NOTE: These instructions apply only if you are using Wingate 2.X or another proxy-based program.
They do not apply if you are using ICS, Sygate, or any other NAT based sharing program or hardware router.
ICQ, IRC and other forms of chat usually require that a mapped TCP or UDP link be set up.
Check this page for ICQ Wingate setup info from Wingate. However, there is better info here. (Thanks to Maurits Bloos for letting us copy it.)
Check this page for IRC Wingate setup info.