I have a virtual server running Windows Server 2008 r2 onto which I have installed Windows Sharepoint Services 3. My SQL server is also a VM running MSSQL 2008 on Windows Server 2008 r2. I am using windows authentication NTLM.
I restored the site collection from an old Farm using Stsadm and all works fine... except that every so often, when I try to access the site, it gives me the message...
403 - Forbidden: Access is denied.
You do not have permission to view this directory or page using the credentials that you supplied.
Trying to access the Default.aspx also fails with a 401.
About 15-30 minutes later it will be working again. Then it will stop again and the cycle repeats.
It is driving me mental. Any ideas?
You might try resetting the admin password, and verifying the ID the app pools are using.