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IAS fails to start - reports port in use

Posted on 2008-10-17
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Last Modified: 2012-05-05
A number of Windows2003 server have recently restarted after windows updates and the IAS service fails to start. The event log states that a port is already in use. By modifying the IAS server to support only 1812 and 1813 (removing 1645,1646) the service starts.
Has anybody else experienced this? Is it related to a new Windows Update?
The servers all run McAfee VirusScan 8.5 patch 5 also.
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Question by:ImexTechnical
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by:Alan Huseyin Kayahan
ID: 22746511
Hi ImexTechnical,,
     I have twice encountered this. If you have Cisco ACS or TACACS installed in same server with IAS, you can encounter this problem. Second was weird that I tracked the port to process usage and found that DNS Server service was using that port. I stopped DNS Server service, started IAS service, then started DNS Server back

Regards
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FiveNines earned 125 total points
ID: 23416763
"The Internet Authentication Service service terminated with the following error:
Only one usage of each socket address (protocol/network address/port) is normally permitted."

You may see the above in the logs.
One of the recent updates allows DNS to use a large port range, including 1645-1646.

Here is the fix:  http://support.microsoft.com/default.aspx/kb/812873/
Just reserve the IAS ports above, reboot the server and you are good to go.


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