Sshd logs

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sshd[1] secure shell daemon.


Logs: journalctl -u ssh

Authentication related messages:

error: maximum authentication attempts exceeded for root from 10.10.10.110 port 40314 ssh2 [preauth]
Failed password for invalid user USER_NAME from 91.XXX.76.22 port 43522 ssh2
Dec 01 07:01:05 SERVER sshd[15647]: PAM service(sshd) ignoring max retries; 5 > 3 sshd[15647]: PAM service(sshd) ignoring max retries; 5 > 3
See: MaxAuthTries in sshd_config
Dec 11 09:29:36 SERVER sshd[5506]: Received disconnect from 103.217.11.10 port 43200:11: Bye Bye [preauth]
ssh.service: Found left-over process 30050 (sshd) in control group while starting unit. Ignoring.
Unable to negotiate with 55.xxx.455.45 port 30367: no matching cipher found. Their offer: aes256-cbc,[email protected],aes192-cbc,aes128-cbc,arcfour128,arcfour,3des-cbc,none [preauth]
Invalid user USERNAME from 54.xxX.138.126 port 39980


Successful authentication attempts

sshd[17161]: Accepted publickey for USERNAME from
Accepted password for USERNAME from 95.14.XXX.214 port 52731 ssh2

See also

  • https://man.cx/sshd(1)
  • https://serverfault.com/a/608976
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