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Remote Web Workplace won't connect to PCs or server - RDGateway error 773

Posted on 2013-01-23
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Last Modified: 2013-07-22
When using Remote Web Workplace on an SBS 2011 environment, I authenticate ok, then choose the computer I want to connect to (or server), and I get a message:

"Your computer can't connect to the remote computer because an error occurred on the remote computer that you want to connect to. Contact your network administrator for assistance"

When looking at the TerminalServices-Gateway log, here's the error I get:

The user "DOMAIN\username", on client computer "ip address", met connection authorization policy and resource authorization policy requirements, but could not connect to resource "Pc or server name". The following error occurred: "773".

Permissions are correct.
This issue happens as the user or as an administrator.

The same issue happens if I try the Remote Web Workplace internally, with firewall disabled. So not an internet firewall issue nor a server firewall issue.

If I use normal RDP software straight to the servers or PCs internally, it works fine

This happens attempting to connect any PC or servers on the network (Windows XP, Windows 7, Windows 2003 or SBS 2011).

It's NOT KB969084 nor KB2592687

I have tried re-running internet wizard, resetting IIS & restarting server, nothing.

Any ideas?

Thanks.
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Question by:Black-Knight
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18 Comments
 
LVL 9

Expert Comment

by:EMJSR
ID: 38812773
When you connect manually to machines on your LAN, do you do this by IP or by machine name? It could be a DNS resolution issue perhaps?
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Expert Comment

by:BadPanda
ID: 38812783
Possibly a cert problem.  Your internet wizard may have reset them but I'm not sure.  
Is there anything in the system logs besides the 773?  What is the source?  
Panda
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Author Comment

by:Black-Knight
ID: 38812798
Hi EMJSR. It works via the name. I've checked DNS and done an nslookup, name resolution is fine

BadPanda: Definitely not a certificate issue, it would have come up with a different error. The issue was happening before running the internet wizard anyways, but I've set the old certificate back.

Unfortunately no other logs, the only error I could find was that 773, nothing else.

Any ideas?
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Expert Comment

by:EMJSR
ID: 38812814
How about certain ActiveX controls that are usually required by the Remote Web Workplace? If you add the Workplace address to the Trusted Sites and make sure that ActiveX scripts are allowed to run ("Enable" where possible, "Prompt" where "Enable" is deemed unsafe). It's something simple, but I've had numerous issues with IE's security settings in the past.
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Author Comment

by:Black-Knight
ID: 38812830
Already tried that too unfortunately.

It actually does come up with the username and password screen (which usually doesn't if you have an activex issue). The error is presented right after you put the correct password in and it attempts to connect.
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Expert Comment

by:EMJSR
ID: 38812849
I know you said that the permissions are correct, but just to double check; all users have Local Administrator rights (on their respective computers)? Shouldn't really matter for the Domain Admin, but I thought I ask.

Also, in Windows 7 in particular, there is an option within the local Remote connection rights (Computer > Properties > Advanced > Remote tab) to allow "Connections from computers running any version of Remote Desktop". I know you said it's not RDP version related, but from my experience that option is a carte blance for RDP connections not matter what.

Sorry, just trying to rule out a few more common things, not doubting your abilities.
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Author Comment

by:Black-Knight
ID: 38812864
That's ok EMJSR :)
Checked all of that, they are all correct. This issue with RWW also happens when attempting to remote to a 2003 server, which should have no problems with encryption etc. Unfortunately, still not able to.

Any ideas?
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Expert Comment

by:EMJSR
ID: 38812893
Are you running Exchange on your network?

This might point you in another direction. The KB article is based on the SBS2003 environment, but it might offer a suggestion towards the right track:

http://support.microsoft.com/kb/886209
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Author Comment

by:Black-Knight
ID: 38813010
No luck!

Any suggestions?
0
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Expert Comment

by:EMJSR
ID: 38815633
This is really a tricky one. Maybe have a look in IIS and see whether you can resolve this by  changing the "SBS Web Workplace AppPool" from .NET version 2.0 to 4.0.

I'm not sure how much that could help, based on when this error seems to show, but I even asked some of my colleagues at work and that's definitely a new one to all of us!

Additionally maybe have a look at this option:

Run the FixMyNetwork wizard (Windows SBS Console > Network > Connectivity).

You might have to run it a few times.
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Author Comment

by:Black-Knight
ID: 38878524
Checked all of those but still having the problem. Just noticed this is happening to another client of mine. No updates have been installed since the issue started happening.

Any ideas?
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Expert Comment

by:CAT_Computers
ID: 39058235
I am experiencing the same problem.  Tried new certificates, checked IIS bindings, finally even completely reinstalled the RD Gateway - problem still exists.  Windows Vista and Windows 7 clients can connect fine from the outside via RWW ActiveX RDP connection, however Windows 7 fails everytime (even on the server) with the same error.
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Author Comment

by:Black-Knight
ID: 39259257
With mine all fails, Vista and 7 too. Still no solution to this guys...
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Expert Comment

by:BadPanda
ID: 39259955
B-K, this sounds like a long shot but I just read an article where the viewing computer and not the intended viewed computer was the problem.
Simply, it was the browser.   IE10 was not supported.  Which browser are you using on the computer that you are using to view the remote computer?  If you are always using the same computer to view remote computers with, you might want to try a different one.  Just a thought.
Here is a Microsoft article with a step-by-step on TS for this general problem: http://support.microsoft.com/kb/2477176
Maybe one of those will help.
Panda
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Author Comment

by:Black-Knight
ID: 39260849
Tried from WIN8, WIN7, WINXP, IE8, IE9 & IE10 :)

All fails, and the same error message gets generated in the log, unfortunately.

Thoughts?
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Expert Comment

by:BadPanda
ID: 39260876
This article from technet doesn't specifically deal with error 773, but it has some useful steps:
http://technet.microsoft.com/en-us/library/cc727375%28v=WS.10%29.aspx
Mostly the remote desktop allowing for any version option caught my eye.  I've run into that before but not with this error.  
Panda
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Accepted Solution

by:
Black-Knight earned 0 total points
ID: 39333085
Hey guys.

It has been a while.

Thought I should post what I did to fix at the end.

Fixed issue by:

-Checked registry to find some missing entries related to RPC - Checked HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders found msapsspc.dll, schannel.dll, digest.dll, msnsspc.dll added credssp.dll, pwdssp.dll

Restarted the server

5min fix, to a 6 month issue.

Hope this will help someone in the future :)

Thanks to everybody who helped, I appreciate it.

Rod
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Author Closing Comment

by:Black-Knight
ID: 39345422
end up figuring out the issue myself.
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