[Touch-packages] [Bug 1521745] Re: sshd will fail to start or restart if non-default Port option is incorrectly put after a non-default ListenAddress
Thanks Robie. I think you may have misunderstood what the bug is. The quote you reference is not really relevant in this case, because what I am reporting isn't that something goes wrong when a port is not specified. The important line from the documentation is this, which I provided originally: "Additionally, any Port options must precede this option for non-port qualified addresses." So, yes, my configuration is invalid, but the behavior of sshd when this happens and the experience around it could use improvement. If it detects that the configuration is invalid, it should flag it as such and make it obvious from the logs/stdout/stdterr rather than letting the process try to restart and falsely report that it restarted successfully, because it didn't. I agree that part of this could legitimately be a bug in OpenSSH. ** Changed in: openssh (Ubuntu) Status: Invalid => Opinion ** Changed in: openssh (Ubuntu) Status: Opinion => New -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. 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: New 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,
[Touch-packages] [Bug 1521745] Re: sshd will fail to start or restart if non-default Port option is incorrectly put after a non-default ListenAddress
** Attachment added: "default pre-bug sshd_config" https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1521745/+attachment/4533350/+files/sshd_config -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1521745/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to :
[Touch-packages] [Bug 1521745] Re: sshd will fail to start or restart if non-default Port option is incorrectly put after a non-default ListenAddress
** Attachment added: "modified sshd_config exhibiting bug" https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1521745/+attachment/4533351/+files/sshd_config -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1521745/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to :
[Touch-packages] [Bug 1521745] Re: sshd will fail to start or restart if non-default Port option is incorrectly put after a non-default ListenAddress
Here is the default configuration file I had been using prior to modifications. AFAIK it is nearly identical to the default that comes with whatever version of OpenSSH that ships with 12.04. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. 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) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1521745/+subscriptions -- Mailing list:
[Touch-packages] [Bug 1521745] Re: sshd will fail to start or restart if non-default Port option is incorrectly put after a non-default ListenAddress
I've attached my mostly default configuration that does not exhibit the problem as well as the configuration that does exhibit the problem. Obviously, to reproduce this you'll need to use a ListenAddress and perhaps a Port argument that suits your setup. To reproduce this, take my original configuration, or simply ensure that your sshd_config has no ListenAddress or Port arguments (anywhere, in any order), and restart sshd, confirming it is listening on 22/TCP as normal: $ sudo /etc/init.d/ssh restart Rather than invoking init scripts through /etc/init.d, use the service(8) utility, e.g. service ssh restart Since the script you are attempting to invoke has been converted to an Upstart job, you may also use the stop(8) and then start(8) utilities, e.g. stop ssh ; start ssh. The restart(8) utility is also available. ssh stop/waiting ssh start/running, process 5968 $ sudo lsof -np 5968 |grep LISTEN lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/jhart/.gvfs Output information may be incomplete. sshd5968 root3u IPv4 8942314 0t0 TCP *:ssh (LISTEN) sshd5968 root4u IPv6 8942316 0t0 TCP *:ssh (LISTEN) Then, take my modified configuration, or ensure that your ListenAddress specification is before the Port argument and the ListenAddress is set to something other than 0.0.0.0 (I think), and then restart sshd. You'll see that it didn't start, and is not running or listening: $ sudo /etc/init.d/ssh restart Rather than invoking init scripts through /etc/init.d, use the service(8) utility, e.g. service ssh restart Since the script you are attempting to invoke has been converted to an Upstart job, you may also use the stop(8) and then start(8) utilities, e.g. stop ssh ; start ssh. The restart(8) utility is also available. ssh stop/waiting ssh start/running, process 6008 $ sudo lsof -np 6008 |grep LISTEN lsof: WARNING: can't stat() fuse.gvfs-fuse-daemon file system /home/jhart/.gvfs Output information may be incomplete. [ jhart@jhart-laptop (12/11/15 11:21:17) ~ ] $ ps aux |grep sshd jhart 6048 0.0 0.0 9388 924 pts/4S+ 11:21 0:00 grep sshd If you then swap the order of the ListenAddress and Port arguments, or use the combined ListenAddress:Port option, this works fine. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. 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
[Touch-packages] [Bug 1521745] [NEW] sshd will fail to start or restart if non-default Port option is incorrectly put after a non-default ListenAddress
Public bug reported: 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) ** Affects: openssh (Ubuntu) Importance: Undecided Status: New ** Tags: amd64 apport-bug precise running-unity -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssh in Ubuntu. 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: New 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
