gateway 10.1, the virtual server needs to be renamed with the prefix _XM_. For example, if the original virtual server name is XMGateway, you must manually rename it to _XM_Gateway. By changing the name with the correct prefix, you can see the virtual server in the wizard.
[From Build 50.10] [#484962]

If you enable digest authentication in Internet Information Services (IIS), if users log on with Unicode credentials, add the IIS website as a bookmark and then click the bookmark, single sign-on fails. Users receive a prompt to enter their user name and password.
[From Build 50.10] [#470495]

If you enable a proxy server and disable ICA proxy in a session profile, users are not able to start published applications.
[From Build 50.10] [#470220]

If you configure an endpoint analysis expression that includes hard disk encryption scan types ENC-TYPE and ENC-PATH, a -13 error message always appears. For example, you use the expression HD-ENC_76003_ENC-PATH_
[From Build 50.10] [#457436]

If you configure advanced endpoint analysis policies, endpoint analysis encryption, a proxy server, and client certification authentication, the NetScaler Gateway Plug-in does not connect and users receive the error message " 2017: Your computer does not have the necessary security software to connect to the NetScaler Gateway. Please contact your system administrator."
[From Build 50.10] [#466641]

NetScaler Insight Center

In some instances, the bar line on a graph appears outside the time points on the x-axis.
[From Build 51.10] [#446120]

The Web Insight reports might not display geo maps for some locations.
Workaround: The tabular representation displays the details.
[From Build 50.10] [#484578]

When you export reports, in certain scenarios, the tables shown in the exported reports might not have borders.
[From Build 52.11] [#471239]

The NetScaler Insight Center reports display an incorrect session reconnect value for CloudBridge appliances.
[From Build 51.10] [#496899]

The hop diagram for current session applications does not display the link between the CloudBridge device and the server.
Workaround: Refresh the page.
[From Build 52.11] [#483122, #502260]

Downgrading NetScaler Insight Center from release 10.5 to release 10.1 is not supported.
[From Build 50.10] [#486295]

After a NetScaler upgrade or downgrade, NetScaler Insight Center does not report any data on the dashboard.
[From Build 50.10] [#405936]

NetScaler Insight Center displays the RTT value as NA in cases where the ICA RTT value exported from device is zero.
[From Build 51.10] [#486191]

If Appflow for ICA is enabled on a NetScaler ADC, the NetScaler Insight Center reports should show XenDesktop details, but that is not always the case. When certain users access XenDesktop, the reports show the application details instead.
[From Build 51.10] [#482590]

NetScaler Insight Center displays the following error if a NetScaler ADC maintains more than 20 active sessions.
'Excess connection than the CFE limit for NetScaler'
[From Build 50.10] [#484492]

The NetScaler ADC might fail if you enable AppFlow for ICA and access XenApp or XenDesktop through the Windows Receiver client.
[From Build 51.10] [#490680]

The NetScaler ADC fails, if AppFlow is enabled and it receives an ICA command whose length is more than 2048 bytes.
[From Build 50.10] [#504990]

The following error can occur when you use an IE8 browser to access NetScaler Insight Center from XenDesktop 5.6 or XenApp 6.5: "Object does not support this property or method."
[From Build 52.11] [#402105]

If AppFlow is enabled for a virtual server on more than one NetScaler Insight Center virtual appliance, the clear AppFlow configurations (Configuration > Inventory > <ipaddress> > Application List > <ipaddress> > Action > Clear AppFlow Configuration) operation does not work on the virtual server that has the lowest priority.
[From Build 50.10] [#405853]

Netscaler Insight Center (Issue IDs 0388096, 0423109)
When you launch XenApp through Citrix Receiver (standard edition), the app launch duration is not calculated and is shown as zero.
[From Build 52.11] [#388096, #423109]

On the HDX Insight reports, a Y-axis value of 0 is sometimes shown at a location higher than the x axis.
[From Build 51.10] [#414214]

NetScaler Insight Center might not correctly report user sessions with multi-stream ICA connections.
[From Build 51.10] [#470481]

NetScaler Insight Center reports might show a different gateway and network mask for a CloudBridge device used for monitoring AppFlow traffic.
[From Build 51.10] [#488886]

All the metrics except bandwidth and hits display the average values.
[From Build 51.10] [#409634]

NetScaler SDX Appliance

If there is an Xenserver Console session open for a NS-VPX during shutdown, the VPX gets stuck in the Halt state.
[From Build 50.10] [#480351]

If multiple SDX VPX are sharing the same CPU core, the CPU usage might be approximately 50% higher in NetScaler 10.5 version as compared to NetScaler 10.1 version.
[From Build 50.10] [#480853]

If you are logging in Management Service using Public Key authentication, then password less SSH log in does not work.
[From Build 50.10] [#473904]

In SDX systems, sometimes interface or channel binding to a VLAN fails. This happens only if the interface is down or one of the member interfaces of a channel is down.
[From Build 52.11] [#474438, #493664]

If you are accessing the management service directly through console on NetScaler SDX or Insight Center products, the credentials nsroot/nsroot do not work. The credentials root/nsroot work as before and SSH access to the management service also works as before with either of the credentials.
[From Build 50.10] [#438342, #461286]

NetScaler VPX Appliance

A NetScaler that is deployed on the Hyper-V may crash or unexpectedly reboot if it uses three or more virtual interfaces in the VPX instance.
[From Build 50.10] [#467734, #469552, #471601, #476833, #484210, #489880]

NetScaler VPX cannot be directly imported into Hyper-V on Windows Server 2012 R2 using the "Import Virtual Machine" function of Hyper-V Manager.
Workaround: Create the VPX instance by using the New > Virtual Machine function and connecting the "Dynamic.vhd" file from the Virtual Hard Disks directory which is present after unzipping the release image.
Note: The newly created VPX instance MUST be configured with a minimum of 2GB memory and with 2 vcpus; setting the vcpus is done by changing the virtual machine settings after the instance is created, but before booting.
[From Build 50.10] [#428107]

In a high availability (HA) configuration on Amazon AWS, HA failover might not happen properly.
Workaround: Warm restart the NetScaler VPX appliances.
[From Build 51.10] [#493725]

Networking

If a NetScaler appliance on which the cache redirection feature is enabled supports jumbo frames on the client-side connection but not supported on the server-side connection, the client-side connection behaves as a regular connection.
[From Build 50.10] [#422858]

ZebOS API call to NetScaler ADC fails when the ns ipv6-routing command is part of the input routing config set.
[From Build 50.10] [#439294]

For a link redundancy using LACP channels configuration with two sub channels, the maximum supported throughput for both the sub channels falls below the configured lrMinThroughput value, link failover does not occur when the maximum supported throughput of the standby sub channel becomes equal to or greater than the lrMinThroughput value.
[From Build 50.10] [#470980]

NetScaler VPX instances running on a XenServer/HyperV hypervisor do not support Link Layer Discovery Protocol (LLDP).
[From Build 50.10] [#477413]

Jumbo frames are not supported on NetScalet MPX 15000 and MPX 17000 Platforms.
[From Build 50.10] [#485941]

When the NetScaler appliance forwards packets that are larger than the interface's MTU value, the appliance fragments the packets into 2048-byte packets, regardless of the MTU value configured.
For example, if the appliance forwards a 9000-byte packet on an interface that you have configured with an MTU of 4000, the appliance fragments the 9000-byte packets into 2048
[From Build 50.10] [#429006]

Jumbo frames are not supported on an IPv6-IPv6 tunnel.
[From Build 50.10] [#420198]

Jumbo frames are not supported on NetScaler SDX appliances.
[From Build 50.10] [#437520]

Jumbo frames are not supported on NetScaler VPX appliances.
[From Build 50.10] [#485905]

The NetScaler ADC might not update its bridge and ARP tables with the information received from GARP messages.
[From Build 52.11] [#497277]

In an active-active high availability configuration using Virtual Router Redundancy Protocol (VRRP) protocol, PING to a virtual IP address (VIP) might fail from a node, which is a backup node for this VIP address.
[From Build 51.10] [#485260]

On a NetScaler ADC, when the MTU of a VLAN and Intermediate System to Intermediate System (IS-IS) Link Sate Packet (LSP) are set to a value lesser than 1500, the IS-IS process fails to send the IS-IS protocol data units (PDUs) of the set MTU size until the process is restarted.
[From Build 50.10] [#485374]

High availability (HA) synchronization does not work properly after you upgrade an HA setup from beta build of 10.5 release to GA build of 10.5 release.
Workaround: Disable HA propagation and HA synchronization before upgrading the HA setup and enable them after the upgrade process is complete.
[From Build 50.10] [#486131]

In an HA configuration in INC mode where both the nodes run the OSPF routing protocol, the secondary node drops all the L3 traffic that has the destination that was advertised by the secondary node.
[From Build 51.10] [#318684]

The IS-IS level 1-2 adjacency between NetScaler ADC and Cisco Nexus Router might flap.
[From Build 50.10] [#485385]

When the MTU of a VLAN is set to 500, the adjacency of Intermediate System to Intermediate System (IS-IS) protocol fails in this VLAN because the IS-IS process on the NetScaler ADC works with a minimum MTU value of 520.
[From Build 50.10] [#485391]

