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ssh tunnel with auto reconnect ability

Terminal - ssh tunnel with auto reconnect ability
while [ ! -f /tmp/stop ]; do ssh -o ExitOnForwardFailure=yes -R 2222:localhost:22 target "while nc -zv localhost 2222; do sleep 5; done"; sleep 5;done
2009-02-08 12:45:43
User: jianingy
Functions: sleep ssh
13
ssh tunnel with auto reconnect ability

Alternatives

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Terminal - Alternatives

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What others think

check out the -N option to ssh

Do not execute a remote command. This is useful for just forwarding ports (protocol version 2 only).

Comment by devnull 288 weeks and 4 days ago

You might want to use ~/stop or ~/.stop as the file to stop your loop, since it's usually possible for anyone on the system to reach /tmp (doesn't matter on a single-user box, but it's generally a good idea to stay in your home directory anyway).

Comment by mulad 287 weeks and 2 days ago

Or just run the who shebang out of /etc/inittab with the "respawn" option. See http://www.deer-run.com/~hal/sysadmin/SSH-SyslogNG.html

Comment by Hal_Pomeranz 260 weeks and 5 days ago

Dunno about this "target" piece in your command.

I assume your command is meant to provide a way to keep trying to connect if it fail. Inspired of this, I wrote my own command that help me automatically reconnect immediately after the connecting pipe is broken:

while true; do if ! nc -z localhost 7070 > /dev/null; then ssh -N -D 127.0.0.1:7070 -p 22 someone@somesite.com; else echo 'not connected, retry after 10 seconds...'; fi; sleep 10; done

Comment by fwonce 64 weeks ago

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