Linux tip, Fedora tip / howto: ssh tunnel suddenly stops working
ssh tunnel suddenly stops workingThe cause of this problem was hard to track down... :-(
I sometimes open a tunnel to another machine, so it can serve as a proxy for my local box:
Suddenly this started failing with the following error:
It turned out that one thing that had changed, i.e. switching the PC from a wired to a wireless connection, was causing it: the loopback device was no longer up...
To check if it is there: ifconfig should show:
To bring it up, run ifconfig lo up (as root)