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How to Stop messanger services on proxy?

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Hi,
I network administrator for an education instiute. We have lease line 128 KBPS. and my major bendwidth is used by messenger services like yahoo, MSN, Rediff Bol etc...
How I cam block that services on my proxy server. I am using IIS-4 andMS PROXY on my server. I have already tried to block "pager.yahoo.com" in web proxy's security options.

Praful Joshi

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by curlergirl

If you turn on packet filtering, you will be able to control what ports are open or closed. Just turning on packet filtering with the basic settings should fix your problem. You can do this by opening the Proxy Console, right click on Web Proxy, click Properties, click the Security button and click the checkbox labeled "Enable dynamic packet filtering". If it's already enabled, then make sure that there aren't any exclusions for ports that are used by IM.

Hope this helps!

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