Wednesday, November 10, 2004

ISA Server 2000 Spoofing fix (888258)

Just an early warning from me - I've just installed this security fix in two completely different customer environments (and different OS'es - Windows 2000 and Windows 2003) and both of them had to be rolled back. During installation/test there are no problems, but under load the Web Proxy will repeatedly terminate "unexpectedly" and no in or outbound web acces will work. The solution was to uninstall the hotfix on both systems (And one of them actually required me to visit the customer on-site at 04:30 AM) - for now I recommend you to test the patch extensively in your environment and/or use the workaround published at http://support.microsoft.com/kb/889189.

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