vyos@cr01b-vyos:~$ show log all | grep -i ssh | head
Jun 25 02:11:22 localhost live-config[618]:  keyboard-configuration ssl-cert util-linux login openssh-server.
Jun 25 02:11:22 localhost systemd[1]: Starting LSB: AWS EC2 instance init script to fetch and load ssh public key...
Jun 25 02:11:22 localhost systemd[1]: Started LSB: AWS EC2 instance init script to fetch and load ssh public key.
Jun 24 21:13:13 cr01b-vyos sshd[6149]: /etc/ssh/sshd_config line 49: missing address
Jun 24 21:13:13 cr01b-vyos systemd[1]: ssh.service: Control process exited, code=exited, status=255/EXCEPTION
Jun 24 21:13:13 cr01b-vyos systemd[1]: ssh.service: Failed with result 'exit-code'.
Jun 24 21:13:14 cr01b-vyos systemd[1]: ssh.service: Service RestartSec=100ms expired, scheduling restart.
Jun 24 21:13:14 cr01b-vyos systemd[1]: ssh.service: Scheduled restart job, restart counter is at 1.
Jun 24 21:13:14 cr01b-vyos sshd[6151]: /etc/ssh/sshd_config line 49: missing address
Jun 24 21:13:14 cr01b-vyos systemd[1]: ssh.service: Control process exited, code=exited, status=255/EXCEPTION

vyos@cr01b-vyos# show service ssh
 disable-host-validation
 listen-address 192.168.15.4
 listen-address fd52:d62e:8011:6e:192:168:15:4
 port 53490
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vyos@cr01b-vyos# cat /etc/ssh/sshd_config                                                                                                                                                                          
### Autogenerated by ssh.py ###                                                                                                                                                                                    
                                                                                                                                                                                                                   
# https://linux.die.net/man/5/sshd_config                                                                                                                                                                          
                                                                                                                                                                                                                   
#                                                                                                                                                                                                                  
# Non-configurable defaults                                                                                                                                                                                        
#                                                                                                                                                                                                                  
Protocol 2
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_dsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
SyslogFacility AUTH
LoginGraceTime 120
StrictModes yes
PubkeyAuthentication yes
IgnoreRhosts yes
HostbasedAuthentication no
PermitEmptyPasswords no
ChallengeResponseAuthentication no
X11Forwarding yes
X11DisplayOffset 10
PrintMotd no
PrintLastLog yes
TCPKeepAlive yes
Banner /etc/issue.net
Subsystem sftp /usr/lib/openssh/sftp-server
UsePAM yes
PermitRootLogin no

#
# User configurable section
#

# Look up remote host name and check that the resolved host name for the remote IP
# address maps back to the very same IP address.
UseDNS no

# Specifies the port number that sshd(8) listens on
Port 53490

# Gives the verbosity level that is used when logging messages from sshd
LogLevel INFO

# Specifies whether password authentication is allowed
PasswordAuthentication yes

# Specifies the local addresses sshd should listen on
ListenAddress
ListenAddress





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