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IP Abuse Reports for 122.51.81.21:
This IP address has been reported a total of
16
times from
16 distinct
sources.
122.51.81.21 was first reported on
, and the most recent report was
.
In the last 60 days, the top reporter locations were:
Finland
with 6
reports;
France
with 3
reports;
Germany
with 2
reports.
The most common categories in these recent reports were:
Brute-Force
14
times;
SSH
11
times;
Port Scan
1
time;
Bad Web Bot
1
time;
Web App Attack
1
time.
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.
2026-09-10T07:17:54.301457+00:00 az100-jp sshd[668499]: Invalid user ubuntu from 122.51.81.21 port 4 ...
show more2026-09-10T07:17:54.301457+00:00 az100-jp sshd[668499]: Invalid user ubuntu from 122.51.81.21 port 44002
2026-09-10T07:17:55.977819+00:00 az100-jp sshd[668501]: Invalid user fa from 122.51.81.21 port 44010
2026-09-10T07:17:57.203785+00:00 az100-jp sshd[668503]: Invalid user admin from 122.51.81.21 port 44018
2026-09-10T07:18:01.435327+00:00 az100-jp sshd[668507]: Invalid user git from 122.51.81.21 port 44022
2026-09-10T07:18:02.055130+00:00 az100-jp sshd[668509]: Invalid user test from 122.51.81.21 port 58290
...
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SSH brute-force / unauthorized pre-auth probing against production node Manual-Audit. Filtered & dro ...
show moreSSH brute-force / unauthorized pre-auth probing against production node Manual-Audit. Filtered & dropped by iptables. Raw audit:
Manual audit command trigger
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2026-09-10T01:35:24.338252+02:00 Linux10 sshd-session[2342776]: Failed password for invalid user fa ...
show more2026-09-10T01:35:24.338252+02:00 Linux10 sshd-session[2342776]: Failed password for invalid user fa from 122.51.81.21 port 45306 ssh2
2026-09-10T01:35:26.601853+02:00 Linux10 sshd-session[2342915]: Invalid user admin from 122.51.81.21 port 45316
2026-09-10T01:35:26.840328+02:00 Linux10 sshd-session[2342915]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=122.51.81.21
2026-09-10T01:35:28.955258+02:00 Linux10 sshd-session[2342915]: Failed password for invalid user admin from 122.51.81.21 port 45316 ssh2
2026-09-10T01:35:31.869979+02:00 Linux10 sshd-session[2343135]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=122.51.81.21 user=root
2026-09-10T01:35:34.314301+02:00 Linux10 sshd-session[2343135]: Failed password for root from 122.51.81.21 port 41348 ssh2
2026-09-10T01:35:37.749318+02:00 Linux10 sshd-session[2343332]: Invalid user git from 122.51.81.21 port 41350
2026-09-10T01:35:38.450671+02:00 Linux10 ss
...
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Brute-Force
SSH
Anonymous
Sep 10 01:36:47 fi7 sshd[1336373]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid= ...
show moreSep 10 01:36:47 fi7 sshd[1336373]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=122.51.81.21
Sep 10 01:36:49 fi7 sshd[1336373]: Failed password for invalid user ubuntu from 122.51.81.21 port 40648 ssh2
Sep 10 01:36:53 fi7 sshd[1336375]: Invalid user fa from 122.51.81.21 port 41470
...
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2026-09-10T01:03:29.829637+02:00 crma sshd[2886818]: Invalid user fa from 122.51.81.21 port 51368
20 ...
show more2026-09-10T01:03:29.829637+02:00 crma sshd[2886818]: Invalid user fa from 122.51.81.21 port 51368
2026-09-10T01:03:42.978919+02:00 crma sshd[2886839]: Invalid user admin from 122.51.81.21 port 43716
2026-09-10T01:04:03.941902+02:00 crma sshd[2887257]: Invalid user git from 122.51.81.21 port 34308
2026-09-10T01:04:10.528018+02:00 crma sshd[2887318]: Invalid user test from 122.51.81.21 port 34322
2026-09-10T01:04:34.710309+02:00 crma sshd[2887320]: Invalid user ubuntu from 122.51.81.21 port 39808
...
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CN_MAINT-CNNIC-AP_<33>1723557491 [1:2010935:3] ET SCAN Suspicious inbound to MSSQL port 1433 [Classi ...
show moreCN_MAINT-CNNIC-AP_<33>1723557491 [1:2010935:3] ET SCAN Suspicious inbound to MSSQL port 1433 [Classification: Potentially Bad Traffic] [Priority: 2] {TCP} 122.51.81.21:50666
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