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Event ID: 21100 Source: MicrosoftFirewall

Level
Description
ISA Server has encountered an error while loading the RADIUS Server List. The error was encountered while loading information for the RADIUS Server named <name>.
Comments
 
I installed ISA 2004 as a stand-alone server and configured RADIUS server for authenticating Web Proxy clients. I used the computer name for RADIUS and got this warning, I changed the computer name to the RADIUS serverís IP address, restarted ISA, and the warning did not reappear.
From a newsgroup post: "In my case, the problem appeared because the NETWORK SERVICE did not have bypass traverse checking rights".

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