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WinXP can't login to NT DC via TCP only

By JAStillwell ·
Hi,

One of my client's has a Windows NT SP6 Server with both NWLink and TCP loaded. Trying to get a new laptop to join the domain via TCP gets a message that the domain is not available.

Adding NWLink to the WinXP client allows access to the domain.

I would prefer to get rid of the old Novell protocols, as we have gotten rid of all the old Novell servers, in addition to just wanting to have TCP only on the network.

What should I check on the server to make sure that clients can login to the domain via TCP?

Thanks in advance!

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by JAStillwell In reply to WinXP can't login to NT D ...

Point value changed by question poster.

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by Joseph Moore In reply to WinXP can't login to NT D ...

Is your NT4 PDC and the XP boxes on the same Class C subnet?
If not, then the XP boxes will not be able to find the old-style domain controllers. XP wants to use DNS to find SRV records for domain controllers.
When there is no Active Directory (and DNS) to do all of this, it will eventually fall down and do a broadcast to find a domain controller with NetBIOS over TCP/IP.
This only works when everything is on the same Class C address space, i.e. 192.168.1.0.24

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by Joseph Moore In reply to

If you need to keep the PDC and the XP boxes on different subnets, then you will need to use the LMHOSTS file trick to force authentication. This Technet article tells you what to do:
http://support.microsoft.com/?kbid=180094

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by JAStillwell In reply to

This is a small network of 15 users and 1 server. They are all on a 10.0.0.x subnet. Any other ideas?

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by Duster52 In reply to WinXP can't login to NT D ...

As silly as this may sound...Have you confirmed that you don't have an incorrect IP address, mask or gateway on the laptop? And that it is in the same workgroup?

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by JAStillwell In reply to

Thanks, but all the other IP traffic works fine (Internet, email, etc.).

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by duwaned In reply to WinXP can't login to NT D ...

Hi. Check that the XP workstation is not trying to encrypt all traffic between itself and the server, as the NT 4 server will not be able to talk to the XP client if this is the case.

To check this, open the administrative tools (from control panel) and start up the Local security settings shortcut. Expand on the left to the following location:
Security Settings - Local Policies - Security Options. Click this item with your mouse so you can see all the policies in the right hand column. Find the entry that says "Microsoft Network Server: Digitally sign communications (Always)". Ensure this setting is set to disabled. I think the default is set to always. Hope this helps.
Regards.
Duwane

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