> Where fxp0 is your outside interface, and 192.168.0.2 is the inside
> machine running ICQ.

what about more machines running ICQ?
 
> In ICQ, Under Preferences->Connections->Server, pick "Using firewall,
> not using proxy" (If you're allowed to NAT out)
> 
> Under Preferences->Connections->User, pick "Advanced users, Not using
> proxy, use the following TCP listen port for incoming event - From 5900
> to 5915" (Or as many as you care to open.
> 
> ICQ is a security risk though - it has had several buffer overflows, so
> don't blame me if your drive gets formatted after following these
> instructions... ;-)