If you have enabled Source IP Persistency on multiple IPv4 RNAT rules that have the same condition but with different NAT IP addresses, the NetScaler command line and the configuration utility displays Source IP Persistency as ENABLED only for one of these rules.
[From Build 50.10] [#459679]

The source IP persistency functionality might not work for an RNAT rule that does not have the NAT IP parameter set to an IP address.
[From Build 50.10] [#455936]

Platform

L2 mode is not supported on Netscaler VPX instances running on a Linux-KVM host.
[From Build 51.10] [#402113]

Policies

When a responder policy is configured with a log action, an issue in evaluating the policy expression that is configured in the log action can result in the NetScaler crashing.
Workaround: There is no workaround for this issue. However, you can attempt to disable the log action if this issue is observed.
[From Build 51.10] [#446507]

SSL

In a cluster setup, if you include the "cipherdetails" option in the "show ssl service" or "show ssl vserver" command, an incorrect message appears. This is only a display issue.
For example,
> sh ssl service svc1 -cipherDetails
ERROR: No such resource [serviceName, svc1]
[From Build 50.10] [#402423]

If you try to add a certificate bundle with the complete path to the file, an error message appears. For example,
> add ssl certkey bundle -cert /nsconfig/ssl/bundle3.pem -key /nsconfig/ssl/bundle3.pem -bundle YES
ERROR: Processing of certificate bundle file failed.
Workaround: Specify only the file name. For example,
> add ssl certkey bundle -cert bundle3.pem -key /nsconfig/ssl/bundle3.pem -bundle YES
[From Build 50.10] [#481878]

An SSL chip is disabled at the third reinitialization attempt. That is, the maximum reinitialization limit is 2. Earlier, this limit was 5.
[From Build 50.10] [#455821]

If CRL auto refresh is enabled and the LDAP method is selected, the following, incorrect, error message appears: "Either URL or server-IP required on CRL"
This message should indicate that a server IP address is required.
[From Build 50.10] [#459987]

System

The NetScaler randomly crashes when SPDY is enabled on a NetScaler deployment which has integrated caching or front end optimization enabled. This occurs due to some interaction issues.
Workaround: Disable SDPY when integrated caching or front end optimization is enabled.
[From Build 51.10] [#486257]

In a high availability setup, a crash in the nsfsyncd process results in HA failover.
[From Build 51.10] [#490622, #496613]

If a NetScaler interface configured for jumbo frames is subjected to persistent congestion, and the NetScaler appliance is operating under low memory conditions, the appliance might not have enough buffers to handle jumbo frames.
[From Build 50.10] [#431913]

Downloading a file over a TCP connection in which the client side has a non-jumbo MSS (less than or equal to 1460 bytes) and the server side has a jumbo MSS (greater than or equal to 1460 bytes), causes a slight increase in latency.
[From Build 50.10] [#428209]

For virtual servers and services using the default TCP profile (nstcp_default_profile) with the MSS parameter set to zero, the NetScaler appliance uses 1460 as the value for TCP MSS instead of using a value based on interface MTU and VLAN MTU.
[From Build 50.10] [#472833]

When configuring Web Interface sites through the wizard, when the "Trust ssl certificate" option is checked, certificates bound to the VPN virtual server are not imported to the JVM.
Workaround: You must import the certificates manually by executing the following command from the shell prompt:
> /netscaler/wi/export_cert.sh
[From Build 50.10] [#481008]

When the management CPU is running at close to 100% of capacity, the aggregator might not be able to process some of the statistics requests from clients, such as requests from the configuration utility, the CLI, and SNMP. If the aggregator fails to respond within the timeout period, the client returns following error:
Invalid response from the aggregator [Device not Configured]
[From Build 51.10] [#377618, #341460, #351127, #364015, #481575, #499259]

When using MPTCP, if a single SSL record is split into a large number (> 100) of small segments, an SSL buffer overrun causes the NetScaler appliance to crash.
[From Build 51.10] [#427126, #441982, #452885, #456645]

The NetScaler appliance may display messages that are a result of file system compatibility checks that are performed when booting up. These messages are informational only, and do not have any adverse impact on the functioning of the NetScaler.
[From Build 51.10] [#452382, #459464]

The "unset authentication localPolicy" command is removed from this version onwards.
[From Build 50.10] [#483524]

Web Interface

On a NetScaler ADC, if WIHome is configured to point to an IPv6 load balancing virtual server that points to the IPv6 StoreFront services, a user trying to log on receives a 500 Internal Server Error message.
Workaround: Remove the IPv6 load balancing virtual server configuration and configure WIHome to point directly to the StoreFront server URL.
[From Build 51.10] [#397150]

The list of enhancements that were released in builds that were released prior to Build 52.11.

AAA-TM

With previous versions of the NetScaler ADC, OWA 2010 connections did not timeout because OWA sends repeated keepalive requests to the server to prevent timeouts, which interfered with single sign-n and posed a security risk. AAA-tm now supports forced timeouts that ensure that OWA 2010 sessions timeout after the specified period of inactivity.
For more information and configuration instructions, see the documentation.
[From Build 50.10] [#247952, #419622, #426196]

Renegotiate Support for Certificate-based Policies
AAA-TM now prompts for the client certificate only when it requires the certificate to authenticate a user, not every time that a protected application requests authentication. It retrieves the certificate if two factor authentication is not enabled, or if it is configured to extract the user name from the certificate.
[From Build 50.10] [#425621]

KCD Performance Improvements
When creating a KCD Account with a delegated user certificate and CA certificate, AAA now searches the /nsconfig/ssl directory for the two certificate files, where those certificates are kept, instead of searching /nsconfig/krb.
[From Build 50.10] [#412687]

NetScaler as SAML IDP
The NetScaler ADC can now act as a SAML identity provider (IDP). As an IDP, the ADP accepts SAML tokens from user sthat request access to a protected application, redirecting users to the SAML service provider (SP) logon page to authenticate. After the user authenticates, the ADC generates a SAML assertion that grants access to the protected resource and redirects the user to it. When the user logs out or is logged out by any SP, the ADC sends logout requests to all other SPs that the user accessed during the current session and terminates the session.
For more information, see the NetScaler documentation.
[From Build 50.10] [#406525]

Unlocking Locked-Out User Accounts
You can now unlock a user account that was locked out after too many failed logon attempts or after repeated violations of logon attempt time slice limits. To unlock a locked-out user account by using the configuration utility, navigate to Security > AAA-Application Traffic > Users. In the data pane, select the user account to unlock, and then in the Actions drop-down list, choose Unlock. To unlock a locked-out user account from the command line, type the following command:
unlock aaa user <userName>
[From Build 50.10] [#437164]

Strong Encryption Support in Kerberos KCD
AAA-TM now supports the aes256-sha1 and aes128-sha1 strong encryption methods for Kerberos KCD. Previously, when KCD was configured to use delegated user credentials, AAA used the relatively weak RC4-HMAC encryption algorithm to encrypt the timestamp when sending a ticket-granting request to the Kerberos server. If the system administrator had restricted use of weak encryption algorithms on the Kerberos server, the Kerberos server would respond with an error instead of the requested ticket, causing KCD to fail. AAA now uses aes256-sha1 to encrypt timestamps for delegated user credentials.
[From Build 50.10] [#427766]

NetScaler Default Expressions support for authentication subsystem
AAA-TM now supports NetScaler default syntax expressions in the following parts of the authentication subsystem:
* Authentication policy rules. You can use default syntax expressions as Authentication policy rules. The default syntax expression editor now appears in the configuration utility when you create or configure an authentication policy, From the command line, you can simply use default syntax to create the rule for your policy and AAA-TM will recognize and implement it.
* Authentication policy bindings. Authentication policies, when bound, can each be associated with the "nextFactor" policyset. The nextFactor policyset is evaluated if the policy to which it is associated succeeds. nextFactor support permits policy pairing and grouping, and allows you to create cascading chains of policies all of which can be evaluated in turn. There is no upper limit to the number of policies that can be chained in this manner.
All policies bound to a single authentication server must be either NetScaler default syntax policies or NetScaler classic syntax policies. You cannot mix both types of policy on a single authentication server.
[From Build 50.10] [#418615]

Responder After AAA
On a NetScaler ADC that has AAA configured, the ADC now invokes responder policies after authenticating users. Previously, users could not bookmark the authentication sign-on page. This limitation no longer exists.
[From Build 50.10] [#258274, #258277]

Authentication Server Stickiness
After a user authenticates successfully to an LDAP, RADIUS, or TACACS authentication or authorization server, the NetScaler ADC now connects to the same server for subsequent user authentications or authorizations. When a primary server is unavailable, this feature prevents delays while the ADC waits for the first server to time out before resending the request to the second server.
For example, assume that you have AAA configured on your ADC with three authentication policies--authpol1, authpol2, and authpol3--with priorities set to 10, 20, and 30 respectively. A user requests authentication, and the ADC discovers that the authentication server behind authpol1 does not respond to authentication requests. The ADC then tries authpol2, which responds. When other users attempt to authenticate after this situation occurs, the ADC skips authpol1 and proceeds directly to authpol2.
[From Build 50.10] [#358894]

