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RDP doesn't work after upgrading to Windows 7 64bit

Posted on 2010-11-25
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Last Modified: 2012-05-10
I used to RDP to my machine at home without problems from my PC at work.
I have just been given a Windows 7 x64 machine as part of the pilot for our hardware refresh.

Strangely, I can now no longer RDP to my home machine, Win7 Ultimate 64bit.
To make it odder still, users on Win7 32bit and XP can still RDP to my machine fine.

Some of the MSTSC settings are locked down via Group Policy, but I have full access to the registry. It would however be bad form to move myself to another OU to avoid the GPs that lock down the MSTSC setings.

Any ideas anyone?
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Question by:LPetersson
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by:Iain MacMillan
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are you saying 32bit systems can RDP to your home system, or just your 64bit LAN system ok??

I assume that port 3389 is open on both systems (as 7 has 2 firewalls) and your are trying to connect home using your external router IP?  On the RDP client, on the Advanced tab, do you have the Server Auth set to Connect & Don't Warn and under Connect from Anywhere to do not use RD server?

I would also de-select IPv6 from your NIC too.
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by:LPetersson
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32 bit Windows 7 and XP can RDP to me home system which is Windows 7 ultimate 64 bit, yes.

The port is open and Windows' firewall has been disabled on all the machines. I have de-selected IPv6 but forgot to mention this in my post.

MSTSC is set to Connect and don't warn me.
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by:Iain MacMillan
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and the Connect from Anywhere option??  what do you have that set to?
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by:LPetersson
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Where is the 'Connect From Anywhere' option?

It doesn't leap out at me when I look at the settings in MSTSC => Options...
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by:Iain MacMillan
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bottom half of the advanced tab.......under Server Authentication.
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by:LPetersson
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Ahh, the gateway settings, I have tried each of the 3 radio buttons, but since I don't have any credentials, the middle one doesn't accept usage.

The Win7 32bit machine that can connect fine uses the 'Automatically Detect' option.
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by:RootsMan
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What is the error message received when you fail to connect?
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by:LPetersson
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This is the error I get:

---------------------------
Remote Desktop Connection
---------------------------
Remote Desktop can’t connect to the remote computer for one of these reasons:

1) Remote access to the server is not enabled
2) The remote computer is turned off
3) The remote computer is not available on the network

Make sure the remote computer is turned on and connected to the network, and that remote access is enabled.
---------------------------
OK   Help  
---------------------------


As I wrote above, Win7 32bit and XP 32bit clients can connect fine, so the computer is on and the router is forwarding packets...
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by:wjcott
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I would check whether the new client can interact with your home client first (ping home IP address)

If you are able to ping your home IP address, I would then attempt a telnet to the RDP port ("telnet <home IP address> 3389"). If you are able to connect to the port, you should get a blank command line window.
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by:M. Rashel Ahmed
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by:LPetersson
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wjcott/raselaiub: If you had read the question properly and the various comments you would see that I can connect fine from other clients on the same network. In fact, right now I'm RDP'ing to the machine next to me and RDP'ing from that to my home machine.
The problem doesn't lie at the receiving end...
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LPetersson earned 0 total points
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I haven't been able to figure it out and neither has anyone else...

Odd, but hey ho, I get around it to RDPing to a Windows XP machine and then RDPing to my home machine...

Most peculiar, but not worth more of my time right now.
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by:Iain MacMillan
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its a strange one, as i use RDP to get to my home system which is Win 7 Pro 64bit, same as my office system, and mine is working fine, though my work system has some modifications such as Autotune disable, Windows Scaling disable and CTCP enabled, IPv6 and Flow Control disabled on the NIC and any IPv6 settings.
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by:Iain MacMillan
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i would also suggest using the IP address of your remote system, rather an any names, see if that helps and check the RDP Settings one more time (i also found leaving my home system logged in with active session helps):

1- uncheck the TCP/IP v6  
2 - In options of remote desktop,  tab ADVANCED,  change the server authentications for : Connect and don't warn me.  
3 - Just below, in connect from anywhere, Settings...  select : Do not use an RD Gateway server.

64 bit RDP does appear to have some issues, but 32bit doesn't, might be fixed in a patch or the upcoming SP1 - check your system patches at both ends.  I have also recently just added .Net 4.0 client at both ends incase that alters anything.
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by:LPetersson
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I accepted my own solution because it was the only available workaround.
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by:Iain MacMillan
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got to be an issue with your 64bit system, i could not replicate the fault.
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