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Error 64 — RPC/HTTP through the ISA Firewall - It’s not the Firewall’s fault - Case 669874521

An external user is unable to connect to the Exchange 2007 RPC/HTTP Web site. But internal users are able to. Clearly, the problem is with the ISA firewall, right? WRONG. Remember, in over 99% of cases when the ISA firewall is correctly configured, it’s not the firewall’s fault — it’s something else causing the problem.

Check out this article by Yuri Diogenes that explicates the problem with the Exchange CAS that caused a situation that made it look like an ISA firewall issue.

http://blogs.technet.com/yuridiogenes/archive/2009...6.aspx

HTH,

Tom

Thomas W Shinder, M.D., MCSE
Sr. Consultant / Technical Writer

image
Prowess Consulting www.prowessconsulting.com
PROWESS CONSULTING | Microsoft Forefront Security Specialist
Email: tshinder@isaserver.org
MVP — Forefront Edge Security (ISA/TMG/IAG)

This entry was posted on Thursday, January 29th, 2009 at 11:01 am and is filed under ISA Central. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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