IIS 6 on a Windows 2003 Server. Additional components are FastCGI/PHP 5.2. My websites will load perfectly for a time. Usually at least once a day though the websites become unavailable, the error that IIS reports is HTTP Error 401.1 - Unauthorized: Access is denied due to invalid credentials. I will restart IIS and everything will start working again.
Because it is intermittent I am not sure where to start. Any ideas would be appreciated.
HTTP Error 401.1 - Unauthorized: Access is denied due to invalid credentials.
Internet Information Services (IIS)