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[Robie Basak <1521745@xxxxxxxxxxxxxxxxxx>]

Thank you for taking the time to report this bug and helping to make
Ubuntu better.

Please attach an example sshd_config that fails as you describe, and
then change the bug status back to New. Thanks!

** Changed in: openssh (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1521745

Title:
  sshd will fail to start or restart if non-default Port option is
  incorrectly put after a non-default ListenAddress

Status in openssh package in Ubuntu:
  Incomplete

Bug description:
  I have a system where the default listening port is changed for sshd,
  done at the bottom of my sshd_config.  I recently changed the
  ListenAddress from its default (unset, which listens on all
  interfaces) to bind to a specific IP.  The resulting relevant snippet
  of my sshd_config was:

  ListenAddress my_ip_here
  Port 12345

  I then restarted ssh with /etc/init.d/ssh restart and found that ssh
  was not listening.

  Re-reading the manpage, I see this:

  ListenAddress
               Specifies the local addresses sshd(8) should listen on.  The fol‐
               lowing forms may be used:

                     ListenAddress host|IPv4_addr|IPv6_addr
                     ListenAddress host|IPv4_addr:port
                     ListenAddress [host|IPv6_addr]:port

               If port is not specified, sshd will listen on the address and all
               prior Port options specified.  The default is to listen on all
               local addresses.  Multiple ListenAddress options are permitted.
               Additionally, any Port options must precede this option for non-
               port qualified addresses.

  On a hunch, I remove the Port line and simply change my relevant
  config to:

  ListenAddress my_ip_here:12345

  sshd then restarted just fine.

  In looking at the logs, I see:

  Dec  1 11:40:26 jhart-laptop kernel: [1207947.954263] init: ssh main process (26655) terminated with status 255
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.954277] init: ssh main process ended, respawning
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.957687] init: ssh main process (26658) terminated with status 255
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.957703] init: ssh main process ended, respawning
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.961094] init: ssh main process (26661) terminated with status 255
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.961115] init: ssh main process ended, respawning
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.964835] init: ssh main process (26664) terminated with status 255
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.964852] init: ssh main process ended, respawning
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.968028] init: ssh main process (26667) terminated with status 255
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.968043] init: ssh main process ended, respawning
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.971004] init: ssh main process (26670) terminated with status 255
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.971021] init: ssh main process ended, respawning
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.974044] init: ssh main process (26673) terminated with status 255
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.974087] init: ssh main process ended, respawning
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.977853] init: ssh main process (26676) terminated with status 255
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.977868] init: ssh main process ended, respawning
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.980928] init: ssh main process (26679) terminated with status 255
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.980944] init: ssh main process ended, respawning
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.984059] init: ssh main process (26682) terminated with status 255
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.984075] init: ssh main process ended, respawning
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.987118] init: ssh main process (26685) terminated with status 255
  Dec  1 11:40:26 jhart-laptop kernel: [1207947.987132] init: ssh respawning too fast, stopped

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: openssh-server 1:5.9p1-5ubuntu1.7
  ProcVersionSignature: Ubuntu 3.13.0-66.108~precise1-generic 3.13.11-ckt27
  Uname: Linux 3.13.0-66-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.13
  Architecture: amd64
  Date: Tue Dec  1 11:54:42 2015
  InstallationMedia: Ubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807)
  MarkForUpload: True
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/zsh
  SourcePackage: openssh
  UpgradeStatus: No upgrade log present (probably fresh install)

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