openssh bugs - Mar 2020 - [Bug 3133] New: Dynamically Assigned Ports for DynamicForward and LocalForward

https://bugzilla.mindrot.org/show_bug.cgi?id=3133

            Bug ID: 3133
           Summary: Dynamically Assigned Ports for DynamicForward and
                    LocalForward
           Product: Portable OpenSSH
           Version: 8.2p1
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: ssh
          Assignee: unassigned-bugs at mindrot.org
          Reporter: cmirchandani at msn.com

The RemoteForward option allows a port to be dynamically assigned if 0
is entered as the port number. It would be helpful if the ssh client
could do the same for DynamicForwards and LocalForwards.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.

https://bugzilla.mindrot.org/show_bug.cgi?id=3133

Norman Rasmussen <norman at rasmussen.co.za> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |norman at rasmussen.co.za

--- Comment #1 from Norman Rasmussen <norman at rasmussen.co.za> ---
+1. RemoteForward has had the ability to dynamically allocate the
listening port since bz#1003, but LocalForward doesn't currently
support it.

I'd like to be able to do something like:
$ ssh -MNf remote
$ port=$(ssh -O forward -L 0:localhost:1234 remote)
$ client localhost:$port

without having to do a "localport=$(( 32000 + $RANDOM )); ssh -L
$localport:localhost:1234 && break" loop, or something similar.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.

https://bugzilla.mindrot.org/show_bug.cgi?id=3133

LaurenceF <laurence at the4thplatform.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |laurence at the4thplatform.co.
                   |                            |uk

--- Comment #2 from LaurenceF <laurence at the4thplatform.co.uk> ---
I have been thinking about requesting something similar however I've
realised because the local tunnel port is only valid while the SSH
command is running to have a dynamically assigned local port from the
Free pool you will need to write it to stdout in a parseable line and
also to a local file and / or on windows a user registry key. This
would then allow another application to pick up the Local TCP port
number and use it.

My suggestion was going to be if the local port number specified in the
is actually an Alphanumeric string rather than a purely numeric string
then this alphanumeric means assign a dynamic port port and use the
string as used in the file name / registry key name that will contain
the number of the Local TCP port number.

-- 
You are receiving this mail because:
You are watching the assignee of the bug.