[Bug 1874] New: Cannot enable agent forwarding if persistent master connection exists with no forwarding

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=1874

           Summary: Cannot enable agent forwarding if persistent master
                    connection exists with no forwarding
           Product: Portable OpenSSH
           Version: 5.8p1
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ssh
        AssignedTo: unassigned-bugs at mindrot.org
        ReportedBy: josh at joshtriplett.org


~$ ssh joshtriplett.org ssh-add -l
Could not open a connection to your authentication agent.
~$ ssh -A joshtriplett.org ssh-add -l
Could not open a connection to your authentication agent.

The second connection made use of the backgrounded master connection
opened by the first connection, which had not yet timed out.  Due to
this issue, in order to use SSH agent forwarding, I need to end all SSH
connections over that connection master, "ssh -O exit", and open a new
master connection with agent forwarding.  Or, alternatively, I have to
explicitly turn off connection sharing and turn on agent forwarding.

(Originally reported as http://bugs.debian.org/594307)

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