[Bug 3015] New: ssh: usability issue with -J and multiple jump hosts

[bugzilla-daemon at bugzilla.mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3015

            Bug ID: 3015
           Summary: ssh: usability issue with -J and multiple jump hosts
           Product: Portable OpenSSH
           Version: 7.9p1
          Hardware: All
               URL: https://bugs.debian.org/929669
                OS: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: ssh
          Assignee: unassigned-bugs at mindrot.org
          Reporter: pabs3 at bonedaddy.net

When I try to proxy jump through multiple hosts using the most
intuitive way to do that (multiple -J options), ssh misleads me into
believing that ssh only supports a single jump host but if I use the
right syntax by separating the hosts with commas then it works fine.

I suggest that ssh either automatically combine the values of all the
proxy jump options using commas or print an error directing the user to
manually combine the values of all the proxy jump options using commas.

   $ ssh -J master.debian.org -J paradis.debian.org draghi.debian.org
echo yay
   Only a single -J option permitted

   $ ssh -J master.debian.org,paradis.debian.org draghi.debian.org echo
yay
   yay

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