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?