Remote Desktop, XP SP3 to Windows 7, can only connect once between restarts
I am running Remote Desktop 6.1.7600 on Windows XP sp3 and am only able to connect to a particular Windows 7 computer on the same domain once between restarts of the XP machine. I am in the admins group on both machines. I have enabled CredSSP on the XP machine. I have downloaded and installed the RDP version 7 Hotfix on the XP machine. Both firewalls are completely disabled. If I connect to the Windows 7 machine once I have to restart the XP machine before I can do it again. If I do not restart the XP machine I am repeatedly prompted to reenter my domain password without successful login. Sometimes I get a 0xC00002fd 'an authentication error has occurred' error. I am able to connect to the Windows 7 box using Dameware MRC without any problems. I also do not have any problems connecting to other XP machines in the domain. Any suggestions?
November 12th, 2010 1:19pm

Which network device is used to connect the Windows 7 computer and Windows XP SP3 computer? Is Network Level Authentication for Remote Desktop enabled in Windows 7? Please disable Network Level Authentication for Remote Desktop and let us know if the issue still occurs. To do so, right Click on "Computer"->"Remote Settings"->"Allow connections from computers running any version of Remote Desktop"Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
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November 16th, 2010 2:26am

Hello Arthur, I'm not sure exactly what you mean by "which network device is used to connect" but I am using a standard local area connection with a wired ethernet card which allows me to connect to any XP machine in my domain via RDP. NLA is enabled in Windows 7. I can change this temporarily using the group policy editor (by setting it to 'not configured') but apparently there is a domain group policy that changes it back. This leads me to believe that server administrators would like to use NLA, so it is my goal to get this to work if possible. When I disable NLA on Windows 7 I am able to connect from XP using RDP repeatedly and with no difficulty. When NLA is enabled on Windows 7, I can log in once only from XP, then I have to reboot the XP machine to do it again.
November 16th, 2010 12:24pm

Do you connect the computers into a router or switch? What is the model? Is there any authentication function in the device? Also I suggest you replace the router or switch with another model if it is possible and let us know the result.Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.
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November 18th, 2010 2:00am

I'm sure there are routers and/or switches involved. The institution I work for is large. I'm afraid, however, I don't know specifically where my ethernet packets go once they travel through the ethernet port in the wall. I would think though, that if cached authentication built into a router was the problem I would not be repeatedly prompted for a password. At any rate, the best I can do is connect the two machines together with a null modem ethernet cable but I would think this would eliminate authentication on the domain. I did find note of someone experiencing the same problem on Vista, but no resolution at: http://social.answers.microsoft.com/Forums/en-US/xpnetwork/thread/7d9de5e5-c30c-44e3-86a5-62fbecc13003
November 23rd, 2010 3:16pm

Our final solution was to disable network level authentication on the Windows 7 boxes and get rid of the CredSSP changes on the XP machines. We did have to jump through some hoops to get NLA disabled on the Windows 7 boxes. We had to explicitly disable it using a domain wide group policy because apparently some other group policy enabled it as a side effect (possibly a terminal services gpo). We could turn off NLA locally on the Windows 7 boxes but it kept coming back on and no one could figure out why. However, once we got the NLA permanently disabled on Windows 7 and CredSSP disabled on XP everything works beautifully.
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December 8th, 2010 12:00pm

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