ISA in SBS - yes, it's secure

A central location for SBS ISA specific configuration information relevant to small consulting practices and others smart enough to use the best technology in the world.

Lingo - The Talk of Broadband

Friday, March 11, 2005

Blocking Dangerous Instant Messenger Applications

So many small (and otherwise) businesses have employees abusing Instant Messaging at work these days that many of us are being asked to block IM. If you'd like to know how to prevent these applications from functioning using ISA take a look at Tom Shinder's excellent article over at

How to Block Dangerous Instant Messengers Using ISA Server

Note that in Tom's article he recommends changing the HTTP redirector settings to Reject HTTP Requests from Firewall and SecureNat Clients. This may not be the best thing for SBS users so be careful and test this recommendation if you decide to implement that portion. The information in the article prior to this point should be sufficient to thwart most IM applications.


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