Warning: remote port forwarding failed for listen port 4043 - SSH

I have a script that does a port forwarding for me:

ssh -n -R localhost:4043:localhost:22 remoteserver.example.com

The problem with this is that if port forwarding fails, ssh prints

Warning: remote port forwarding failed for listen port 4043

But it STAYS CONNECTED instead of properly failing with exit code.

So it is a MAJOR pain to detect this condition and kill ssh.

How can I change is so that, when report port forwarding cannot be
accomplished, ssh exits right away?

I think that it is a bug, period.

thanks

i

>>>>> "Ignoramus3694" == Ignoramus3694 writes:

Ignoramus3694> I have a script that does a port forwarding for me: ssh
Ignoramus3694> -n -R localhost:4043:localhost:22
Ignoramus3694> remoteserver.example.com

Ignoramus3694> The problem with this is that if port forwarding fails,
Ignoramus3694> ssh prints

Ignoramus3694> Warning: remote port forwarding failed for listen port
Ignoramus3694> 4043

Ignoramus3694> But it STAYS CONNECTED instead of properly failing with
Ignoramus3694> exit code.

Ignoramus3694> So it is a MAJOR pain to detect this condition and kill
Ignoramus3694> ssh.

Ignoramus3694> How can I change is so that, when report port
Ignoramus3694> forwarding cannot be accomplished, ssh exits right
Ignoramus3694> away?

Reading the documentation [ssh_config(5)]:

ExitOnForwardFailure
Specifies whether ssh(1) should terminate the connection if it
cannot set up all requested dynamic, tunnel, local, and remote
port forwardings. The argument must be ``yes'' or ``no''. The
default is ``no''.

Ignoramus3694> I think that it is a bug, period.

It is not a bug, since that is how it is documented to work.

Ignoramus3694> thanks

Ignoramus3694> i

--
Richard Silverman
res@qoxp.net