AAA-TM can now be configured to authenticate users with an external RADIUS or LDAP authentication server at a specific FQDN instead of only at a specific IP. Configuration via FQDN can simplify an otherwise much more complex AAA configuration in environments where the authentication server might appear on any of several IPs, but always uses a single FQDN.
Note: When you configure AAA to authenticate to an external server via FQDN instead of IP, you add an extra step to the authentication process because the ADC must resolve the FQDN each time that it authenticates a user. If a great many users attempt to authenticate simultaneously, the DNS lookups might slow the authentication process.
To configure authentication by using a server's FQDN instead of IP, follow the normal configuration process except when creating the authentication action, where you substitute the serverName parameter for the serverIP parameter, as shown below:
> add authentication ldapAction <name> -serverName <serverName>
> add authentication radiusAction <name> -serverName <serverName>
For <serverName>, substitute the fully-qualified domain name (FQDN) of the LDAP or RADIUS authentication server.
[From Build 50.10] [#338718, #314443]

Extracting SAML Attributes from Keytab
The AAA Negotiate Action command can now extract user information from a keytab file instead of requiring you to enter that information manually. If a keytab has more than one SPN, AAA selects the correct SPN. You can configure this feature at the NetScaler command line, or by using the configuration utility.
To configure AAA to extract user information from a keytab file at the command line, type the appropriate command:
add authentication negotiateAction <name> [-keytab <string>]
set authentication negotiateAction <name> [-keytab <string>]
For <name>, substitute the name of the negotiateAction. If you are adding a new action, the name can be from one to 127 characters in length and can consist of upper- and lowercase letters, numbers, and the hyphen (-) and underscore (_) characters. For <string>, substitute the full path and filename of the keytab file that you want to use.
To configure AAA to extract user information from a keytab file by using the configuration utility, do the following steps:
1) Open Security, AAA, Policies, Authentication, Negotiate.
2) In the Data pane, click the Servers tab.
3) Do one of the following:
* If you want to create a new Negotiate action, click Add.
* If you want to modify an existing Negotiate action, in the data pane select the action, and then click Edit.
4) If you are creating a new Negotiate action, in the Name text box, type a name for your new action.
The name can be from one to 127 characters in length and can consist of upper- and lowercase letters, numbers, and the hyphen (-) and underscore (_) characters.
If you are modifying an existing Negotiate action, skip this step. The name is read-only; you cannot change it.
5) Under Negotiate, if the Use Keytab file check box is not already checked, check it.
6) In the Keytab file path text box, type the full path and filename of the keytab file that you want to use.
7) In the Default authentication group text box, type the authentication group that you want to set as default for this user.
8) Click Create or OK to save your changes.
[From Build 50.10] [#405134]

Web-based Authentication
AAA-TM is now able to authenticate a user to a web server, providing the credentials that the web server requires in an HTTP request and analyzing the web server response to determine that user authentication was successful.
To set up web-based authentication with a specific web server, first you create a web authentication action. Since authentication to web servers does not use a rigid format, you must specify exactly which information the web server requires and in which format when creating the action. To do this, you create an expression in NetScaler default syntax. Next you create a policy associated with that action. The policy is similar to an LDAP policy, and like LDAP policies uses NetScaler classic syntax.
[From Build 50.10] [#431391]

AAA-TM, Responder

Using a Responder HTML Response Page to provide Customized Error Responses
You can use the Citrix NetScaler Responder feature to create custom error responses when a user attempts to authenticate with AAA-TM and authentication fails. The Responder feature is flexible; you can create as many error responses as you wish, and respond to as many different error conditions. For example, if your users log on to different authentication servers in different geographic areas, you can customize responses to each region. A user in the United States can receive an error message that is appropriate to his or her authentication server, and be directed to a customer service telephone number in the United States. A user in Japan can receive the same for his or her different authentication server and customer service telephone number.
Briefly, to create a Responder configuration for this scenario, first create each error message and place that error message on a web server. The web server should not be located on the same physical server as the authentication server, and preferably not on the same subnet. If you have multiple regional data centers that host separate authentication servers, it is advisable to locate each error response in a different data center than hosts the authentication server that it is used for, so that local power outages or Internet connectivity problems do not affect the web server that hosts the error messages. Then, on the ADC, do the following steps:
1) Create one load balancing virtual server for each error message.
2) Create a policy for each error message that selects the requests that should receive this error message if authentication fails, and bind each policy to the appropriate load balancing virtual server.
3) Create a responder action for each error message that contains an HTTP 307 Redirect that points to the URL of the customized error message.
4) Create a responder policy for each error message that selects connections that should receive that error message, and bind that policy to the appropriate responder actions. You must craft a rule for the responder policy that selects connections that meet the appropriate criteria. For example, if you want connections that originate in the USA and that fail authentication to receive this error message, the rule could identify the region by source IP, and the authentication failure by error message.
5) Bind each responder policy to the correct virtual server, as shown below.
> bind lb vserver <vServerName> -policyName <policyName> -priority 1 -gotoPriorityExpression END
For detailed instructions on how to set up a responder configuration of this type by using the command line, see the following article on the Citrix Customer Support web site:
http://support.citrix.com/article/CTX129108
[From Build 50.10] [#414985]

AppFlow

The process of collecting the load time and render time of web pages has been simplified by including the clientSideMeasurements parameter as part of the add appflow action command.
On the command line interface, enable this option by running the following command:
> add appflow action <name> -clientSideMeasurements ENABLED
For details about configuring an AppFlow action, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/ns-ag-appflow-config-actn-tsk.html.
[From Build 50.10] [#434577]

NetScaler ADC now exports AppFlow records to a set of collectors if the transaction responses are served from the NetScaler cache.
[From Build 50.10] [#423567]

Indication for End of Transaction
A transaction flag now indicates, to external collectors, whether the transaction was successfully completed or was aborted.
[From Build 50.10] [#252000]

Cisco RISE Integration

Configuring RISE with NetScaler ADC and Cisco Nexus 7000 Switches.
You can now use Remote Integrated Service Engine (RISE) technology to integrate a NetScaler ADC and a Cisco Nexus 7000 Series switch. This combination offers layered network services, including robust application delivery capabilities that accelerate application performance for all users.
With a RISE based implementation, the NetScaler functionality is available as a centralized resource that can be leveraged across the application infrastructure supported by the Cisco Nexus 7000 series switch. The key functionalities of the RISE architecture include:
- Plug and play auto-provisioning. RISE provides a plug and play auto-provisioning feature. When you directly connect the NetScaler ADC to the Cisco Nexus 7000 series switch, auto-discovery commences.
- Discovery and bootstrapping. The discovery and bootstrap mechanism enables the Cisco Nexus 7000 Series switch to communicate with the NetScaler ADC by exchanging information to set up a RISE channel, which transmits control and data packets.
- Health Monitoring. The NetScaler ADC uses its health monitoring feature to track and support server health by sending health probes to verify server responses.
- Automatic Policy Based Routing (APBR). Automatic Policy Based Routing (APBR) automatically routes the return traffic from the servers to the NetScaler ADC, preserving the client IP addresses. The automatic policy based routes are defined on the Cisco Nexus 7000 series switch. When the return traffic from the server reaches the Cisco Nexus 7000 series switch, the APBR policies defined on the switch route the traffic to the NetScaler ADC, which in turn routes the traffic to the client.
[From Build 50.10] [#413833]

Cluster

Link Redundancy Support in a Cluster
The NetScaler cluster now provides link redundancy with LACP. For more information, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/ns-cluster-traf-dist-link-redundancy-con.html.
[From Build 50.10] [#415116]

Layer2 Mode Support in a Cluster
You can now use the Layer2 mode in a NetScaler cluster. For more information, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/ns-cluster-l2-mode-con.html.
[From Build 50.10] [#441320]

VRID/VRRP is now supported on a NetScaler cluster.
[From Build 50.10] [#407100]

MPTCP is now supported on a NetScaler cluster.
[From Build 50.10] [#423654]

Traffic domains are now supported on a NetScaler cluster.
[From Build 50.10] [#415065]

A NetScaler cluster can now be configured to run with less than (n/2 + 1) number of nodes online. To do this, while creating a cluster instance, you must set the "quorumType" parameter to none as shown here:
> add cluster instance <clid> -quorumType None
[From Build 50.10] [#407139]

Spotted VIP for NetScaler Gateway clusters. Spotted VIP functionality has been expanded to enable clustering for NetScaler Gateway.
[From Build 50.10] [#317314]

You can now add a failover interface set (FIS) on the nodes of a NetScaler cluster. On the cluster IP address, specify the ID of the cluster node on which the FIS must be added as follows:
> add fis <name> -ownerNode <nodeId>
Note:
- The FIS name for each cluster node must be unique.
- A cluster LA channel can be added to a FIS. You must make sure that the cluster LA channel has a local interface as a member interface.
[From Build 50.10] [#430035]

Net profiles are now supported on a NetScaler cluster. You can bind spotted IP addresses to a net profile which can then be bound to spotted load balancing virtual server or service (defined using a node group) with the following recommendations:
- If the "strict" parameter of the node group is "Yes", the net profile must contain a minimum of one IP address from each node of the node group member.
- If the "strict" parameter of the node group is "No", the net profile must include at least one IP address from each of the cluster nodes.
- If the above recommendations are not followed, the net profile configurations will not be honored and the USIP/USNIP settings will be used.
[From Build 50.10] [#416827]

