ICQ on Port 80 and 4000

Gurus,
    I am trying to block people in my organisation to use ICQ & WebICQ . What should I do on the firewall ?

1. Assume the ICQ using HTTP protocol to communicate, and I would like to block any URL containing string such as icq.com/icq (please note that I may not know the whole URL), which product do I need? WebShield or IntruShield?


So, with that policy, Should I  block the following address:

login.icq.com

Server1.icq.com/icq

Server2.icq.com/icq/folder1/

And more, but with one rule…



regards,
Nick
nicotine1Asked:
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lrmooreCommented:
Can you be more specific on what kind of firewall you have?
Do you perchance have a Cisco router in front of the firewall? If yes, you can use NBAR.
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