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Urgent - Can connect to Win2k3 server from WAN but not from its own subnet.

Posted on 2008-10-23
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Last Modified: 2012-05-05
I've got a Windows 2003 network with WinXP machines running perfectly at one of my sites, Site A. I've  now installed a domain controller at Site B. The replication is working perfectly. Both Servers are Global Catalogues, and I can ping the new server from everywhere.
If I try to connect to the server using RDP from Site A I can get it, but from Site B I cannot, even though it is on the same subnet. Also, a PC imaged and working at Site A, when moved to Site B says it can not find a machine account, although it is able to find a user account.
What is going on? How come I can't access a server on the same subnet, even when using the IP address?

Thanks
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Question by:silent_waters
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Expert Comment

by:WideAreaMedia
ID: 22786504
Do you have multiple interfaces on the server? Make sure that the Windows Firewall service is either stopped or properly configured on all interfaces. Make sure that NetBIOS over TCP is enabled on the internal interface.

If you have a compliance system such as Symantec Endpoint Protection, ensure that the second subnet is trusted within Server B's firewall policy.
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Author Comment

by:silent_waters
ID: 22786633
Thanks very much for getting back to me so quickly.

I do have two NICs installed, but one of them is disabled.
Enabling NetBIOS doesn't help, and I've completely disabled my firewall to make sure it isn't that that is the problem.

Is there anywhere else that I could look to make sure Server B is not blocking it's own network?
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Author Comment

by:silent_waters
ID: 22786691
Another Symptom: WDS is installed on both servers, and it works perfectly at A, but at B it freezes after booting to the boot image but before offering the options for loading an image. The WDS servers are replicated using DFSR and I've been over the settings and they are identical.

It's as though ther server is randomly deciding which requests to respond to and which to ignore.
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Author Comment

by:silent_waters
ID: 22787075
DCDIAG and NETDIAG both run with no errors.
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Accepted Solution

by:
silent_waters earned 0 total points
ID: 22866759
Reinstalled the Server from scratch WITHOUT using the Dell installation assistant disk, and it all works perfectly. Don't know what the problem was but that is the last time I use any Dell utilities. Thanks for your help though.
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