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How to Block RDP only on External network?

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  • How to Block RDP only on External network?

    Hi,

    My Server is running Windows Server 2008 R2 and has two network interface cards. One interface is connected to public network and other is connected to my local intranet.

    My question is how can I have RDP work only on private interface and not on public? I tried going through settings in Firewall and RDS Host Configuration but none helped.

    Appreciate you response.

    Thanks and Regards,

  • #2
    Re: How to Block RDP only on External network?

    have you tried connecting from outside?
    Please do show your appreciation to those who assist you by leaving Rep Point https://www.petri.com/forums/core/im.../icon_beer.gif

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    • #3
      Re: How to Block RDP only on External network?

      Host configuration should let you use one adapter only -- at least thats what R2 shows
      Tom Jones
      MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
      PhD, MSc, FIAP, MIITT
      IT Trainer / Consultant
      Ossian Ltd
      Scotland

      ** Remember to give credit where credit is due and leave reputation points where appropriate **

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      • #4
        Re: How to Block RDP only on External network?

        Thanks for your responses.

        tehcamel: have you tried connecting from outside?
        Yes I did and I was able to access it. This is the reason why I would like to block only the external access.

        Ossian: Host configuration should let you use one adapter only -- at least thats what R2 shows
        I went through all RDP-Tcp options but couldn't find anything relevant.


        It's been a while and I cannot recall if this was by default enabled or if I did something to enable it. Is there any other option that I could use to control?

        Thanks and Regards,

        Comment


        • #5
          Re: How to Block RDP only on External network?

          Go to host config
          Right click RDP-TCP connection, select properties
          Click Network Adapter tab
          Change from All adapters to specific adapter
          Tom Jones
          MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
          PhD, MSc, FIAP, MIITT
          IT Trainer / Consultant
          Ossian Ltd
          Scotland

          ** Remember to give credit where credit is due and leave reputation points where appropriate **

          Comment


          • #6
            Re: How to Block RDP only on External network?

            Originally posted by Ossian View Post
            Go to host config
            Right click RDP-TCP connection, select properties
            Click Network Adapter tab
            Change from All adapters to specific adapter
            Thanks this helped. It's really strange as I tried this same option earlier and it didn't work and now same thing did

            Comment


            • #7
              Re: How to Block RDP only on External network?

              So you selected your internal adapter and now nothing works frmo outside?
              Tom Jones
              MCT, MCSE (2000:Security & 2003), MCSA:Security & Messaging, MCDBA, MCDST, MCITP(EA, EMA, SA, EDA, ES, CS), MCTS, MCP, Sec+
              PhD, MSc, FIAP, MIITT
              IT Trainer / Consultant
              Ossian Ltd
              Scotland

              ** Remember to give credit where credit is due and leave reputation points where appropriate **

              Comment


              • #8
                Re: How to Block RDP only on External network?

                Yes, I selected internal adapter and RDP from outside is blocked where as within intranet I can still do RDP.

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                • #9
                  Re: How to Block RDP only on External network?

                  you can't simply block the traffic to that specific hosts on your firewall?
                  Marcel
                  Technical Consultant
                  Netherlands
                  http://www.phetios.com
                  http://blog.nessus.nl

                  MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
                  "No matter how secure, there is always the human factor."

                  "Enjoy life today, tomorrow may never come."
                  "If you're going through hell, keep going. ~Winston Churchill"

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                  • #10
                    Re: How to Block RDP only on External network?

                    he may be using the server as the firewall marcel.... i thought of that initially too
                    Please do show your appreciation to those who assist you by leaving Rep Point https://www.petri.com/forums/core/im.../icon_beer.gif

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                    • #11
                      Re: How to Block RDP only on External network?

                      still though, RDP from remote to a firewall???
                      Marcel
                      Technical Consultant
                      Netherlands
                      http://www.phetios.com
                      http://blog.nessus.nl

                      MCITP(EA, SA), MCSA/E 2003:Security, CCNA, SNAF, DCUCI, CCSA/E/E+ (R60), VCP4/5, NCDA, NCIE - SAN, NCIE - BR, EMCPE
                      "No matter how secure, there is always the human factor."

                      "Enjoy life today, tomorrow may never come."
                      "If you're going through hell, keep going. ~Winston Churchill"

                      Comment


                      • #12
                        Re: How to Block RDP only on External network?

                        You can configure the server's firewall to block that traffic by adjusting the scope on the RDP firewall rule. See screenshot:
                        Click image for larger version

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                        Regards,
                        Jeremy

                        Network Consultant/Engineer
                        Baltimore - Washington area and beyond
                        www.gma-cpa.com

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                        • #13
                          Re: How to Block RDP only on External network?

                          Thanks Jeremy. Firewall configuration worked too

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