we have 2 problems and i think they are symptoms of the same underlying problem because both seem to happen around the same time as each other. occurrences are random. both problems happen on a windows server 2003 running Terminal Services and hosting a sharepoint wss 3.0 web front end. all servers in the network are up to date on patches.
problem1: new RDP sessions on the server are denied with a message that the RPC server is unavailable. current RDP sessions are not disconnected.
Windows cannot determine the user or computer name. (The RPC server is unavailable. ). Group Policy processing aborted.
problem2: sharepoint dies. Event log shows:
SQL database login failed. Additional error information from SQL Server is included below.
Login failed for user 'NT AUTHORITY\ANONYMOUS LOGON'.
sharepoint databases are hosted on another server running sql server 2005.
we initially thought this was a problem with a switch because on several occasions, the problem was resolved by power cycling the switch. we replaced the switch yesterday and the problem happened again today.
i don't think the issue is sourced in sharepoint because of the coinciding issue with RDP on that particular server. i think, for some reason, there is a loss of connectivity with the domain on this 1 server.
the domain controller is on another server running Windows Server 2000. that server is not losing network connection -- we run a database app off that server and it does not have any issues. if the DC were failing in some way or had some kind of network issue, then the database app would lose connection. there are no errors in the DC Event log. moreover, i am able to RDP to other servers on the domain when the problem is happening with the server running Terminal Services, which tells me the domain itself is healthy when the problem is happening.
any ideas on what is going on?