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Blocking MSN on ISA Server

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by farrukhms

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Hello All,

Can anyone help me in blocking MSN & Yahoo Messengers on ISA Server. I block HTTPS protocol on ISA to block both these services but their login webpages are also disabled in this way. Please help.

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by techierob

I had the same problem. Fortunately you are half way there. Basically what I did was block the ports that these services use, then by using group policy I added the executable files for MSN and YIM to the list of disallowed applications. I still have a smart ass employee who uses the web to get around that, but I am halfway through a script that will only allow traffic to be broadcasted locally from port 8080 (proxy) and 25 (smtp) :-)

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