Compression

Specifying a Vary Header Value
When using HTTP compression, you can explicitly specify a "vary" header value for compressed responses. Prior to this enhancement, the vary header was implied to be "Accept-Encoding, User-Agent".
To specify the customized vary header globally:
> set cmp parameter -addVaryHeader ENABLED -varyHeaderValue <string>
To specify the customized vary header for a specific compression action:
> add cmp action <name> <cmpType> -addVaryHeader ENABLED -varyHeaderValue <string>
[From Build 50.10] [#346214]

Configuration Utility

Distinguish between Commands Executed from Different NetScaler Interfaces
The NetScaler now keeps track of the interfaces through which operations are executed. You can view this information in syslogs (in the NetScaler GUI, navigate to Configuration > System > Auditing > Audit Messages > Syslog messages) or in the ns.log (located at the /var/log/ directory) file.
For example, operations that are performed through the API are flagged as "API CMD_EXECUTED".
[From Build 50.10] [#361917]

The NetScaler graphical user interface (GUI) has been enhanced to provide a better user interaction experience. It now provides you with a workflow-based experience, which guides you through the entire configuration. The configuration settings have been classified as basic and advanced for some features. The NetScaler ADC configuration utility and NetScaler Gateway configuration utility has also been reimplemented in HTML. As a result of these enhancements, the GUI does not display pop-up dialog boxes for most features and you no longer need Java Runtime Environment (JRE) to access these features through the GUI.
For more information, see http://support.citrix.com/proddocs/topic/ns-rn-main-release-10-5-map/ns-rn-changes-gui-10-5-con.html
[From Build 50.10] [#251336, #251607, #251645, #251760, #251797, #257879, #257949, #261240, #261339, #285382]

Content Accelerator

Content accelerator is a NetScaler feature that you can use in a Citrix ByteMobile T1100 deployment, to store data on a Citrix ByteMobile T2100 appliance. This saves bandwidth and provides faster response times, because the NetScaler does not have to connect to the server for repeated requests of the same data.
For more information, see http://support.citrix.com/proddocs/topic/ns-optimization-10-5-map/ns-content-accl-con.html.
[From Build 50.10] [#427565]

Content Switching

When you create a content switching virtual server, NetScaler now supports using DNS TCP as the protocol used by the virtual server.
[From Build 50.10] [#365650]

Content Switching Support for Diameter
The NetScaler ADC now supports content switching for the Diameter protocol. A number of expressions have been added, and you can use them to examine the header and the attribute-value pairs (AVPs) in a Diameter packet. On the basis of that information, you can forward the request to the selected load balancing virtual server.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-cs-customizing-diameter-for-cs-tsk.html.
[From Build 50.10] [#413072]

Multiple Port Content Switching Support for SSL_TCP Virtual Servers
You can now configure the NetScaler ADC so that SSL_TCP content switching virtual servers listen on multiple ports without having to configure separate virtual servers. Instead of configuring multiple virtual servers with the same IP address and different ports, you can now configure one IP address and specify the port as * . As a result, the configuration size is also reduced.
[From Build 50.10] [#450367]

Multiple Port Content Switching Support for HTTP and SSL Virtual Servers
You can now configure the NetScaler ADC so that HTTP and SSL content switching virtual servers listen on multiple ports without having to configure separate virtual servers. This feature is especially useful if you want to base a content switching decision on a part of the URL and other L7 parameters. Instead of configuring multiple virtual servers with the same IP address and different ports, you can now configure one IP address and specify the port as *. As a result, the configuration size is also reduced.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-cs-customizing-multiport-http-ssl-tsk.html
[From Build 50.10] [#386601]

DNS

NAPTR DNS Record
NetScaler ADC supports DNS NAPTR (Naming Address Pointer) record type. NAPTR records are generic DNS record type, but are commonly used in internet telephony for service discovery. They therefore enable clients to discover which server the request should go to for a particular service and which protocol to use to connect to the server.
NetScaler ADCs support NAPTR in two modes: ADNS mode and proxy mode. You can create a NAPTR record using both, command line interface and the NetScaler Configuration Utility.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-tmg-dns-crt-naptr-rec-tsk.html
[From Build 50.10] [#413773]

AA bit set for response from NetScaler Cache
In the previous releases, for NODATA responses with AA bit, NetScaler would ignore AA bit (authoritative bit) while caching. For such DNS queries NetScaler would reply with NODATA response from cache without setting the AA bit. The behavior has been enhanced with current release. NetScaler will respond with the AA bit for negative cached responses just as it does for positive cache responses.
[From Build 50.10] [#285009]

CNAME Record Caching
NetScaler ADC when deployed in a proxy mode does not always send the query for an address record to the back-end server. This happens when for an answer to a query for an address record, a partial CNAME chain is present in the cache. Under few conditions, ADC caches the partial CNAME record and serves the query from the cache.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-tmg-dns-caching-cname-record-con.html
[From Build 50.10] [#422509]

Enabling or Disabling the Recursion Available Flag
A new parameter -RecursionAvailabe (YES|NO) is introduced in load balancing virtual server (for DNS and DNS_TCP types). The option by default has a value of NO. When you use the load balancing virtual server to load balance recursive resolvers, you can turn this option to YES. This will cause NetScaler to respond with RA bit set on all responses.
[From Build 50.10] [#403114, #248936, #269857, #388338]

DataStream

Support for Fallback to NTLM Authentication
Currently AAA supports Kerberos authentication only with Datastream Windows Authentication. AAA does not support fallback to NTLM if Kerberos authentication fails.
[From Build 50.10] [#382693]

Support for Database Specific Load Balancing for MySQL
Database specific load balancing is now supported for MySQL databases. If a database is available on multiple servers but is online on only some of these servers, the client request is forwarded to the server on which the database is online. Enable the DBSLB option when you create a load balancing virtual server. To store the database list on the NetScaler ADC, while creating a MYSQL-ECV monitor, enable storeDB.
[From Build 50.10] [#418490]

Support for Transparent Deployment Mode in MySQL
You can now configure the NetScaler ADC to operate transparently between MySQL clients and servers, and to only log or analyze details of all client-server transactions. Transparent mode is designed so that the ADC only forwards MySQL requests to the server, and then relays the server's responses to the clients. As the requests and responses pass through the ADC, the ADC logs information gathered from them, as specified by the audit logging or AppFlow configuration, or collects statistics, as specified by the Action Analytics configuration. You do not have to add database users to the ADC.
[From Build 50.10] [#410824]

Support for SQL Server High-Availability (HA) Group Deployment
The NetScaler ADC now supports AlwaysOn Availability group deployment in database specific load balancing for MSSQL 2012.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-dbproxy-db-specific-lb-for-mssql-2012-tsk.html
[From Build 50.10] [#415485]

GSLB

GSLB Auto Sync Enhanced to to Sync Static Proximity Database
GSLB autosync has been enhanced to synchronize global server load balancing (GSLB) static proximity databases. When autosync is triggered on the master site, first the static proximity database is synchronized followed by the synchronization of configuration.
For more information see, http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-gslb-synchro-static-proximity-db.html
[From Build 50.10] [#286236]

Integrated Caching

Cache Object Persistence in a High Availability Setup
When integrated caching is used in a high availability setup, in addition to storing the cached objects on the primary appliance, the objects are also stored on the secondary appliance. This reduces bandwidth usage as cached objects are not lost during failover and the request can then be served directly from the cache of the secondary appliance.
To enable this functionality globally, execute the following command:
> set cache parameter -enableHaObjPersist Yes
To enable this functionality on a specific content group, execute the following command:
> set cache contentGroup <name> -persistHA Yes
[From Build 50.10] [#329012]

Increased Metadata Cache Capacity
The number of cached objects that the cache memory can store has now been increased.
[From Build 50.10] [#417677]

Load Balancing

Rate Limiting Support for Diameter
You can now configure rate limiting for diameter messages. In the following example, NetScaler limits the rate to 100 messages per second and sends UNABLE_TO_DELIVER if the rate exceeds that limit.
> add ns limitidentifier rslm1 -threshold 100 –timeSlice 1000 -mode REQUEST_RATE -limittype bursty
> add responder action rsact1 respondwith "DIAMETER.NEW_ERROR_ANSWER + DIAMETER.NEW_AVP(263, DIAMETER.REQ.SESSION_ID.VALUE) + DIAMETER.NEW_AVP_UNSIGNED32(268, 3002)"
> add responder policy rspol1 "SYS.CHECK_LIMIT("rslm1")" rsact1
[From Build 50.10] [#399053]

Increased Limits on the Number of Service Groups
You can now configure up to 8K (8192) service groups on a NetScaler appliance. The earlier limit was 4K (4096) service groups.
[From Build 50.10] [#406355]

Support for Jumbo Frames in RADIUS
The NetScaler ADC now supports RADIUS jumbo frames.
For more information on jumbo frames, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/ns-nw-jf-overview-con.html.
[From Build 50.10] [#429415]

Monitors for XenMobile Device Manger (XDM) and XenMobile Device Connector (XNC)
NetScaler allows a user to create monitors to check the status of the XenMobile Device Manager (XDM) and XenMobile NetScaler Connector (XNC) servers. The citrix-xdm monitor is used to monitor the XDM server while the citrix-xnc-ecv monitor is used to monitor the XNC server. You can add these monitors by using the add lb monitor command from the command-line interface or by using the GUI.
* The XDM monitor uses the username, password, and site path strings to probe the XDM server.
* The XNC monitor uses the username, password, send, and recv strings to probe the XNC monitor.
[From Build 50.10] [#402361]

