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How to close an existing SSH tunnel?


How do I tell Git for Windows where to find my private RSA key?How to automate SSH login with password?How can I close SSH tunnel gracefully?ssh returns “Bad owner or permissions on ~/.ssh/config”SSH tunnel doesn't workssh tunnel - bind: Cannot assign requested addressConnecting to MYSQL over SSH tunnelSSH tunnel issues since setting up public key loginHow to have ssh tunnel prompt for username & passwordRemote SSH Tunnel external access













1















In Windows, I create a scheduled task on Windows startup:



C:cygwin64binssh.exe -R 2222:127.0.0.1:3389 user@PublicHost


to expose my rdp service on a public-ip server, and I can connect rdp successfuly, but I cannot find ssh.exe in task manager, and when I shutdown windows, sometimes the 2222 port of PublicHost is not released, so later I boot windows again, the ssh.exe will give me a warning, port forwarding failed.



Is there a way to ask PublicHost to release the port (I don't have root access on PublicHost)?










share|improve this question
















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    1















    In Windows, I create a scheduled task on Windows startup:



    C:cygwin64binssh.exe -R 2222:127.0.0.1:3389 user@PublicHost


    to expose my rdp service on a public-ip server, and I can connect rdp successfuly, but I cannot find ssh.exe in task manager, and when I shutdown windows, sometimes the 2222 port of PublicHost is not released, so later I boot windows again, the ssh.exe will give me a warning, port forwarding failed.



    Is there a way to ask PublicHost to release the port (I don't have root access on PublicHost)?










    share|improve this question
















    bumped to the homepage by Community 2 mins ago


    This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.


















      1












      1








      1


      0






      In Windows, I create a scheduled task on Windows startup:



      C:cygwin64binssh.exe -R 2222:127.0.0.1:3389 user@PublicHost


      to expose my rdp service on a public-ip server, and I can connect rdp successfuly, but I cannot find ssh.exe in task manager, and when I shutdown windows, sometimes the 2222 port of PublicHost is not released, so later I boot windows again, the ssh.exe will give me a warning, port forwarding failed.



      Is there a way to ask PublicHost to release the port (I don't have root access on PublicHost)?










      share|improve this question
















      In Windows, I create a scheduled task on Windows startup:



      C:cygwin64binssh.exe -R 2222:127.0.0.1:3389 user@PublicHost


      to expose my rdp service on a public-ip server, and I can connect rdp successfuly, but I cannot find ssh.exe in task manager, and when I shutdown windows, sometimes the 2222 port of PublicHost is not released, so later I boot windows again, the ssh.exe will give me a warning, port forwarding failed.



      Is there a way to ask PublicHost to release the port (I don't have root access on PublicHost)?







      windows ssh tunnel






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited Sep 8 '16 at 16:17









      MadHatter

      70.3k11145207




      70.3k11145207










      asked Sep 8 '16 at 15:48









      Kingzone WongKingzone Wong

      62




      62





      bumped to the homepage by Community 2 mins ago


      This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.







      bumped to the homepage by Community 2 mins ago


      This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.
























          2 Answers
          2






          active

          oldest

          votes


















          0














          Can you run ssh in the foreground so that you get a shell prompt and can just logout of the ssh session?



          Because if windows is shutting down and terminating ssh.exe, it should close that port. And if it's not getting released by the server, sending your own kill signal will likely have the same effect (if you could find it in task manager).



          Or perhaps you could login (manual or scripted) into the PublicHost and kill things on that side (like /bin/bash of your UID) so the connection is dropped?






          share|improve this answer
























          • When the windows is rebooted, I want the ssh.exe to be run even before I login. that's why I need a scheduled task. If I login to PublicHost, and kill all sshd related to the current user, all other normal ssh connection will also be dropped.

            – Kingzone Wong
            Sep 8 '16 at 16:34



















          0














          If you just connect to port 2222 of PublicHost it should attempt to send traffic through the tunnel. This will time out (after a few minutes) or receive a reset response (immediately), which will result in the connection being closed and the sshd process exiting.



          You do this using any number of tools, but here's one way to do it automatically from Windows:



          C:cygwin64binssh.exe user@PublicHost "echo x | nc 127.0.0.1 2222"





          share|improve this answer
























          • I tried, it's OK, but you have to wait for a long-time timeout, and seems this timeout should be configured on PublicHost with root user?

            – Kingzone Wong
            Sep 10 '16 at 3:42











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          2 Answers
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          active

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          2 Answers
          2






          active

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          active

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          active

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          0














          Can you run ssh in the foreground so that you get a shell prompt and can just logout of the ssh session?



          Because if windows is shutting down and terminating ssh.exe, it should close that port. And if it's not getting released by the server, sending your own kill signal will likely have the same effect (if you could find it in task manager).



          Or perhaps you could login (manual or scripted) into the PublicHost and kill things on that side (like /bin/bash of your UID) so the connection is dropped?






          share|improve this answer
























          • When the windows is rebooted, I want the ssh.exe to be run even before I login. that's why I need a scheduled task. If I login to PublicHost, and kill all sshd related to the current user, all other normal ssh connection will also be dropped.

            – Kingzone Wong
            Sep 8 '16 at 16:34
















          0














          Can you run ssh in the foreground so that you get a shell prompt and can just logout of the ssh session?



          Because if windows is shutting down and terminating ssh.exe, it should close that port. And if it's not getting released by the server, sending your own kill signal will likely have the same effect (if you could find it in task manager).



