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How to update Windows 7 Pro SP1 to support Network Layer Authentication (DTLS) when connecting to another computer with Remote Desktop Connection.

Posted on 2014-03-22
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Last Modified: 2014-04-05
Hello all,
Would most appreciate any input.  

I have a windows 7 pro, sp1, x64 machine.  
Trying to connect to any system requiring NLA.
Cannot get this system to update rdp past 6.3.9600 which does not support NLA.  
Have done all windows updates.  
Have installed KB2574819-v2-x64 and KB2592687.  (RDP 8.0 updates)
Have edited local group policy in accordance with above articles.
Have verified that all windows updates were successful.  
Rebooted many times.  
System began with 6.1 so it has updated somewhat.  

ON a deadline... of course, aren't we always...
Thanks to all on this forum.  When I retire I am going to help out here, love this site.
JLG
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Question by:4rg
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Assisted Solution

by:Santosh Gupta
Santosh Gupta earned 250 total points
ID: 39947633
Hi,

Did you installed KB2574819 Before you install the RDP 8.0 update, as a prerequisite.

if not then install 2574819 then 2592687 and reboot the machine.

http://support.microsoft.com/kb/2574819

http://support.microsoft.com/kb/2592687
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Assisted Solution

by:McKnife
McKnife earned 250 total points
ID: 39948520
Please be clear on NLA. All Windows 7 rdp clients support NLA. What errors do you get that make you think it doesn't?
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Accepted Solution

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4rg earned 0 total points
ID: 39949150
What made me think it wasn't is that under help and about, it said NLA was not supported.
And the error message when I tried to use it.

I figured it out.  

I was missing credssp.dll entry in the following key.
once I added it to the list of dll's already there, everything worked.
I did not even have to restart the machine.

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders

Happy computing to all
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Expert Comment

by:McKnife
ID: 39949752
Good to hear you found a solution.
But I nevertheless wonder what you are talking about: where did it say "NL is not supported"? If I open the RDP client on win7 and go to about, of course it says NLA is supported, and I did not have to change anything.
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Author Comment

by:4rg
ID: 39966379
Actually, where yours (and now mine) says NLA is supported, mine said NLA is not supported.  Really, try it... go remove the credssp.dll entry from the registry and it will change that line.  Then put it back and it comes back.

I now believe that this is related to a virus this system had back about a year ago.  One where it hid all the files from the desktop and start menu and chilled out all the .exe files.
You know the one?
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LVL 53

Expert Comment

by:McKnife
ID: 39966413
I believe, that removing credssp will change it, yes. Ok, so it was a virus? Wonder why a virus should want to do this...
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Author Closing Comment

by:4rg
ID: 39979852
Just splitting the points between you both for answering.  Thanks for taking your time.
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