On Mon, 18 Mar 2019, Michał Wadas wrote: > First, let's setup some process that binds to port that we intend to use: > > python -m SimpleHTTPServer 8000 This binds to 0.0.0.0:8000 (I presume you meant port 5000 instead) > Then try few commands: > > ssh -N -L 5000:localhost:5432 foobar # Fails and hangs > > ssh -o ExitOnForwardFailure=yes -N -L 5000:localhost:5432 foobar # Fails > and hangs > > ssh -N -L 127.0.0.1:5000:localhost:5432 foobar # Fails and hangs > > ssh -o ExitOnForwardFailure=yes -N -L 127.0.0.1:5000:localhost:5432 foobar > # Fails and exits These all bind to 127.0.0.1:5000, a distinct host:port as far as your TCP/IP stack is concerned. There is no collision here. Here's a better test: nc -l ::1 5000 & nc -l 127.0.0.1 5000 & ssh -o ExitOnForwardFailure=yes -N -L 5000:localhost:5432 foo -d _______________________________________________ openssh-unix-dev mailing list openssh-unix-dev@xxxxxxxxxxx https://lists.mindrot.org/mailman/listinfo/openssh-unix-dev
