ASP.Net error: The Local Security Authority cannot be contacted

iis-6

I had a working asp.net site under development on IIS6 and Server 2003, and then something changed. I reset IIS and now I am getting the error message

The Local Security Authority cannot be contacted 

The IIS logs show the return code as 500 0 2148074244

I have no idea what happened, but there is nothing in any of the logs indicating why. Does anybody have any ideas?

Best Answer

The problem was with the app pool identity. Somehow the service account name lost its domain.

The app pool was running as app_svc when it should have been running as domain\app_svc.

When the domain\ was added back to the service account name, everything started working again.