ISA 2006 Intermittent Denial of authourized URL by Web Publishing Rule
Posted on 2009-02-12
We have a standard ISA 2006 server running on a Server 2003 platform with a Core II Duo processor and 2GB of RAM.
The ISA is used mainly for web publishing and we run a number of web sites behind the ISA server. This has been running and stable for the lats 2 years,
Problem: We have new domain which has been registered as a Public Name in the usual way. However the ISA Server intermittently denies the URL with the following error:
Error Code: 403 Forbidden. The server denied the specified Uniform Resource Locator (URL). Contact the server administrator. (12202)
Based watching the logging reports the URL is denied by the [Enterprise] Default Rule. This seems to indicate that the URL has bypassed all other rules IE not been applicable - and then has been stopped by the final rule.
However sometimes the Web Publishing Rule works and the site comes up normally. Then after a few mins of browsing the site the above error pops up.
I have also linked another test URL to the same IIS site and published its Public Name and it works fine!
We have tried everything, Recreated the site in IIS. Mapped different content and added and removed the Public name a hundred times. Just when it seems to be running OK again, bang! the error pops up again.
Please can someone help.