NITRO API

Python SDK for NetScaler SDX and NetScaler Insight Center NITRO
NITRO now provides Python SDKs for configuring the NetScaler SDX appliance and the NetScaler Insight Center appliance. The SDKs can be downloaded from the Downloads page of the appliance's configuration utility.
[From Build 50.10] [#451606]

Uploading and Retrieving Files for NetScaler SDX Using NITRO
NetScaler SDX operations such as configuring SSL certificates requires the input files to be available locally on the appliance. NITRO allows you to perform file operations such as uploading file to the SDX, retrieving a list of files and the file content from the SDX, and also delete files from the SDX. These operations can be performed for files of type: cert,key, software images etc.
[From Build 50.10] [#408441]

Python SDK for NetScaler NITRO
NITRO now provides a Python SDK for configuring the NetScaler appliance. The SDK can be downloaded from the Downloads page of the NetScaler appliance's configuration utility.
[From Build 50.10] [#425725]

Uploading and Retrieving Files for NetScaler Using NITRO
NetScaler operations such as configuring SSL certificates requires the input files to be available locally on the NetScaler appliance. NITRO allows you to perform file operations such as uploading file to the NetScaler, retrieving a list of files and the file content from the NetScaler, and also delete files from the NetScaler. These operations can be performed for files of type: txt, cert, req, xml, and key.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-main-api-10-5-map/ns-nitro-rest-file-ops-ref.html.
[From Build 50.10] [#262824, #257935, #259969]

NetScaler Gateway

Advanced endpoint analysis
NetScaler Gateway contains built-in scans for a wide variety of applications and services with the Endpoint Analysis Plug-in for Windows- based computers and Mac OS X computers. Additionally, the expression editor for advanced endpoint analysis has been implemented in HTML within the configuration utility.
[From Build 50.10] [#417360]

RADIUS accounting.
RADIUS accounting functionality has been added to RADIUS authentication.
[From Build 50.10] [#388723]

Tranferring ICA Proxy Sessions Between Devices
If you configure a SmartAccess virtual server, when users log on from multiple devices, you can transfer the ICA Proxy session to another device and restrict users to one Universal license. For example, if users log on by using Citrix Receiver on their computer and then log on again from a mobile device, this consumes two NetScaler Gateway Universal licenses and creates two sessions for one user. You can prevent the two sessions by enabling the setting ICA Proxy Session Migration on the virtual server. When you enable this setting, the user session transfers to the new device and uses one Universal license.
To enable session transfer
1. In the configuration utility, on the Configuration tab, in the navigation pane, expand NetScaler Gateway and then click Virtual Servers.
2. In the details pane, select a SmartAccess virtual server and then click Open.
3. Select ICA Proxy Session Migration and then click OK.
[From Build 50.10] [#428669, #436370]

NetScaler Insight Center

NetScaler Insight Center can now dynamically set the threshold value for the maximum number of hits on each URL. For details, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-manage-threshold-tsk.html
NetScaler Insight Center now facilitates efficient querying of its database.
For details on enabling this functionality, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-change-db-index-settings.html
You can now enable NetScaler Insight Center to periodically remove the out-of-date content from its database. For details, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-change-db-cleanup-settings.html
[From Build 50.10] [#479004]

Data record logs provide detailed information about appflow records that NetScaler Insight Center collects from NetScaler ADCs.
For more information, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-change-data-record-log-settings.html.
[From Build 50.10] [#471025]

HDX Insight Center reports now support the following metrics:
-Client side zero window size event: This counter indicates how many times the client advertised a zero TCP window.
-Server side zero window size event: This counter indicates how many times the server advertised a zero TCP window.
-Client side fast RTO: This counter indicates how many times the retransmit timeout was invoked on the client-side connection.
-Server side fast RTO: This counter indicates how many times the retransmit timeout was invoked on the server-side connection.
[From Build 50.10] [#424355]

NetScaler Insight Center now saves the following data for a specific time period before it is purged:
* 30 second data - Saves for 6 minutes
* 5 minute data - Saves for 65 minutes
* Hourly data - Saves for 25 hours
* Daily data - Saves for 31 days
[From Build 50.10] [#404805]

Even if Appflow is disabled for a virtual server, you can clear the configuration in the NetScaler Insight Center by selecting Clear AppFlow Configurations from the Action list.
[From Build 50.10] [#399329]

HDX Insight now provides a report about active sessions, grouped by server IP and gateway IP.
[From Build 50.10] [#398322]

Cache Redirection Insight Support
NetScaler Insight Center now analyzes the traffic flowing through NetScaler ADC to cache servers and origin servers, and provides useful information about the cache performance, such as:
- Bandwidth saved while serving requests from the cache server instead of the origin server.
- Bandwidth consumed when requests bypassed the cache server and were served from the origin server.
- Number of times a URL was accessed from the cache server instead of the origin server.
For details on Cache Redirection Insight, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-usecase-webinsight-cache.html.
[From Build 50.10] [#409842]

Authentication and Authorization Support.
Authentication with the NetScaler Insight Center virtual appliance can be local or external. With external authentication, NetScaler Insight Center grants user access on the basis of the response from an external server. It supports the following external authentication protocols:
-Remote Authentication Dial In User Service (RADIUS)
-Terminal Access Controller Access-Control System (TACACS)
-Lightweight Directory Access Protocol (LDAP)
Authorization through the NetScaler Insight Center virtual appliance is local. The virtual appliance supports two levels of authorization. Users with superuser privileges are allowed to perform any action. Users with readonly privileges are allowed to perform only read operations. The authorization of SSH users requires superuser privileges. Users with readonly privileges cannot log on through SSH.
For more information see, http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-configuring-authentication-authorization-settings.html
[From Build 50.10] [#412466]

HDX Insight reports now include details about session reconnects, client-side retransmissions, and server-side retransmissions.
[From Build 50.10] [#392016]

On the dashboard, if you move the columns in a table and refresh the page, the column ordering is sometimes reset to default.
[From Build 50.10] [#414155]

In the dashboard, you can now select and rearrange the columns displayed in the tables. These changes persist across user sessions.
[From Build 50.10] [#423451]

Data Record Log Settings
NetScaler Insight Center now supports data record logs, which provide detailed information about AppFlow records that NetScaler Insight Center collects from NetScaler ADCs.
For more information, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-change-data-record-log-settings.html
[From Build 50.10] [#421777]

NetScaler Insight Center adaptive threshold functionality dynamically sets the threshold value for the maximum number of hits on each URL.
For more information, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-manage-threshold-tsk.html
[From Build 50.10] [#378995]

EUEM Session Data on HDX Insight Reports
HDX Insight reports now displays EUEM session data, which indicates the availability of EUEM data when an EUEM channel is established between the client and the server.
[From Build 50.10] [#367114]

The top-right corner of the page now displays a percentile icon, which you can click to display percentile values and the highest and lowest values for a selected metric.
[From Build 50.10] [#418196]

The GUI displays a real-time graphical representation of the CPU, memory, and disk resources used by the NetScaler Insight Center virtual appliance.
To display additional details, on the Configuration tab, navigate to NetScaler Insight Center and click Statistics.
[From Build 50.10] [#474067]

The active sessions data on the dashboard now include the following metrics:
Client IP: IP address of the client
Server IP: IP address of the server
NetScaler IP: NetScaler IP address
[From Build 50.10] [#427504]

You can now customize NetScaler Insight Center reports to display the metrics that you want, and you can specify bar graphs or line graphs.
To make these changes, open the drop-down list next to the percentage icon in the top-right corner of the dashboard.
[From Build 50.10] [#427187]

You can now configure the ICA session timeout value for inactive sessions on the NetScaler Insight Center configuration tab.
For details, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-ica-session-timeout-tsk.html
[From Build 50.10] [#431957]

Hop Diagram Support
The HDX Insight reports now support hop diagrams, which provide complete details about the client, NetScaler ADC, and server in an active session.
To display the hop diagram, on the dashboard tab, navigate to HDX Insight > Users >, click on a user name and, in the Current Application Sessions table, click on the session diagram icon.
[From Build 50.10] [#443824]

Geo Map Support
The NetScaler Insight Center geo maps feature displays the usage of web applications across different geographical locations on a map. Administrators can use this
information to understand the trends in application usage and for capacity planning.
Geo maps provide information that answers questions such as the following:
-Which region has the highest number of clients accessing an application?
-Which region has the highest response time?
-Which region is consuming the most bandwidth?
For more information, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-usecase-geo-maps.html
[From Build 50.10] [#322120]

The database cache functionality of NetScaler Insight Center stores database content locally in the cache and serves the content to users without accessing the database server.
For more information, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-change-db-cache-settings.html.
[From Build 50.10] [#456295]

Managing Session Timeout Period
You can now configure the timeout period for how long a user or a group can remain in an idle state before being terminated.
Enable this option while configuring user accounts or user groups.
For more details on configuring a user account or a group account, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-add-user.html or http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-add-group.html.
[From Build 50.10] [#452424]

If the length of URLs displayed in the Web Insight reports is very long, you can enable the trim URL functionality to remove the query string from the URL.
For details about configuring this functionality, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-change-url-parameter-settings.html
[From Build 50.10] [#463741]

