you can reply to the sender with the hostname and
port of your key agreement server with this command.
+ If the hostname and port are ommitted, the irssi
+ boolean variable use_auto_addr will be examined. If
+ this variable is set, the value of auto_bind_ip will
+ be used as the IP address to listen for the return
+ reply, the value of auto_public_ip will be the IP
+ address sent to the remote client, and auto_bind_port
+ will be the port value to be bound to AND sent to
+ the remote client. If auto_public_ip is unset, but
+ auto_bind_ip IS, irssi will send the auto_bind_ip
+ variable's value to the remote client.
+
negotiate [<hostname> [<port>]]
This may be called to start the key agreement with