ICQ on Port 80 and 4000

    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:




And more, but with one rule…

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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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