Configure DNS recursion on Citrix NetScaler

Before you begin

Note the IP addresses of the ETP recursive DNS servers. For more information, see View DNS server information.

Complete one of these procedures to configure a recursive DNS server on Citrix NetScaler. You can configure DNS recursion on the NetScaler graphical or command line interface.
Note: In NetScaler, DNS recursion applies to a local DNS server configuration only. This functionality is not available in an Authoritative Domain Name Server (ADNS) configuration.

Graphical user interface

How to

  1. In the navigation menu, click Traffic Management > DNS.
  2. Click Change DNS Settings.
  3. In the Change DNS Settings dialog:
    1. Select Enable recursion.
    2. To enable caching, select Records caching.
    3. Click OK.
  4. In the expanded navigation menu for DNS, select Name Servers.
  5. Click Add.
  6. In the Create Name Server dialog:
    1. Make sure that IP address is selected.
    2. In the IP Address field, enter the IP address of the primary ETP recursive server.
    3. Select Local.
    4. Click Create.
  7. To add the secondary ETP recursive server, repeat steps 5 and 6.
  8. Repeat steps 5 and 6 to add a recursive DNS server that will resolve requests if NetScaler cannot reach ETP.

Command line interface

How to

  1. Establish an SSH connection to the NetScaler appliance.
  2. To configure an ETP DNS server as a DNS nameserver, enter this command and press Enter:
    add dns nameserver <IP address> -local

    where <IP address> is the IP address of the ETP recursive DNS server.

  3. To enable DNS recursion, enter this command and press Enter:
    set dns parameter -recursion ENABLED -cacheRecords YES
  4. Repeat step 2 to add a recursive DNS server that will resolve requests if NetScaler cannot reach ETP.