Creating persistent netcat link

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I have a remote raspberrypi that uses autossh to connect to my local machine (with reverse tunnel -R). This should feed a dump1090 instance on my local machine. I'm using



/bin/nc localhost 40005 | /bin/nc localhost 30104


and it works great until the connection is good but when the link breaks the new connection isn't established. How can I make the netcat link persistent? Thanks!










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    up vote
    0
    down vote

    favorite












    I have a remote raspberrypi that uses autossh to connect to my local machine (with reverse tunnel -R). This should feed a dump1090 instance on my local machine. I'm using



    /bin/nc localhost 40005 | /bin/nc localhost 30104


    and it works great until the connection is good but when the link breaks the new connection isn't established. How can I make the netcat link persistent? Thanks!










    share|improve this question

























      up vote
      0
      down vote

      favorite









      up vote
      0
      down vote

      favorite











      I have a remote raspberrypi that uses autossh to connect to my local machine (with reverse tunnel -R). This should feed a dump1090 instance on my local machine. I'm using



      /bin/nc localhost 40005 | /bin/nc localhost 30104


      and it works great until the connection is good but when the link breaks the new connection isn't established. How can I make the netcat link persistent? Thanks!










      share|improve this question















      I have a remote raspberrypi that uses autossh to connect to my local machine (with reverse tunnel -R). This should feed a dump1090 instance on my local machine. I'm using



      /bin/nc localhost 40005 | /bin/nc localhost 30104


      and it works great until the connection is good but when the link breaks the new connection isn't established. How can I make the netcat link persistent? Thanks!







      raspberry-pi ssh-tunneling netcat autossh






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      share|improve this question













      share|improve this question




      share|improve this question








      edited Dec 9 at 13:48









      Tomasz

      9,17852964




      9,17852964










      asked Dec 9 at 9:20









      Pavel T

      111




      111




















          2 Answers
          2






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          up vote
          2
          down vote













          Kind of a hacky option, but you could just wrap your nc command(s) in a while loop:



          #!/bin/bash
          while true; do
          # your netcat command(s) here
          done;


          This'll keep re-launching the netcat stuff until you kill the script.






          share|improve this answer
















          • 1




            You might want a sleep 1 in the loop too, to stop the loop running away on failure.
            – roaima
            Dec 9 at 9:52










          • The main problem with this is that the netcat instance isn't killed when the link breaks, it just hangs.
            – Pavel T
            Dec 9 at 12:26

















          up vote
          1
          down vote













          It was solved with socat utility. Thanks to all!



          /usr/bin/socat -u TCP:localhost:40005 TCP:localhost:30104






          share|improve this answer




















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            2 Answers
            2






            active

            oldest

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            2 Answers
            2






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes








            up vote
            2
            down vote













            Kind of a hacky option, but you could just wrap your nc command(s) in a while loop:



            #!/bin/bash
            while true; do
            # your netcat command(s) here
            done;


            This'll keep re-launching the netcat stuff until you kill the script.






            share|improve this answer
















            • 1




              You might want a sleep 1 in the loop too, to stop the loop running away on failure.
              – roaima
              Dec 9 at 9:52










            • The main problem with this is that the netcat instance isn't killed when the link breaks, it just hangs.
              – Pavel T
              Dec 9 at 12:26














            up vote
            2
            down vote













            Kind of a hacky option, but you could just wrap your nc command(s) in a while loop:



            #!/bin/bash
            while true; do
            # your netcat command(s) here
            done;


            This'll keep re-launching the netcat stuff until you kill the script.






            share|improve this answer
















            • 1




              You might want a sleep 1 in the loop too, to stop the loop running away on failure.
              – roaima
              Dec 9 at 9:52










            • The main problem with this is that the netcat instance isn't killed when the link breaks, it just hangs.
              – Pavel T
              Dec 9 at 12:26












            up vote
            2
            down vote










            up vote
            2
            down vote









            Kind of a hacky option, but you could just wrap your nc command(s) in a while loop:



            #!/bin/bash
            while true; do
            # your netcat command(s) here
            done;


            This'll keep re-launching the netcat stuff until you kill the script.






            share|improve this answer












            Kind of a hacky option, but you could just wrap your nc command(s) in a while loop:



            #!/bin/bash
            while true; do
            # your netcat command(s) here
            done;


            This'll keep re-launching the netcat stuff until you kill the script.







            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered Dec 9 at 9:24









            solarshado

            26714




            26714







            • 1




              You might want a sleep 1 in the loop too, to stop the loop running away on failure.
              – roaima
              Dec 9 at 9:52










            • The main problem with this is that the netcat instance isn't killed when the link breaks, it just hangs.
              – Pavel T
              Dec 9 at 12:26












            • 1




              You might want a sleep 1 in the loop too, to stop the loop running away on failure.
              – roaima
              Dec 9 at 9:52










            • The main problem with this is that the netcat instance isn't killed when the link breaks, it just hangs.
              – Pavel T
              Dec 9 at 12:26







            1




            1




            You might want a sleep 1 in the loop too, to stop the loop running away on failure.
            – roaima
            Dec 9 at 9:52




            You might want a sleep 1 in the loop too, to stop the loop running away on failure.
            – roaima
            Dec 9 at 9:52












            The main problem with this is that the netcat instance isn't killed when the link breaks, it just hangs.
            – Pavel T
            Dec 9 at 12:26




            The main problem with this is that the netcat instance isn't killed when the link breaks, it just hangs.
            – Pavel T
            Dec 9 at 12:26












            up vote
            1
            down vote













            It was solved with socat utility. Thanks to all!



            /usr/bin/socat -u TCP:localhost:40005 TCP:localhost:30104






            share|improve this answer
























              up vote
              1
              down vote













              It was solved with socat utility. Thanks to all!



              /usr/bin/socat -u TCP:localhost:40005 TCP:localhost:30104






              share|improve this answer






















                up vote
                1
                down vote










                up vote
                1
                down vote









                It was solved with socat utility. Thanks to all!



                /usr/bin/socat -u TCP:localhost:40005 TCP:localhost:30104






                share|improve this answer












                It was solved with socat utility. Thanks to all!



                /usr/bin/socat -u TCP:localhost:40005 TCP:localhost:30104







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Dec 10 at 14:55









                Pavel T

                111




                111



























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