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How can i reestablish a Tunnel if my localhost goes down?

i have 2 machines, Remotehost and localhost, on my localhost im running autossh to keep the tunnel alive in case of network problems.

autossh -M 20000 -L 3300:192.168.2.101:3306 -R 3000:192.168.1.3:3000 [email protected] -p 80

but what if i need to reboot the localhost? how do i auto reconnect the tunnel then?

2 Answers 2

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Put the command to establish the tunnel in some script which is executed on boot. You could use /etc/rc.local, you could write your own init script in /etc/init or /etc/init.d, or more elegantly, you could write a script in /etc/network/if-up.d. The last option executes the script after the network interface comes up.

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  • Calling it on /etc/network/if-up.d will not make it be called again and again every time interface get down and up again?
    – TNT
    Jan 31, 2018 at 19:57
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Another simple option is to add @reboot autossh ... & to /etc/cron.d/autossh

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  • 2
    This will look as: @reboot autossh -f -nNT -R 3269:host-providing:3269 firewalled-host &
    – nicoX
    Oct 7, 2013 at 9:03
  • 2
    no need to add "&" at the end, -f already place the command in background Apr 7, 2016 at 13:04

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