This IP address has been reported a total of
605
times from
256 distinct
sources.
51.81.171.148 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.
2026-07-26 22:47:30.025064-0500 localhost sshd-session[45602]: Failed password for root from 51.81. ...
show more2026-07-26 22:47:30.025064-0500 localhost sshd-session[45602]: Failed password for root from 51.81.171.148 port 41228 ssh2
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2026-07-27T05:36:24.051119+02:00 froxlor sshd[2603823]: Failed password for root from 51.81.171.148 ...
show more2026-07-27T05:36:24.051119+02:00 froxlor sshd[2603823]: Failed password for root from 51.81.171.148 port 50564 ssh2
2026-07-27T05:40:36.783770+02:00 froxlor sshd[2605195]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.81.171.148 user=root
2026-07-27T05:40:38.427878+02:00 froxlor sshd[2605195]: Failed password for root from 51.81.171.148 port 42916 ssh2
2026-07-27T05:41:20.079137+02:00 froxlor sshd[2605239]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.81.171.148 user=root
2026-07-27T05:41:22.430684+02:00 froxlor sshd[2605239]: Failed password for root from 51.81.171.148 port 60536 ssh2
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SSH
Anonymous
2026-07-27T05:22:54.773433 mail2.akcurate.de sshd-session[98427]: Connection closed by authenticatin ...
show more2026-07-27T05:22:54.773433 mail2.akcurate.de sshd-session[98427]: Connection closed by authenticating user root 51.81.171.148 port 58278 [preauth]
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2026-07-27T05:07:52.359064+02:00 web03.agentur-b-2.de sshd-session[3039538]: Invalid user dtwwirtsch ...
show more2026-07-27T05:07:52.359064+02:00 web03.agentur-b-2.de sshd-session[3039538]: Invalid user dtwwirtschaftstreuhand from 51.81.171.148 port 35670
2026-07-27T05:07:52.532963+02:00 web03.agentur-b-2.de sshd-session[3039538]: Connection closed by invalid user dtwwirtschaftstreuhand 51.81.171.148 port 35670 [preauth]
2026-07-27T05:07:53.658676+02:00 web03.agentur-b-2.de sshd-session[3039541]: Invalid user %domain% from 51.81.171.148 port 36058
2026-07-27T05:07:53.835525+02:00 web03.agentur-b-2.de sshd-session[3039541]: Connection closed by invalid user %domain% 51.81.171.148 port 36058 [preauth]
2026-07-27T05:13:27.929521+02:00 web03.agentur-b-2.de sshd-session[3043734]: Connection closed by authenticating user root 51.81.171.148 port 50966 [preauth]
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2026-07-27T05:06:07.195021+02:00 phishsim sshd[957910]: Invalid user balicek from 51.81.171.148 port ...
show more2026-07-27T05:06:07.195021+02:00 phishsim sshd[957910]: Invalid user balicek from 51.81.171.148 port 57582
2026-07-27T05:06:08.416190+02:00 phishsim sshd[957912]: Invalid user %domain% from 51.81.171.148 port 58038
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2026-07-27T03:00:49.396867+00:00 ubuntu sshd[3437679]: Invalid user hoefnatuurlijk from 51.81.171.14 ...
show more2026-07-27T03:00:49.396867+00:00 ubuntu sshd[3437679]: Invalid user hoefnatuurlijk from 51.81.171.148 port 33454
2026-07-27T03:00:50.554720+00:00 ubuntu sshd[3437687]: Invalid user %domain% from 51.81.171.148 port 33886
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Jul 27 04:45:10 CyberGecko sshd[965382]: Invalid user %domain% from 51.81.171.148 port 41360
Jul 27 ...
show moreJul 27 04:45:10 CyberGecko sshd[965382]: Invalid user %domain% from 51.81.171.148 port 41360
Jul 27 04:45:10 CyberGecko sshd[965382]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.81.171.148
Jul 27 04:45:10 CyberGecko sshd[965382]: Invalid user %domain% from 51.81.171.148 port 41360
Jul 27 04:45:12 CyberGecko sshd[965382]: Failed password for invalid user %domain% from 51.81.171.148 port 41360 ssh2
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2026-07-26 21:32:30.377311-0500 localhost sshd-session[11607]: Failed password for invalid user %do ...
