This IP address has been reported a total of
17
times from
16 distinct
sources.
51.81.80.11 was first reported on
, and the most recent report was
.
Recent Reports:
We have received reports of abusive activity from this IP address within the last week. It is
potentially still actively engaged in abusive activities.
Reporter
IoA Timestamp (UTC)
Comment
Categories
Anonymous
2026-07-29 09:52:17,879 fail2ban.actions [17874]: NOTICE [sshd] Ban 51.81.80.11
2026-07-29 1 ...
show more2026-07-29 09:52:17,879 fail2ban.actions [17874]: NOTICE [sshd] Ban 51.81.80.11
2026-07-29 10:41:40,197 fail2ban.actions [17874]: NOTICE [sshd] Ban 51.81.80.11
2026-07-29 11:30:57,042 fail2ban.actions [17874]: NOTICE [sshd] Ban 51.81.80.11
2026-07-29 12:20:06,506 fail2ban.actions [17874]: NOTICE [sshd] Ban 51.81.80.11
2026-07-29 13:09:29,200 fail2ban.actions [17874]: NOTICE [sshd] Ban 51.81.80.11
...
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Repeated attacks detected by Fail2Ban in recidive jail
Hacking
Anonymous
(sshd) Failed SSH login from 51.81.80.11 (US/United States/-): 5 in the last 3600 secs; Ports: *; Di ...
show more(sshd) Failed SSH login from 51.81.80.11 (US/United States/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SSHD; Logs: Jul 29 03:25:59 server5 sshd[4702]: Did not receive identification string from 51.81.80.11
Jul 29 03:32:07 server5 sshd[8447]: Did not receive identification string from 51.81.80.11
Jul 29 03:43:31 server5 sshd[15491]: Did not receive identification string from 51.81.80.11
Jul 29 03:49:36 server5 sshd[19932]: Did not receive identification string from 51.81.80.11
Jul 29 04:00:49 server5 sshd[28981]: Did not receive identification string from 51.81.80.11
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2026-07-29T09:37:10.652992 pclab24.pl sshd[2379665]: Invalid user ubuntu from 51.81.80.11 port 60196 ...
show more2026-07-29T09:37:10.652992 pclab24.pl sshd[2379665]: Invalid user ubuntu from 51.81.80.11 port 60196
2026-07-29T09:37:10.771313 pclab24.pl sshd[2379665]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.81.80.11
2026-07-29T09:37:12.433167 pclab24.pl sshd[2379665]: Failed password for invalid user ubuntu from 51.81.80.11 port 60196 ssh2
2026-07-29T09:54:34.043758 pclab24.pl sshd[2389716]: Connection from 51.81.80.11 port 58024 on 10.10.0.5 port 22
2026-07-29T09:54:34.509082 pclab24.pl sshd[2389716]: Invalid user ubuntu from 51.81.80.11 port 58024
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Report 2580685 with IP 3628252 for SSH brute-force attack by source 3622910 via ssh-honeypot/0.2.0+h ...
show moreReport 2580685 with IP 3628252 for SSH brute-force attack by source 3622910 via ssh-honeypot/0.2.0+http
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SSH Brute force: 1 attempts were recorded from 51.81.80.11
2026-07-29T09:31:17+02:00 Invalid user ub ...
show moreSSH Brute force: 1 attempts were recorded from 51.81.80.11
2026-07-29T09:31:17+02:00 Invalid user ubuntu from 51.81.80.11 port 60030
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Jul 29 03:26:11 authie-ny-5 sshd[668742]: Invalid user ubuntu from 51.81.80.11 port 46682
Jul 29 03: ...
show moreJul 29 03:26:11 authie-ny-5 sshd[668742]: Invalid user ubuntu from 51.81.80.11 port 46682
Jul 29 03:26:11 authie-ny-5 sshd[668742]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.81.80.11
Jul 29 03:26:11 authie-ny-5 sshd[668742]: Invalid user ubuntu from 51.81.80.11 port 46682
Jul 29 03:26:13 authie-ny-5 sshd[668742]: Failed password for invalid user ubuntu from 51.81.80.11 port 46682 ssh2
Jul 29 03:43:44 authie-ny-5 sshd[717458]: Invalid user ubuntu from 51.81.80.11 port 60148
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