Here is from a broken server running your version:
# /usr/lib/systemd/system/ssh.service
[Unit]
Description=OpenBSD Secure Shell server
Documentation=man:sshd(8) man:sshd_config(5)
After=network.target auditd.service
ConditionPathExists=!/etc/ssh/sshd_not_to_be_run
[Service]
EnvironmentFile=-/etc/default/ssh
ExecStartPre=/usr/sbin/sshd -t
ExecStart=/usr/sbin/sshd -D $SSHD_OPTS
ExecReload=/usr/sbin/sshd -t
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=on-failure
RestartPreventExitStatus=255
Type=notify
RuntimeDirectory=sshd
RuntimeDirectoryMode=0755
[Install]
WantedBy=multi-user.target
Alias=sshd.service
Here is mine which works, only thing I changed on ssh.service was the
path to the binary.
# /usr/lib/systemd/system/ssh.service
[Unit]
Description=OpenBSD Secure Shell server
Documentation=man:sshd(8) man:sshd_config(5)
After=network.target auditd.service
ConditionPathExists=!/etc/ssh/sshd_not_to_be_run
[Service]
EnvironmentFile=-/etc/default/ssh
ExecStartPre=/usr/local/sbin/sshd -t
ExecStart=/usr/sbin/sshd -D $SSHD_OPTS
ExecReload=/usr/sbin/sshd -t
ExecReload=/bin/kill -HUP $MAINPID
KillMode=process
Restart=on-failure
RestartPreventExitStatus=255
Type=notify
RuntimeDirectory=sshd
RuntimeDirectoryMode=0755
[Install]
WantedBy=multi-user.target
Alias=sshd.service
Here is from a server with your version, notice it is not listening to 443 even
though I have it in the configuration:
# /usr/lib/systemd/system/ssh.socket
[Unit]
Description=OpenBSD Secure Shell server socket
Before=sockets.target ssh.service
ConditionPathExists=!/etc/ssh/sshd_not_to_be_run
[Socket]
ListenStream=22
Accept=no
FreeBind=yes
[Install]
WantedBy=sockets.target
RequiredBy=ssh.service
Here is from mine: # /usr/lib/systemd/system/ssh.socket
[Unit]
Description=OpenBSD Secure Shell server socket
Before=sockets.target ssh.service
ConditionPathExists=!/etc/ssh/sshd_not_to_be_run
[Socket]
ListenStream=22
Accept=no
FreeBind=yes
[Install]
WantedBy=sockets.target
RequiredBy=ssh.service
# /run/systemd/generator/ssh.socket.d/addresses.conf
# Automatically generated by sshd-socket-generator
[Socket]
ListenStream=
ListenStream=443
ListenStream=22
Notice it listens to port 443 as instructed.
From your version, notice it fails to allocate an X11 domain display
socket:
● ssh.socket - OpenBSD Secure Shell server socket
Loaded: loaded (/usr/lib/systemd/system/ssh.socket; enabled; preset:
enabled)
Active: active (running) since Wed 2025-06-11 17:27:13 PDT; 5 days ago
Triggers: ● ssh.service
Listen: [::]:22 (Stream)
Tasks: 0 (limit: 76666)
Memory: 8.0K (peak: 256.0K)
CPU: 481us
CGroup: /system.slice/ssh.socket
Jun 11 17:27:13 igloo systemd[1]: Listening on ssh.socket - OpenBSD
Secure Shell server socket.
● ssh.service - OpenBSD Secure Shell server
Loaded: loaded (/usr/lib/systemd/system/ssh.service; disabled; preset:
enabled)
Active: active (running) since Thu 2025-06-12 03:42:51 PDT; 4 days ago
TriggeredBy: ● ssh.socket
Docs: man:sshd(8)
man:sshd_config(5)
Process: 3371578 ExecStartPre=/usr/sbin/sshd -t (code=exited,
status=0/SUCCESS)
Main PID: 3371579 (sshd)
Tasks: 1 (limit: 76666)
Memory: 4.9M (peak: 6.3M)
CPU: 154ms
CGroup: /system.slice/ssh.service
└─3371579 "sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups"
Jun 13 17:32:56 igloo sshd[4120297]: pam_unix(sshd:session): session opened for
user root(uid=0) by root(uid=0)
Jun 14 15:44:35 igloo sshd[689282]: Accepted publickey for root from
50.251.249.49 port 54284 ssh2: RSA
SHA256:a5bReJXl7L91eGOuCYugHsY2rn2a0WTDXEBTC93YdmA
Jun 14 15:44:35 igloo sshd[689282]: pam_unix(sshd:session): session opened for
user root(uid=0) by root(uid=0)
Jun 14 15:44:35 igloo sshd[689282]: error: Failed to allocate internet-domain
X11 display socket.
Jun 15 16:44:51 igloo sshd[1231571]: Accepted publickey for root from
50.251.249.49 port 60884 ssh2: RSA
SHA256:a5bReJXl7L91eGOuCYugHsY2rn2a0WTDXEBTC93YdmA
Jun 15 16:44:51 igloo sshd[1231571]: pam_unix(sshd:session): session opened for
user root(uid=0) by root(uid=0)
Jun 15 16:44:51 igloo sshd[1231571]: error: Failed to allocate internet-domain
X11 display socket.