Exporting Reports
You can now save the Web Insight reports or HDX Insight reports in PDF, JPEG or PNG format on your local computer. You can also schedule the export of the reports to specified email addresses at various intervals.
For more information, see http://support.citrix.com/proddocs/topic/ni-10-5-map/ni-export-report-con.html.
[From Build 50.10] [#320860]

For debugging an issue, the technical support bundle that you generate to send to the technical support team now automatically includes NetScaler ADC data along with the NetScaler Insight Center data.
You can also choose to include the debug logs and data distribution logs.
[From Build 50.10] [#474070]

NetScaler Insight Center now supports monitoring of CloudBridge 2000, 3000, 4000, and 5000 appliances. It analyzes the ICA traffic flowing through the CloudBridge appliances and generates HDX Insight performance reports. With this feature, datacenter administrators can gather information about traffic flowing between XenApp/XenDesktop clients and XenApp/XenDesktop servers.
[From Build 51.10] [#430880]

NetScaler SDX Appliance

Improved Dashboard
NetScaler SDX provides an improved Dashboard. The new Dashboard provides a compact and a better view of key parameters. The fields that are displayed in the Dashboard are not user configurable.
[From Build 50.10] [#437995]

XenServer IP Address Support in Network Configuration Utility
Now you can use the network configuration utility to assign both the Management Service IP address as well as the XenServer IP address on a new appliance.
[From Build 50.10] [#437974]

Monitoring and Managing Real-Time Status of Entities Configured on NetScaler Devices
You can use NetScaler SDX to monitor and manage the states of virtual servers, services, service groups, and servers across the NetScaler virtual appliances hosted on SDX. You can monitor values, such as the health of a virtual server and the time elapsed since the last state change of a service or service group. This gives you visibility into the real-time status of the entities and makes management of these entities easy when you have a large number of entities configured on your NetScaler devices.
[From Build 50.10] [#247823, #291022]

Monitoring and Managing Events Generated on NetScaler Instances
The Events feature to monitor and manage the events generated on the NetScaler instances. The Management Service identifies events in real time, thereby helping you address issues immediately and keep the NetScaler instances running effectively. You can also configure event rules to filter the events generated and get notified to take actions on the filtered list of events.
[From Build 50.10] [#247820]

Console Access for NetScaler SDX Appliance
You can access the console of NetScaler instances, the Management Service, XenServer, and third party VMs from the Management Service interface. This is particularly helpful in debugging and troubleshooting the instances hosted on the NetScaler SDX appliance when the instance is not reachable over the network.
For more information, see http://support.citrix.com/proddocs/topic/sdx-administration-10-5-map/sdx-console-access-con.html
[From Build 50.10] [#246263]

CLI Support for NetScaler SDX Appliance
You can now use the command line interface to perform operations on the Management Service. Add, Set, Delete, Do and Save commands are supported through command-line interface.
For more information, see http://support.citrix.com/proddocs/topic/sdx-administration-10-5-map/sdx-cli-support-svm-con.html
[From Build 50.10] [#257899]

Authentication and Authorization Enhancements
With this release, the following authentication and authorization capabilities are supported for the Management Service on NetScaler SDX appliance:
- External authentication support for for the Management Service using RADIUS, TACACS,
or LDAP servers.
- Group extraction capability for LDAP and RADIUS authentication types.
- Authentication and authorization for requests through SSH. However, the authorization of
SSH users is limited to super-user privileges only.
- Audit logs for RADIUS and TACACS servers. You can enable audit logs by checking the
Accounting option while adding the RADIUS or TACACS server to the Management Service.
[From Build 50.10] [#399086]

New inline wizard for provisioning NetScaler instances with simplified networking configuration steps
You can now use the new inline wizard to provision NetScaler instances from the Management Service. The networking configuration portion of the provisioning workflow has been simplified and streamlined for ease of use. To use the inline wizard, click Configuration > NetScaler > Instances and click Add to add a new instance or Edit to modify a highlighted instance.
[From Build 50.10] [#391749]

LACP Statistics
You can now view the real time status and stats for the LACP channels configured on the SDX appliance from the Management Service. If you have added an LACP channel, you can view the LACP details by clicking on Configuration > System > Channels > LACP Details.
[From Build 50.10] [#394210]

SSL certificates and keys for NetScaler instances
Enhanced usability achieved by providing separate view for SSL certificates and keys for NetScaler instances. A new node, SSL Certificate Files, on the Management Service interface allows you to upload and manage the SSL certificates and corresponding public and private key pairs that can be installed on NetScaler instances.
Management Service certificates can be managed from Configuration > Management Service > SSL Certificates Files and NetScaler certificates can be managed from "Configuration > NetScaler > SSL Certificate Files.
[From Build 50.10] [#437973]

Wizard for Initial Configuration Setting in Management Service
You can use the Setup Wizard to complete all the first time configurations in a single flow. The wizard helps you in configuring network configuration details, system settings, changing the default administrative password, and manage and update licenses.
For more information, see http://support.citrix.com/proddocs/topic/sdx-administration-10-5-map/sdx-initial-setup-wizard-con.html
[From Build 50.10] [#384569]

Security Enhancements on NetScaler SDX Appliance
NetScaler SDX appliance now supports a configuring a password policy and a user-lockout policy to provide security against hackers and password-cracking software.
The password policy enforces a user-specified minimum length and a minimum level of complexity. The password must have at least one uppercase, one lowercase, one numeric, and one special character. The user-lockout policy disables a user-account if an incorrect password is entered a specified number of times.
You can specify the time period (user lockout interval) for how long the user account remains disabled, after which the user account is enabled automatically.
Note: User lockout is disabled by default
[From Build 50.10] [#353854]

Provisioning Palo Alto VM-Series Instances on a NetScaler SDX Appliance
Palo Alto Networks VM-Series on Citrix NetScaler SDX enables consolidation of best-in-class security and ADC capabilities on a single platform, for secure, reliable access to applications by businesses, business units, and service-provider customers. The combination of VM-Series on Citrix NetScaler SDX also provides a complete, validated, security and ADC solution for Citrix XenApp and XenDesktop deployments.
You can provision, monitor, manage, and troubleshoot an instance from the Management Service.
Note: The total number of instances that you can provision on an SDX appliance depends on the license installed on the appliance.
For more information, see http://support.citrix.com/proddocs/topic/sdx-administration-10-5-map/sdx-ag-third-party-paloalto-con.html
[From Build 50.10] [#357214]

Change Management
You can now schedule Management Service to run NeSclaer configuration difference against a template and show appropriate reporting. Further, you can use the report on the Change Management page of Management Service to view whether there is any difference between the saved configuration and the running configuration of any instance. You can click on the chart to further drill down and view the list of instances, their running configuration, saved configuration, history of configuration changes, any difference between the configurations before and after an upgrade, and any difference between the running configurations and the configuration of the associated audit templates.
[From Build 50.10] [#418165]

No change in state of shut down NetScaler instance through appliance reboot
If any of the NetScaler VPX instances are in shutdown state, and an appliance reboot is carried out then the instances which were in the shut down state continue to be in the same state through the reboot process.
[From Build 50.10] [#437979, #412103]

Provisioning support even when none of data ports are connected
When deployments are being set up, usually the interfaces are not connected. Management Service now allows provisioning of NetScaler instances on SDX with data ports as management interface even if they are down.
[From Build 50.10] [#437980]

The Call Home feature monitors your NetScaler instances for common error conditions.
You can now configure, enable or disable the Call Home feature on NetScaler instances
from the Management Service user interface.
For more information, see http://support.citrix.com/proddocs/topic/sdx-administration-10-5-map/sdx-call-home-support-con.html
[From Build 50.10] [#430105]

Management Service Statistics
A new gadget, Management Service Statistics has been introduced on the Dashboard to help you monitor the statistics such as Memory, CPU, and Disk usage, of Management Service on NetScaler SDX appliance.
[From Build 50.10] [#400698]

When system sends any e-mail notification, it will contain host name along with IP address as sender.
[From Build 51.10] [#464856]

Networking

The NetScaler ADC now supports the industry standard (EEE 802.1AB) Link Layer Discovery Protocol (LLDP). LLDP is a layer 2 protocol that enables the NetScaler ADC to advertise its identity and capabilities to the directly connected devices, and also learn the identity and capabilities of these neighbour devices.
Using LLDP, the NetScaler ADC transmits and receives information in the form of LLDP messages known as LLDP packet data units (LLDPDUs). An LLDPDU is a sequence of type, length, value (TLV) information elements. Each TLV holds a specific type of information about the device that transmits the LLDPDU. The NetScaler ADC sends the following TLVs in each LLDPDU:
* Chassis ID
* Port ID
* Time-to-live value
* System name
* System description
* Port description
* System capabilities
* Management address
* Port VLAN ID
* Link aggregation
Note: You cannot specify the TLVs to be sent in LLDP messages.
For more information, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/ns-nw-config-llayer-dics-protocol-tsk.html.
[From Build 50.10] [#235640]