          Or perhaps you could login (manual or scripted) into the PublicHost and kill things on that side (like /bin/bash of your UID) so the connection is dropped?






          share|improve this answer
























          • When the windows is rebooted, I want the ssh.exe to be run even before I login. that's why I need a scheduled task. If I login to PublicHost, and kill all sshd related to the current user, all other normal ssh connection will also be dropped.

            – Kingzone Wong
            Sep 8 '16 at 16:34














          0












          0








          0







          Can you run ssh in the foreground so that you get a shell prompt and can just logout of the ssh session?



          Because if windows is shutting down and terminating ssh.exe, it should close that port. And if it's not getting released by the server, sending your own kill signal will likely have the same effect (if you could find it in task manager).



          Or perhaps you could login (manual or scripted) into the PublicHost and kill things on that side (like /bin/bash of your UID) so the connection is dropped?






          share|improve this answer













          Can you run ssh in the foreground so that you get a shell prompt and can just logout of the ssh session?



          Because if windows is shutting down and terminating ssh.exe, it should close that port. And if it's not getting released by the server, sending your own kill signal will likely have the same effect (if you could find it in task manager).



          Or perhaps you could login (manual or scripted) into the PublicHost and kill things on that side (like /bin/bash of your UID) so the connection is dropped?







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Sep 8 '16 at 16:02









          Ryan BabchishinRyan Babchishin

          5,16011032




          5,16011032













          • When the windows is rebooted, I want the ssh.exe to be run even before I login. that's why I need a scheduled task. If I login to PublicHost, and kill all sshd related to the current user, all other normal ssh connection will also be dropped.

            – Kingzone Wong
            Sep 8 '16 at 16:34



















          • When the windows is rebooted, I want the ssh.exe to be run even before I login. that's why I need a scheduled task. If I login to PublicHost, and kill all sshd related to the current user, all other normal ssh connection will also be dropped.

            – Kingzone Wong
            Sep 8 '16 at 16:34

















          When the windows is rebooted, I want the ssh.exe to be run even before I login. that's why I need a scheduled task. If I login to PublicHost, and kill all sshd related to the current user, all other normal ssh connection will also be dropped.

          – Kingzone Wong
          Sep 8 '16 at 16:34





          When the windows is rebooted, I want the ssh.exe to be run even before I login. that's why I need a scheduled task. If I login to PublicHost, and kill all sshd related to the current user, all other normal ssh connection will also be dropped.

          – Kingzone Wong
          Sep 8 '16 at 16:34













          0














          If you just connect to port 2222 of PublicHost it should attempt to send traffic through the tunnel. This will time out (after a few minutes) or receive a reset response (immediately), which will result in the connection being closed and the sshd process exiting.



          You do this using any number of tools, but here's one way to do it automatically from Windows:



          C:cygwin64binssh.exe user@PublicHost "echo x | nc 127.0.0.1 2222"





          share|improve this answer
























          • I tried, it's OK, but you have to wait for a long-time timeout, and seems this timeout should be configured on PublicHost with root user?

            – Kingzone Wong
            Sep 10 '16 at 3:42
















          0














          If you just connect to port 2222 of PublicHost it should attempt to send traffic through the tunnel. This will time out (after a few minutes) or receive a reset response (immediately), which will result in the connection being closed and the sshd process exiting.



          You do this using any number of tools, but here's one way to do it automatically from Windows:



          C:cygwin64binssh.exe user@PublicHost "echo x | nc 127.0.0.1 2222"





          share|improve this answer
























          • I tried, it's OK, but you have to wait for a long-time timeout, and seems this timeout should be configured on PublicHost with root user?

            – Kingzone Wong
            Sep 10 '16 at 3:42














          0












          0








          0







          If you just connect to port 2222 of PublicHost it should attempt to send traffic through the tunnel. This will time out (after a few minutes) or receive a reset response (immediately), which will result in the connection being closed and the sshd process exiting.



          You do this using any number of tools, but here's one way to do it automatically from Windows:



          C:cygwin64binssh.exe user@PublicHost "echo x | nc 127.0.0.1 2222"





          share|improve this answer













          If you just connect to port 2222 of PublicHost it should attempt to send traffic through the tunnel. This will time out (after a few minutes) or receive a reset response (immediately), which will result in the connection being closed and the sshd process exiting.



          You do this using any number of tools, but here's one way to do it automatically from Windows:



          C:cygwin64binssh.exe user@PublicHost "echo x | nc 127.0.0.1 2222"






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Sep 9 '16 at 3:48









          Tom ShawTom Shaw

          3,4641022




          3,4641022













          • I tried, it's OK, but you have to wait for a long-time timeout, and seems this timeout should be configured on PublicHost with root user?

            – Kingzone Wong
            Sep 10 '16 at 3:42



















          • I tried, it's OK, but you have to wait for a long-time timeout, and seems this timeout should be configured on PublicHost with root user?

            – Kingzone Wong
            Sep 10 '16 at 3:42

















          I tried, it's OK, but you have to wait for a long-time timeout, and seems this timeout should be configured on PublicHost with root user?

          – Kingzone Wong
          Sep 10 '16 at 3:42





          I tried, it's OK, but you have to wait for a long-time timeout, and seems this timeout should be configured on PublicHost with root user?

          – Kingzone Wong
          Sep 10 '16 at 3:42


















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