Jun 16 18:05:24 igloo sshd[1800016]: Accepted publickey for root from
50.251.249.49 port 54780 ssh2: RSA
SHA256:a5bReJXl7L91eGOuCYugHsY2rn2a0WTDXEBTC93YdmA
Jun 16 18:05:24 igloo sshd[1800016]: pam_unix(sshd:session): session opened for
user root(uid=0) by root(uid=0)
Jun 16 18:05:24 igloo sshd[1800016]: error: Failed to allocate internet-domain
X11 display socket.
On mine this does not happen:
● ssh.socket - OpenBSD Secure Shell server socket
Loaded: loaded (/usr/lib/systemd/system/ssh.socket; enabled; preset:
enabled)
Drop-In: /run/systemd/generator/ssh.socket.d
└─addresses.conf
Active: active (running) since Fri 2025-06-13 19:33:41 PDT; 2 days ago
Triggers: ● ssh.service
Listen: [::]:443 (Stream)
[::]:22 (Stream)
Tasks: 0 (limit: 8759)
Memory: 12.0K (peak: 264.0K)
CPU: 936us
CGroup: /system.slice/ssh.socket
Jun 13 19:33:41 ubuntu systemd[1]: Listening on ssh.socket - OpenBSD
Secure Shell server socket.
● ssh.service - OpenBSD Secure Shell server
Loaded: loaded (/usr/lib/systemd/system/ssh.service; enabled; preset:
enabled)
Active: active (running) since Fri 2025-06-13 19:33:47 PDT; 2 days ago
TriggeredBy: ● ssh.socket
Docs: man:sshd(8)
man:sshd_config(5)
Process: 1593 ExecStartPre=/usr/local/sbin/sshd -t (code=exited,
status=0/SUCCESS)
Main PID: 1599 (sshd)
Tasks: 37 (limit: 8759)
Memory: 504.9M (peak: 2.7G swap: 1.4M swap peak: 32.8M)
CPU: 5d 2h 18min 12.105s
CGroup: /system.slice/ssh.service
├─ 1599 "sshd: /usr/sbin/sshd -D [listener] 0 of 10-100 startups"
├─ 49311 /bin/bash ./iii
├─ 297412 "sshd: stosh [priv]"
├─ 299016 "sshd: stosh"
├─1510512 /bin/bash ./iii
├─1510513 /bin/bash ./iii
├─1510514 /usr/bin/python3 /home/dca/bin/add.py
├─1510515 sed "s/.*/scale=10;&*13.3336+0.5/"
├─1510517 bc
├─1510518 cut -d. -f1
├─2325938 "sshd: markjr [priv]"
├─2363513 "sshd: markjr@pts/0"
├─2363631 -bash
├─2572712 "sshd: bressler [priv]"
├─2573893 "sshd: bressler@pts/1"
├─2574173 -bash
├─2745898 "sshd: wormey [priv]"
├─2746976 "sshd: wormey@pts/6"
├─2747088 -tcsh
├─3472815 "sshd: bbrace [priv]"
├─3487252 "sshd: bbrace@pts/3"
├─3487499 -bash
├─3496206 alpine
├─3753117 /usr/libexec/geoclue-2.0/demos/agent
├─3929506 "sshd: stosh [priv]"
├─3930969 "sshd: stosh"
├─3990044 "sshd: witters [priv]"
├─3990377 "sshd: witters"
├─4162050 "sshd: luagha [priv]"
├─4178034 "sshd: luagha@pts/5"
├─4178520 -bash
└─4182386 tf shadow
Jun 16 18:10:20 ubuntu sshd[1341578]: Disconnected from user lhowell
71.169.174.67 port 56228
Jun 16 18:10:20 ubuntu sshd[1339336]: pam_unix(sshd:session): session closed
for user lhowell
Jun 16 18:10:23 ubuntu sshd[1351522]: Accepted password for carl from
50.251.249.54 port 51315 ssh2
Jun 16 18:10:23 ubuntu sshd[1351522]: pam_unix(sshd:session): session opened
for user carl(uid=5530) by carl(uid=0)
Jun 16 18:10:23 ubuntu sshd[1351522]: pam_systemd(sshd:session): Failed to
create session: No such process
Jun 16 18:10:26 ubuntu sshd[1351522]: pam_unix(sshd:session): session closed
for user carl
Jun 16 18:10:49 ubuntu sshd[1407341]: Accepted password for carl from
50.54.137.233 port 56619 ssh2
Jun 16 18:10:49 ubuntu sshd[1407341]: pam_unix(sshd:session): session opened
for user carl(uid=5530) by carl(uid=0)
Jun 16 18:10:49 ubuntu sshd[1407341]: pam_systemd(sshd:session): Failed to
create session: No such process
Jun 16 18:10:51 ubuntu sshd[1407341]: pam_unix(sshd:session): session closed
for user carl
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https://bugs.launchpad.net/bugs/2114144
Title:
Openssh Server ignores Port xxx
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