[Bug 1609] New: ControlMaster auto improvement

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=1609

           Summary: ControlMaster auto improvement
           Product: Portable OpenSSH
           Version: 5.1p1
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ssh
        AssignedTo: unassigned-bugs at mindrot.org
        ReportedBy: avalon at friendofpooh.com


Hallo,

currently if one uses ControlMaster auto, then things work fine but one
is not able to use port forwarding and other features on subsequent
connections.

For example if one first opens a ssh connection to a host, then tries a
command like "vncviewer -via host :1", then that fails badly. Adding
command line options in this case is cumbersome.

So my suggestion is when "ControlMaster auto" is selected then in case
of subsequent connection to the same host multiplexing to get disabled
if client is requesting features that will not be available when using
multiplexing.

So if
1. ssh host
2. ssh host # in another terminal
multiplexing should be enabled

But if
1. ssh host
2. ssh -L ##:xxx:## host #in another terminal
multiplexing should not be used for the second invocation

Hope this makes sense.

Regards

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