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  • Can't RDP through VPN

    I am trying to connect 2 PC's to a terminal server through client-based VPN's. Clients are XP SP2, TS is Windows 2k3 SP2. We have multiple users connecting to that box via RDP from a different location, and it works fine.

    For the ones giving me troubles, the VPN connects up ok, i can see network shares and ping everything, but when i try to connect to the server with RDP, it starts to open the window, then gives "your remote desktop connection has ended. the connection to the remote computer was lost" before it even brings up the username/pwd box.

    Nothing in the event log on the PC's, server shows EventID 50 "The RDP protocol component X.224 detected an error in the protocol stream". I've tried every registry fix from MS that i could find, deleting the certificates keys and nothing has worked.

    Any help would be great.

    Thanks

  • #2
    Re: Can't RDP through VPN

    Any PCs or other servers on the network with the TS you could try connecting to?

    Are the machines experiencing problems both at the same site, using the same internet connection? Does another machine using the same connection(s) have the same problem?
    Gareth Howells

    BSc (Hons), MBCS, MCP, MCDST, ICCE

    Any advice is given in good faith and without warranty.

    Please give reputation points if somebody has helped you.

    "For by now I could have stretched out my hand and struck you and your people with a plague that would have wiped you off the Earth." (Exodus 9:15) - I could kill you with my thumb.

    "Everything that lives and moves will be food for you." (Genesis 9:3) - For every animal you don't eat, I'm going to eat three.

    Comment


    • #3
      Re: Can't RDP through VPN

      I've tried to RDP to a couple of other servers as well, same results. And yes, both PC's that have issues are at the same site, using same internet connection.

      I don't have control of the firewall at that location, but I had them open up 3389 outbound, even though i'm not entirely sure it's necessary since it's going through the VPN.

      When I'm at home with my laptop, I can connect my VPN, and RDP to any server with no problems, so i don't think it's an issue with the VPN, or the Firewall at the main office.

      Comment


      • #4
        Re: Can't RDP through VPN

        Ok, but what about a different machine using the same internet connection as the two computers having problems.
        Gareth Howells

        BSc (Hons), MBCS, MCP, MCDST, ICCE

        Any advice is given in good faith and without warranty.

        Please give reputation points if somebody has helped you.

        "For by now I could have stretched out my hand and struck you and your people with a plague that would have wiped you off the Earth." (Exodus 9:15) - I could kill you with my thumb.

        "Everything that lives and moves will be food for you." (Genesis 9:3) - For every animal you don't eat, I'm going to eat three.

        Comment


        • #5
          Re: Can't RDP through VPN

          Haven't tried that yet. I'll give it a shot.

          Comment


          • #6
            Re: Can't RDP through VPN

            Please try to use RDP Client 6.1.
            Also, the firewall rule should allow any port to TCP 3389 not TCP 3389 to TCP 3389...
            This a known mistake.
            Best Regards,

            Yuval Sinay

            LinkedIn: https://www.linkedin.com/in/yuval14, Blog: http://blogs.microsoft.co.il/blogs/yuval14

            Comment


            • #7
              Re: Can't RDP through VPN

              It is version 6.1.

              And i'm still working on getting access to another PC at that site to test with.

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              • #8
                Re: Can't RDP through VPN

                Ok, I tried from another PC at that site, and same issue. Ping is fine, network shares are fine, just no RDP.

                I'm completely at a loss.

                Comment


                • #9
                  Re: Can't RDP through VPN

                  Please check the firewall issue and update us.

                  Also, please review:

                  http://support.microsoft.com/kb/948496
                  Best Regards,

                  Yuval Sinay

                  LinkedIn: https://www.linkedin.com/in/yuval14, Blog: http://blogs.microsoft.co.il/blogs/yuval14

                  Comment


                  • #10
                    Re: Can't RDP through VPN

                    The Firewall's should be setup correctly, because if I do it from any other site, it works ok. And the firewall at that site has 3389 outbound open.

                    Comment


                    • #11
                      Re: Can't RDP through VPN

                      What if you RDP from that site without going through the VPN first? That way you'll be able to narrow down the problem to either the VPN or the RDP.

                      Comment


                      • #12
                        Re: Can't RDP through VPN

                        Here's another tidbit...this is from the logs on the head end ISA Firewall.

                        A connection was abortively closed after one of the peers sent a RST segment

                        And the Terminal Server has the following in the event logs:

                        The RDP protocol component X.224 detected an error in the protocol stream and has disconnected the client.

                        EventID: 50
                        Source: TermDD

                        Searching for this has told me to delete certificates from the registry, and try a couple other registry tweaks, all to no avail.

                        Comment


                        • #13
                          Re: Can't RDP through VPN

                          Ok, we temporarily opened up RDP inbound on the ISA, and without the VPN, i can get into the server no problem. So something with the VPN is causing the issue.

                          Could the ASA that this PC is behind be doing something goofy with the traffic?

                          Comment


                          • #14
                            Re: Can't RDP through VPN

                            If the server is 2003 and above, please review Cisco guide:

                            http://www.cisco.com/en/US/products/...807d287e.shtml

                            Also, please use the latest VPN client from Cisco and try to change the MTU on the client side.
                            Best Regards,

                            Yuval Sinay

                            LinkedIn: https://www.linkedin.com/in/yuval14, Blog: http://blogs.microsoft.co.il/blogs/yuval14

                            Comment


                            • #15
                              Re: Can't RDP through VPN

                              Yes, the server is Windows 2003 SP2. but the firewall that i'm connecting the VPN to is a Microsoft ISA server, not a Cisco. The firewall at the remote location is a Cisco ASA.

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