Netprofile Support for Link Load Balancing Configurations
You can now associate a netprofile with a link load balancing configuration. The NetScaler ADC then uses one of the IP addresses in the netprofile as the source address for outbound traffic related to the link load balancing configuration.
A netprofile can include a NetScaler owned IP address or an IP set, which is a set of NetScaler owned IP addresses. You can associate a netprofile with link load balancing virtual servers as well as with the bound services. A netprofile associated with a link load balancing virtual server always take precedence over netprofiles associated with the bound services.
For more information on netprofiles, http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-lb-clienttraffic-usespecifiedsrcip-tsk.html.
[From Build 50.10] [#356081]

The ZebOS dynamic routing software package has been upgraded to version 7.10.2.
[From Build 50.10] [#435000]

VMAC Based Traffic Domains
You can now associate a traffic domain with a VMAC address instead of with VLANs. The NetScaler ADC then sends the traffic domain's VMAC address in all responses to ARP queries for network entities in that domain. As a result, the ADC can segregate subsequent incoming traffic for different traffic domains on the basis of the destination MAC address. The NetScaler ADC identifies traffic for a traffic domain if it is destined to the same VMAC address that is associated with the traffic domain.
For more information, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/nw-td-vmac-traffic-domain-intro-tsk.html.
[From Build 50.10] [#425108]

IPv6 Forwarding Session Rules
Now, you can create forwarding session rules for IPv6 traffic. By default, the NetScaler appliance does not create session entries for traffic that it only forwards (L3 mode). For a case in which a client request that the appliance forwards to a server results in a response that has to return by the same path, you can create a forwarding-session rule. A forwarding-session rule creates forwardingsession entries for traffic that originates from or is destined for a particular network and is forwarded by the NetScaler appliance.
When configuring an IPv6 forwarding-session rule, you can specify either an IPv6 prefix or an ACL6 as the condition for identifying IPv6 traffic for which the forwarding-session entry to be created:
- Using an IPv6 prefix . When you specify an IPv6 prefix, the appliance creates forwarding sessions for those IPv6 traffic that are sourced from networks that matches the IPv6 prefix.
- Using an ACL6 rule . When you use an ACL6 rule, the appliance creates forwarding sessions for those IPv6 traffic that match the conditions specified in the ACL6 rule.
Note: When the appliance is configured as a high availability node, Connection Failover for synchronizing IPv6 forwarding session entries with the secondary node is not supported.
For more information, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/ns-nw-interfaces-confrng-fwd-sessions-tsk.html.
[From Build 50.10] [#251234]

Support for Inter Traffic Domain Entity Bindings
You can now bind services in one traffic domain to a virtual server in another traffic domain. All the services to be bound to a virtual server in a different traffic domain must reside in the same traffic domain.
There is no command or parameter introduced for this support. You configure this support by using the existing bind lb vserver command or the related configuration utility procedure. This capability can facilitate interaction between different traffic domains. In an enterprise, servers can be grouped in different traffic domains. Virtual servers are created in a traffic domain that faces the internet. A virtual server from this traffic domain can be configured to load balance servers in another traffic domain. This virtual server receives connection requests from the Internet to be forwarded to the bound servers.
For more information, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/ns-nw-supp-traff-enty-tsk.html.
[From Build 50.10] [#405295]

A parameter Source IP Persistency has been introduced in RNAT rules and Netprofiles:
Source IP Persistency for RNAT Sessions
The source IP persistency of a RNAT rule enables the NetScaler ADC to use the same NAT IP address for all RNAT sessions initiated from a particular server.
Source IP Persistency for NetProfiles
The source IP persistency of a netprofile associated with a virtual server or service enables the NetScaler ADC to use the same address, specified in the net profile, for all sessions initiated from a particular client.
[From Build 50.10] [#437359]

Configuring Link Redundancy by using LACP channels
Link Redundancy by using LACP channels enables the NetScaler appliance to logically create sub channels from a LACP channel where one of the sub channel is active and the remaining sub channels stay in standby mode. If the active sub channel fails or does not meet a minimum threshold throughput, one of the standby sub channel takes over and becomes active.
The NetScaler appliance forms a sub channels from links that are part of the LACP channel and are connected to a particular device. For example, for a LACP channel with four interfaces on a NetScaler appliance, where two of the interface is connected to device A, and the other two interfaces are connected to device B, then the NetScaler appliance logically creates two sub channels, one sub channel with two links to device A, and the other sub channel with the remaining two links to device B.
The lrMinThroughput parameter is introduced for configuring link redundancy for a LACP channel. This parameter specifies the minimum throughput threshold to be met by the active sub channel of a LACP channel. When the throughput of the active channel falls below the lrMinThroughput , link failover occurs and one of the standby sub channels becomes active.
For example, set channel la/1 -lrMinThroughput 2000
Link redundancy for a LACP channel is disabled, which is also the default setting, when you set the lrMinThroughput parameter of the LACP channel to zero or when you unset this parameter.
Note: In an HA configuration, if you want to configure throughput (throughput parameter) based HA failover and link redundancy ( lrMinThroughput parameter) on a LACP channel, you must set a lesser or equal value to the throughput parameter as compared to the lrMinThroughput parameter.
For example, set channel la/1 throughput 2000 -lrMinThroughput 2000
HA failover does not occur if any of the sub channels meets the lrMinThroughput parameter value even when the total throughput of the LACP channel does not meet the throughput parameter value.
HA failover occurs only when the entire sub channels of the LACP channel does not meet the lrMinThroughput parameter value and the total throughput of the LACP channel does not meet the throughput parameter value.
For more information, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/ns-nw-config-lr-lacp-tsk.html.
[From Build 50.10] [#346763]

Increased Number of Interfaces for Link Aggregation Channels
You can now bind up to 16 interfaces to a link aggregation channel. The channel can be either static or LACP.
[From Build 50.10] [#437366, #389319]

Support for VXLANs
Now the NetScaler ADC supports Virtual eXtensiable Local Area Network (VXLANs). A VXLAN is an overlay solution that creates layer 2 overlay networks over layer 3 infrastructure by encapsulating Layer-2 frames in UDP packets. Each VXLAN is identified by a unique 24-bit identifier called the VXLAN Network Identifier (VNI). Only network devices within the same VXLAN can communicate with each other.
[From Build 50.10] [#366992]

ZebOS API Access
With a new configuration object, router DynamicRouting, you can use NITRO APIs to configure dynamic routing protocols on a NetScaler appliance.
[From Build 50.10] [#229714, #222015, #406589]

NetScaler MPX appliances support receiving and transmitting jumbo frames containing up to 9216 bytes of IP data. Jumbo frames can transfer large files more efficiently than it is possible with the standard IP MTU size of 1500 bytes.
A NetScaler MPX appliance can use jumbo frames in the following deployment scenarios:
- Jumbo to Jumbo. The appliance receives data as jumbo frames and sends it as jumbo frames.
- Non-Jumbo to Jumbo. The appliance receives data as regular frames and sends it as jumbo frames.
- Jumbo to Non-Jumbo. The appliance receives data as jumbo frames and sends it as regular frames.
The NetScaler appliance supports jumbo frames in a load balancing configuration for the following protocols:
- TCP
- Any protocol over TCP (for example, HTTP)
- SIP
- Radius
-TFTP
For more information, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/ns-nw-jf-overview-con.html.
[From Build 50.10] [#407504, #244274, #336389, #407861]

Optimization

Front End Optimization Support
The NetScaler ADC now supports the front end optimization feature, which reduces the load time and render time of web pages by simplifying and optimizing the content to be served to the client browser.
This feature optimizes HTML content, and the cascading style sheets (CSS), JavaScript, and images that are embedded in the HTML content.
For details, see http://support.citrix.com/proddocs/topic/ns-optimization-10-5-map/ns-feo-con.html.
[From Build 50.10] [#292039, #392818, #449669, #450295]

Platform

Release 10.5 51.x is now supported on the MPX 22040/22060/22080/22100/22120 platform, but a LOM firmware upgrade is required.
[From Build 51.10] [#471641, #471642, #472044]

Policies

Variable Support for Policies
Policy variables are named objects that can hold one or more values that can be set and modified at runtime. The concept of variables is essentially the same as in programming languages. Variable values can be of two types:
- ulong (a 64-bit unsigned integer, with values from 0 to 2^64-1)
- text (a sequence of bytes with a configured maximum length).
Additionally, there are two variable types:
- Singletons variables hold one ulong or text value.
- Maps hold one or more entries, each entry having a text key and a ulong or text value. The key can be used to find the value. In a map, more than one map entry may have the same value, but each map entry must have a different key.
For more information, see http://support.citrix.com/proddocs/topic/ns-main-appexpert-10-5-map/ns-pol-variable-con.html.
[From Build 50.10] [#368447]

Responder

Embedded Expressions in Responder Responses
You can now add Netscaler expressions with default syntax to HTML pages that are used with responder actions of the respondWithHtmlpage type. Any expression that is supported for use in a respondWith response can be used in a respondWithHTMLPage response. To embed expressions in HTML pages simply surround the expressions with "${" and "}". This functionality enables you to include information about the request that generated the Responder action in the response.
[From Build 50.10] [#423928]

The Responder feature now supports the Diameter protocol.
A number of NetScaler expressions have been added that enable the user to examine the header and the attribute-value pairs (AVPs) in a diameter packet. These expressions enable the user to look up AVPs by index, ID, or name, examine the information in the AVP, and send a response based on that information.
[From Build 50.10] [#318387]

