N        This expression returns the port that the server is hosting on, set when you use the Relay Server > Host action.

The port is a number between 1 to 65535, inclusive, and by default Lacewing Relay Protocol hosts on port 6121.

When the server is not hosting, this expression will return -1.


This expression is not for the flash policy server, which always hosts on port 843 as per Adobe's policy.