pix and irc and icq

[admin_2]

how to prevent users in a campus from using chat programs with a pix firewall. Do you know the ports of icq and irc.

[#2]

The ports are as follows

IRC is TCP 6667

If you have a look at the following url this has the information for ICQ

http://www.icq.com/icqtour/firewall/netadmin.html

The main port number is TCP 5190

but they do use dynamic ports.

[yusuff]

common chat ports you can block:-

tcp 6667 (irc) 6660- 6670 (the default being 6667).

tcp 6665-6669 (common IRC)

tcp 5190 (aol)

tcp 5190, dyn >=1024 (aol ICQ)

tcp/udp 5190-5193 (aol)

tcp 1863 (msn)

tcp/udp 4020 (ichat)

tcp 5000-5001 and udp 5000-5010 (Yahoo voice chat)

tcp 5050 (Yahoo messages)

tcp 5100 (Yahoo Webcams)

HTH

R/Yusuf