Rewrite

The Rewrite feature now supports the Diameter protocol.
A number of NetScaler expressions have been added that enable the user to examine the header and the attribute-value pairs (AVPs) in a diameter packet. These expressions enable the user to look up AVPs by index, ID, or name, examine the information in the AVP, and replace/insert/delete AVPs if necessary.
[From Build 50.10] [#318382]

SSL

Support for ECDHE Ciphers
The Citrix NetScaler MPX 11515/11520/11530/11540/11542 appliances and the VPX virtual appliance now support the ECDHE cipher group. On the SDX 11515/11520/11530/11540/11542 appliances, the cipher group is supported only if an SSL chip is assigned to a VPX instance. This group contains the following ciphers:
- TLS1-ECDHE-RSA-RC4-SHA
- TLS1-ECDHE-RSA-DES-CBC3-SHA
- TLS1-ECDHE-RSA-AES128-SHA
- TLS1-ECDHE-RSA-AES256-SHA
Because of its smaller key size, Elliptic Curve Cryptography (ECC) is especially useful in a mobile (wireless) environment and in an interactive voice response environment, where every millisecond is important. Smaller key sizes result in power, memory, bandwidth, and computational cost savings.
The following ECC curves are supported:
- P_256
- P_384
- P_224
- P_521
By default all four curves are bound to an SSL virtual server.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-ssl-config-ecdhe-ciphers-tsk.html
[From Build 50.10] [#329257, #198673, #401256]

SSL Certificate Chain
As part of the SSL handshake, when a client requests a certificate, the NetScaler ADC presents a certificate and the chain of issuer certificates that are present on the ADC. An administrator can view the certificate chain for the certificates present on the ADC and install any missing certificates.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-ssl-display-cert-chain-tsk.html
[From Build 50.10] [#437610]

Creating an SSL Profile
You can use an SSL profile to specify how a NetScaler appliance processes SSL traffic. The profile is a collection of SSL parameter settings for SSL entities, such as virtual servers, services, and service groups, and offers ease of configuration and flexibility. Previously, you could specify only one set of global parameters. Now, you can create multiple sets (profiles) of global parameters and assign different sets to different SSL entities. SSL profiles are classified into two categories:
-Front end profiles, containing parameters applicable to the front-end entity. That is, they apply to the entity that receives requests from a client. For example, an SSL virtual server.
-Backend profiles, containing parameters applicable to the back-end entity. That is, they apply to the entity that sends client requests to a server. For example, an SSL service.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-ssl-profiles-tsk.html
[From Build 50.10] [#401011, #321967]

Importing SSL Resources from Remote Hosts
The NetScaler appliance now supports importing SSL resources, such as certificates, private keys, CRLs, and DH keys, from remote hosts even if FTP access to these hosts is not available. This is especially helpful in environments where shell access to the remote host is restricted.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-ssl-importing-ssl-files-from-remote-hosts-tsk.html
[From Build 50.10] [#210405]

Support for DTLS Protocol
The NetScaler ADC now supports DTLS protocol to secure UDP traffic. The DTLS protocol (RFC 4347), can be used to secure UDP applications such as media streaming, VOIP, and online gaming for communication.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-ssl-config-dtls-server-tsk.html
[From Build 50.10] [#400350]

Sending an SSLv2 Compliant Client Hello Message
As part of the SSL handshake with the server, the NetScaler appliance now sends a Client Hello message based on the version (for example SSLv3 or TLS1.0) that is configured on the appliance. Earlier, it sent an SSLv2 compliant Client Hello message to the server.
[From Build 50.10] [#378806, #204465, #406907]

Support for Common Name Check during Server Authentication
In end-to-end encryption with server authentication enabled, you can include a common name in the configuration of an SSL service or service group. The name that you specify is compared to the common name in the server certificate during an SSL handshake. If the two names match, the handshake is successful. This configuration is especially useful if there are, for example, two servers behind a firewall and one of the servers spoofs the identity of the other. If the common name is not checked, a certificate presented by either server is accepted if the IP address matches.
For more information, see http://support.citrix.com/proddocs/topic/netscaler-traffic-management-10-5-map/ns-ssl-config-common-name-for-cert-tsk.html
[From Build 50.10] [#381821, #332628]

SSL Renegotiation
SSL renegotiation is now blocked by default. In earlier releases, the default setting was to allow SSL renegotiation.
[From Build 50.10] [#481577]

Setting the Limit for Disabled SSL Chips
You can now set a limit to the number of disabled SSL chips after which the appliance restarts.
At the command prompt, type:
> set ssl parameter -cryptodevDisableLimit <positive_integer>
A chip is marked disabled after the third failed reinitialization attempt.
[From Build 50.10] [#376153]

System

SNMP V3 Support for Traps
Trap class, destination along with version will now act as unique identifier for a trap destination. This will allow configuration of same destination with different versions. All commands will take version V2 as default value. Set and Unset commands can no longer change version.
[From Build 50.10] [#416930]

Explicit Congestion Notification (ECN)
The NetScaler appliance now supports ECN, which sends notification of network congestion state to the sender and takes corrective measures for data congestion or data corruption. When ECN is enabled, the NetScaler automatically differentiates between corruption loss and congestion loss. The NetScaler implementation of ECN is RFC 3168 compliant.
ECN must be enabled on the TCP profile to which you want it to apply.
To enable ECN using the CLI:
> add ns tcpProfile <name> -ecn ENABLED
[From Build 50.10] [#249145]

TCP Timestamp based on RFC 1323
The NetScaler now provides the TCP timestamp as detailed in RFC 1323. Using this timestamp, the NetScaler can provide the Round Trip Time Measurement (RTTM). For this option to work, at least one side of the connection (client or server) must support it.
[From Build 50.10] [#204374, #249144, #317249, #401162]

SNMP Trap for Port Allocation Failures
NetScaler ADC sends SNMP trap when port allocation fails on the NetScaler. The following SNMP OID is added: dstip (1.3.6.1.4.1.5951.1.1.0.143)
[From Build 50.10] [#360334]

Restrict Interface-level System Session Timeout
The system session timeout for a specific NetScaler interface (GUI, CLI, API) is now restricted to the timeout value that the administrator has configured for the user that is accessing the interface. For example, let us consider an user "publicadmin" who has a timeout value of 20 minutes. Now, when accessing an interface, the user must specify a timeout value that is within 20 minutes.
For more information, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/ns-sys-session-timeout-tsk.html.
[From Build 50.10] [#405501, #439031]

Application Layer Protocol Negotiation (ALPN) Extension support
The NetScaler now supports the APLN extension for negotiating the SPDY protocol over SSL/TLS. The use of ALPN provides higher rate of TPS performance on the NetScaler. APLN replaces the previous method of NPN (Next Protocol Negotiation).
[From Build 50.10] [#430862]

When the configured external authentication server is not available, the NetScaler can be configured to allow local user access to perform administrative tasks. To enable this function, enable the "localAuth" parameter of the "set system parameter" command.
[From Build 50.10] [#315474]

MPTCP Enhancements
The NetScaler now supports the following MPTCP enhancements:
- One RTT subflow setup
- Long-lived MPTCP sessions
- MPTCP fast open
[From Build 50.10] [#435632]

SPDY v3 Support
The NetScaler appliance now supports SPDY v3 with Application Layer Protocol Negotiation (ALPN).
[From Build 50.10] [#329669]

NetScaler support for D-SACK AND F-RTO
The NetScaler appliance can now detect spurious re-transmissions by using TCP duplicate selective acknowledgement (D-SACK) and Forward RTO-Recovery (F-RTO). In case of spurious re-transmissions, the congestion control configurations are reverted to their original state. The NetScaler implementation of D-SACK is RFC 2883 compliant and F-RTO is RFC 5682 compliant.
D-SACK and F-RTO must be enabled on the TCP profile to which you want it to apply.
To enable these settings by using the CLI:
> add ns tcpProfile <name> -dsack ENABLED -frto ENABLED
[From Build 50.10] [#439129]

Differentiated services code point (DSCP) Support
The NetScaler ADC can now retain and forward received DSCP code in end-point mode. This capability supports end-to-end quality of service (QOS) checks for load balanced traffic.
[From Build 50.10] [#436946]

NetScaler now supports BIC and CUBIC TCP congestion control algorithms.
[From Build 50.10] [#406270]

Traffic Domain

Features Supported in Traffic Domains
The following NetScaler features are now supported in all traffic domains configured on a NetScaler appliance:
* RNAT6
* IPv4 and IPv6 Forwarding Sessions
* NAT64
* NAT46
You can use the new Traffic Domain (TD) parameter to specify or identify a traffic domain in commands and GUI elements related to these features.
For more information, see http://support.citrix.com/proddocs/topic/ns-system-10-5-map/nw-td-supportd-unsupportd-ns-featurs-con.html.
[From Build 50.10] [#383056]

You can now configure rate limiting for traffic domains. The following expression has been added to the NetScaler expressions language for identifying traffic associated with traffic domains.
client.traffic_domain.id
You can configure rate limiting for traffic associated with a particular traffic domain, a set of traffic domains, or all traffic domains.
For more information, see http://support.citrix.com/proddocs/topic/ns-main-appexpert-10-5-map/ns-nw-ratelimit-td-con.html.
[From Build 50.10] [#403748]