How to configure an ISA Server computer for a very large number of authentication requests

Most performance related problems with the ISA Firewall are due to DNS misconfiguration or disabling Path MTU Discovery. However, if you have a busy ISA Firewall in a large enterprise environment, authentication might be slowing down your ISA Firewall. If your ISA Firewall has to do with a lot of authentication requests, you can significantly speed up the Firewall by following the directions in this KB article:



Thomas W Shinder, M.D.


Email: [email protected]

MVP — Microsoft Firewalls (ISA)

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