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No reports in the last 60 days
91.192.81.53 has been reported 52
times. The most recent report is from
.
The full history is preserved below and remains searchable. A
0% score reflects the absence of recent activity, but
this is not a guarantee that earlier reports were invalid. Abuse confidence score decays,
naturally, over time, when the abusive activity stops.
Jan 15 10:07:56 vpn sshd[3426645]: Invalid user def from 91.192.81.53 port 53192
Jan 15 10:09:46 vpn sshd[3426995]: Invalid user caddy from 91.192.81.53 port 53260
Jan 15 10:11:05 vpn sshd[3427292]: Invalid user naztec from 91.192.81.53 port 53340
.. ...
show moreJan 15 10:07:56 vpn sshd[3426645]: Invalid user def from 91.192.81.53 port 53192
Jan 15 10:09:46 vpn sshd[3426995]: Invalid user caddy from 91.192.81.53 port 53260
Jan 15 10:11:05 vpn sshd[3427292]: Invalid user naztec from 91.192.81.53 port 53340
...
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Jan 15 09:43:52 ka01 sshd[2901327]: Invalid user x from 91.192.81.53 port 42528
Jan 15 09:45:22 ka01 sshd[2902166]: Invalid user guest from 91.192.81.53 port 42590
Jan 15 09:46:01 ka01 sshd[2902319]: Invalid user netgear from 91.192.81.53 port 42644
...
show moreJan 15 09:43:52 ka01 sshd[2901327]: Invalid user x from 91.192.81.53 port 42528
Jan 15 09:45:22 ka01 sshd[2902166]: Invalid user guest from 91.192.81.53 port 42590
Jan 15 09:46:01 ka01 sshd[2902319]: Invalid user netgear from 91.192.81.53 port 42644
Jan 15 09:46:39 ka01 sshd[2902526]: Invalid user vodafone from 91.192.81.53 port 42700
Jan 15 09:47:12 ka01 sshd[2902566]: Invalid user nagiosadmin from 91.192.81.53 port 42754
Jan 15 09:47:47 ka01 sshd[2902697]: Invalid user service from 91.192.81.53 port 42812
Jan 15 09:48:23 ka01 sshd[2902748]: Invalid user wildfly from 91.192.81.53 port 42870
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(sshd) Failed SSH login from 91.192.81.53 (SG/Singapore/virt.reserved.ds): 5 in the last 3600 secs; Ports: *; Direction: 1; Trigger: LF_SSHD; Logs: Jan 15 02:42:03 14014 sshd[15644]: Invalid user x from 91.192.81.53 port 45424
Jan 15 02:42:04 14014 s ...
show more(sshd) Failed SSH login from 91.192.81.53 (SG/Singapore/virt.reserved.ds): 5 in the last 3600 secs; Ports: *; Direction: 1; Trigger: LF_SSHD; Logs: Jan 15 02:42:03 14014 sshd[15644]: Invalid user x from 91.192.81.53 port 45424
Jan 15 02:42:04 14014 sshd[15644]: Failed password for invalid user x from 91.192.81.53 port 45424 ssh2
Jan 15 02:45:12 14014 sshd[15977]: Invalid user guest from 91.192.81.53 port 45506
Jan 15 02:45:14 14014 sshd[15977]: Failed password for invalid user guest from 91.192.81.53 port 45506 ssh2
Jan 15 02:45:50 14014 sshd[16035]: Invalid user netgear from 91.192.81.53 port 45544
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Brute-Force
SSH
Anonymous
2026-01-15T08:17:41.921803+00:00 nyc-worker-01 sshd[1978219]: Invalid user puppet from 91.192.81.53 port 51858
2026-01-15T08:17:42.161363+00:00 nyc-worker-01 sshd[1978219]: Received disconnect from 91.192.81.53 port 51858:11: Bye Bye [preauth]
2026-0 ...
show more2026-01-15T08:17:41.921803+00:00 nyc-worker-01 sshd[1978219]: Invalid user puppet from 91.192.81.53 port 51858
2026-01-15T08:17:42.161363+00:00 nyc-worker-01 sshd[1978219]: Received disconnect from 91.192.81.53 port 51858:11: Bye Bye [preauth]
2026-01-15T08:20:49.865874+00:00 nyc-worker-01 sshd[1984262]: Received disconnect from 91.192.81.53 port 51962:11: Bye Bye [preauth]
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(sshd) Failed SSH login from 91.192.81.53 (SG/Singapore/virt.reserved.ds): 5 in the last 3600 secs; Ports: *; Direction: 1; Trigger: LF_SSHD; Logs: Jan 15 01:51:07 15448 sshd[4989]: Invalid user sonarqube from 91.192.81.53 port 50516
Jan 15 01:51:08 ...
show more(sshd) Failed SSH login from 91.192.81.53 (SG/Singapore/virt.reserved.ds): 5 in the last 3600 secs; Ports: *; Direction: 1; Trigger: LF_SSHD; Logs: Jan 15 01:51:07 15448 sshd[4989]: Invalid user sonarqube from 91.192.81.53 port 50516
Jan 15 01:51:08 15448 sshd[4989]: Failed password for invalid user sonarqube from 91.192.81.53 port 50516 ssh2
Jan 15 01:55:07 15448 sshd[5617]: Invalid user advantech from 91.192.81.53 port 50640
Jan 15 01:55:09 15448 sshd[5617]: Failed password for invalid user advantech from 91.192.81.53 port 50640 ssh2
Jan 15 01:55:45 15448 sshd[5715]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=91.192.81.53 user=cyrus
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Jan 15 07:49:51 gibson-app sshd[1871271]: Invalid user sonarqube from 91.192.81.53 port 57944
Jan 15 07:55:00 gibson-app sshd[1872108]: Invalid user advantech from 91.192.81.53 port 58048
Jan 15 07:55:38 gibson-app sshd[1872312]: Invalid user cyrus f ...
show moreJan 15 07:49:51 gibson-app sshd[1871271]: Invalid user sonarqube from 91.192.81.53 port 57944
Jan 15 07:55:00 gibson-app sshd[1872108]: Invalid user advantech from 91.192.81.53 port 58048
Jan 15 07:55:38 gibson-app sshd[1872312]: Invalid user cyrus from 91.192.81.53 port 58090
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(sshd) Failed SSH login from 91.192.81.53 (SG/Singapore/virt.reserved.ds): 10 in the last 3600 secs
Brute-Force
SSH
Anonymous
Jan 15 08:04:12 C1D543E sshd[1635959]: Invalid user devuser from 91.192.81.53 port 34352
Jan 15 08:04:12 C1D543E sshd[1635959]: Failed password for invalid user devuser from 91.192.81.53 port 34352 ssh2
Jan 15 08:07:52 C1D543E sshd[1636084]: Invalid ...
show moreJan 15 08:04:12 C1D543E sshd[1635959]: Invalid user devuser from 91.192.81.53 port 34352
Jan 15 08:04:12 C1D543E sshd[1635959]: Failed password for invalid user devuser from 91.192.81.53 port 34352 ssh2
Jan 15 08:07:52 C1D543E sshd[1636084]: Invalid user epson from 91.192.81.53 port 34462
Jan 15 08:07:52 C1D543E sshd[1636084]: Failed password for invalid user epson from 91.192.81.53 port 34462 ssh2
Jan 15 08:08:27 C1D543E sshd[1636122]: Invalid user User from 91.192.81.53 port 34536
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