Julian Edwards wrote:
> As far as I can tell, there's nothing actually going wrong here.  I am
> interested in the two examples' different error messages though, why is
> one:

It's the difference in the forwarding direction (the -R vs. -L switch
when using openssh-client).

> Warning: remote port forwarding failed for listen port 8666

This is when you do:

    ssh -R8666:localhost:1234 [email protected] -s sftp

(i.e. ask the server to listen on a port and forward connections to that
port to your local machine.)

> and the other:
> 
> channel 1: open failed: unknown channel type: unknown channel

This is when you do:

    ssh -L8666:localhost:22 [email protected] -s sftp
    
then try to connect to port 8666 on your local machine.

(i.e. ask the server to forward your local connection.)

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https://bugs.launchpad.net/bugs/689213

Title:
  Poppy returns a weird error message if someone tries to forward a port

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