openssh bugs - Aug 2017 - [Bug 2770] New: open failed: administratively prohibited: open failed

https://bugzilla.mindrot.org/show_bug.cgi?id=2770

            Bug ID: 2770
           Summary: open failed: administratively prohibited: open failed
           Product: Portable OpenSSH
           Version: 7.2p2
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P5
         Component: ssh
          Assignee: unassigned-bugs at mindrot.org
          Reporter: jg at jguk.org

Could the error message be improved to clarify what the issue was?
Don't know if it relates to DNS, sockets, ports or a specific file.

Seems to occur sometimes. 
https://unix.stackexchange.com/questions/14160/ssh-tunneling-error-channel-1-open-failed-administratively-prohibited-open

My internet is stable, all my online browsing working well.
This SSH connection also working well from the shell. Both computers on
stable Ethernet connections.

j at ubuntu1404:~/aws$ ssh -i "j.pem" -C -D localhost:8080 ubuntu at
x.x.x.x
Welcome to Ubuntu 16.04.2 LTS (GNU/Linux 4.4.0-1030-aws x86_64)
ubuntu at ip-x-x-x-x:~$ channel 12: open failed: administratively
prohibited: open failed
channel 16: open failed: administratively prohibited: open failed
channel 20: open failed: administratively prohibited: open failed
channel 5: open failed: administratively prohibited: open failed
channel 6: open failed: administratively prohibited: open failed
channel 7: open failed: administratively prohibited: open failed
channel 3: open failed: administratively prohibited: open failed
channel 4: open failed: administratively prohibited: open failed
channel 6: open failed: administratively prohibited: open failed


This is in a 10 minute period.

Assuming these messages are from "ssh" client?

SSH ob client and SSHD on server is
OpenSSH_7.2p2 Ubuntu-4ubuntu2.2, OpenSSL 1.0.2g  1 Mar 2016

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https://bugzilla.mindrot.org/show_bug.cgi?id=2770

Darren Tucker <dtucker at zip.com.au> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |dtucker at zip.com.au
             Status|NEW                         |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #1 from Darren Tucker <dtucker at zip.com.au> ---
Please upgrade to a newer version, this was fixed in 7.4.

https://anongit.mindrot.org/openssh.git/commit/?id=858252fb1d451ebb0969cf9749116c8f0ee42753

Author: dtucker at openbsd.org <dtucker at openbsd.org>
Date:   Wed Feb 1 02:59:09 2017 +0000

    upstream commit

    Return true reason for port forwarding failures where
    feasible rather than always "administratively prohibited". 
bz#2674, ok djm@

    Upstream-ID: d901d9887951774e604ca970e1827afaaef9e419

*** This bug has been marked as a duplicate of bug 2674 ***

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https://bugzilla.mindrot.org/show_bug.cgi?id=2770

--- Comment #2 from Darren Tucker <dtucker at zip.com.au> ---
[...]
> Assuming these messages are from "ssh" client?
No, they're generated by the server and sent to the client which
displays them.

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--- Comment #3 from jg at jguk.org ---
Great! Thank you for fixing this already.
Apologies, I'm using latest Ubuntu LTS version, will get new version in
six months I believe.

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Damien Miller <djm at mindrot.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #4 from Damien Miller <djm at mindrot.org> ---
closing resolved bugs as of 8.6p1 release

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