Allow Windows Live Messenger

Unanswered Question
Sep 12th, 2008

Hi Guys !

Can anybody guide me as to how do I allow Windows Live Messenger 8.5 and beyond on ASA 5520?

I have this problem too.
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That is not a complete port list - in the versions of Messenger from 7.5 up - if you are blocking ports, they WILL default to http/https.

If you already allow tcp 80/443 - it will work. That is what makes it so difficult to block in the first place. If you want to block in the future - at layer 4 is not enough, you have to block at layer 7.


braulio.santos Sun, 09/14/2008 - 21:50


With the link than u sended can i block msn, is more complex but works!!!!


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