show more2026-07-26 21:32:30.377311-0500 localhost sshd-session[11607]: Failed password for invalid user %domain% from 51.81.171.148 port 33524 ssh2
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2026-07-27T05:32:12.668473whm11.palvelukanava.fi sshd[463854]: Invalid user %domain% from 51.81.171. ...
show more2026-07-27T05:32:12.668473whm11.palvelukanava.fi sshd[463854]: Invalid user %domain% from 51.81.171.148 port 41570
2026-07-27T05:32:12.884841whm11.palvelukanava.fi sshd[463854]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.81.171.148
2026-07-27T05:32:15.121677whm11.palvelukanava.fi sshd[463854]: Failed password for invalid user %domain% from 51.81.171.148 port 41570 ssh2
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Brute-Force
SSH
Anonymous
2026-07-27T04:21:42.190697+02:00 PRACSNew sshd-session[1485476]: pam_unix(sshd:auth): authentication ...
show more2026-07-27T04:21:42.190697+02:00 PRACSNew sshd-session[1485476]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.81.171.148
2026-07-27T04:21:44.287333+02:00 PRACSNew sshd-session[1485476]: Failed password for invalid user devhell from 51.81.171.148 port 55988 ssh2
2026-07-27T04:21:47.232150+02:00 PRACSNew sshd-session[1485548]: Invalid user %domain% from 51.81.171.148 port 57778
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Jul 27 03:34:23 mcb-it sshd[1073070]: Invalid user %domain% from 51.81.171.148 port 45556
Jul 27 03: ...
show moreJul 27 03:34:23 mcb-it sshd[1073070]: Invalid user %domain% from 51.81.171.148 port 45556
Jul 27 03:34:23 mcb-it sshd[1073070]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.81.171.148
Jul 27 03:34:25 mcb-it sshd[1073070]: Failed password for invalid user %domain% from 51.81.171.148 port 45556 ssh2
Jul 27 04:19:13 mcb-it sshd[1075738]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.81.171.148 user=kabikaba
Jul 27 04:19:15 mcb-it sshd[1075738]: Failed password for kabikaba from 51.81.171.148 port 42282 ssh2
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Brute-Force
SSH
Anonymous
2026-07-27T04:14:54.988327 mail2.akcurate.de sshd-session[96206]: Invalid user akcurate from 51.81.1 ...
show more2026-07-27T04:14:54.988327 mail2.akcurate.de sshd-session[96206]: Invalid user akcurate from 51.81.171.148 port 55482
2026-07-27T04:14:55.146993 mail2.akcurate.de sshd-session[96206]: Connection closed by invalid user akcurate 51.81.171.148 port 55482 [preauth]
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2026-07-27T03:43:44.677738+02:00 web03.agentur-b-2.de sshd-session[2983124]: Invalid user ibanatiaca ...
show more2026-07-27T03:43:44.677738+02:00 web03.agentur-b-2.de sshd-session[2983124]: Invalid user ibanatiacademy from 51.81.171.148 port 43300
2026-07-27T03:43:44.857127+02:00 web03.agentur-b-2.de sshd-session[2983124]: Connection closed by invalid user ibanatiacademy 51.81.171.148 port 43300 [preauth]
2026-07-27T03:43:46.172390+02:00 web03.agentur-b-2.de sshd-session[2983599]: Invalid user %domain% from 51.81.171.148 port 44370
2026-07-27T03:43:46.348363+02:00 web03.agentur-b-2.de sshd-session[2983599]: Connection closed by invalid user %domain% 51.81.171.148 port 44370 [preauth]
2026-07-27T03:50:40.691092+02:00 web03.agentur-b-2.de sshd-session[2988071]: Invalid user rbshueckeswagen from 51.81.171.148 port 55048
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