Ports used for High Availability

NetScaler HA relies on a set of services which in turn use specific ports. Heartbeats are sent over UDP port 3003. Propagation and synchronization use TCP ports 3008 and 3009 or 3010 and 3011. The following is a list of the ports when RPC is enabled and when it is not enabled:

• If secure RPC is enabled:

  • 3008 for synchronization

  • 3009 for propagation

• If secure RPC is not enabled:

  • 3010 for synchronization

  • 3011 for propagation

For file synchronization for certificates, TCP port 22 is used.

Note

RPC communication can be secured (secure RPC) using the set rpcnode command. By default, it is unsecured, so TCP ports 3010 and 3011 are the ones used.