Blocking IM

I've got AOL IM and Windows Live Messenger blocked with a DNS spoof but can't block Windows Messenger the same way. Apparently the older Windows Messenger remembers the last IP address it used to connect so there is no DNS lookup when it launched if it was ever able to connect.

Does anyone know a way to block "Windows Messenger" with the PIX?

A few comments; I'll be doing Yahoo IM next so if you want to comment on that feel free. Also I could block the MS .NET Passport logon preventing Windows Messenger from authenticating but we do have some legitimate uses of Passport. Just in case someone else misses it, I did at first, AOL also has a web page for AIM so be sure to block that as well.

Thanks all RC

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i wish this links help you:

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RC wrote:

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