[X2go-bugs] [Tickets #68] Re: Only one session is working with ssh-proxy

bugs at x2go.org bugs at x2go.org
Mon May 23 23:09:27 CEST 2011


Ticket URL: http://code.x2go.org/horde4/whups/ticket/?id=68
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  Ticket             | 68
  Updated By         | Mike Gabriel <mike.gabriel at das-netzwerkteam.de>
  Summary            | Only one session is working with ssh-proxy
  Queue              | pyhoca-gui
  Version            | HEAD
  Type               | Bug
-State              | Unconfirmed
+State              | Feedback
  Priority           | 2. Medium
  Operating System   | 5
-Owners             |
+Owners             | Mike Gabriel
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Mike Gabriel <mike.gabriel at das-netzwerkteam.de> (2011-05-23 23:09) wrote:

> If one has connected to a host using ssh-proxy, it is not possible  
> to connect to another host from pyhoca-gui. This is very  
> inconvenient, as we have many servers where connections should be  
> possible.

is it possible that you try to bind the SSH proxy tunnels to the same  
port on localhost? By design of TCP/IP this is not possible. If you  
use several session profiles in PyHoca-GUI that are configured to use  
the SSH proxy feature then who have to make sure that they do not try  
to bind the local tunnel endpoint to the same IP port on localhost.

However, if your PyHoca-GUI wants to use the same IP port for several  
profiles you will encounter two problems:

(1) in theory: simultaneous sessions will not be possible
(2) you will receive an SSH host key error before connect

We have to implement a mechanism in PyHoca-GUI that checks this and  
warns about duplicate port usage on local SSH proxy tunnel endpoints.

If unsure, please attach those parts of your sessions file that  
describe the sshproxy parameters.







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