We have a FAS270 online here. It has been working fine for months. About a week ago it randomly started asking for username and password when you type \\xxx.xxx.xxx.xxx (its IP address) in run. It will not accept any username or password. No GPO has changed, settings or anything. When this happened a week ago it went on for about an hour or so and just stopped and started working correctly again. Then today it started again, but now it has gone on for hours and is still happening.
If I look in the CIFs-Session Report there are about 4 computers that can access it without user name and password.
For some background....Our users are running windows XP, servers are windows server 2003. The FAS270 is on the domain and DNS/AD look fine.