oidentd can handle Ident queries for other machines connecting through the server it is running on. This is especially useful when the server running oidentd performs Network Address Translation (NAT).

Before configuring oidentd to use NAT, please take a look at the file in the source tree to find out whether NAT is supported on your system.

oidentd supports two features that may be useful in combination with NAT:

  • Static replies instruct oidentd to send a certain reply in response to every Ident query intended for a particular host or subnetwork.
  • Forwarding allows Ident queries to be forwarded through NAT to the host that established a connection.