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Netmeeting & chat

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by aben16 Dec 9, 2002 last reply Dec 15, 2002

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Hi.
How may I prevent people from using netmeeting and chat? Which ports do I have to block?

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I would like to block MSN messenger, Yahoo messenger and ICQ.

MSN chat typically uses 1863.
ICQ: 5190
Netmeeting: 1503 and/or 1720

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Hi everybody.
I was able to block msn messenger, Icq and aol istant chatting but not yahoo messenger.
How can I block yahoo messenger?

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