Must be a valid IPv4 or IPv6 ip address, e.g. 127.0.0.1 or 2001:DB8:0:0:8:800:200C:417A
Basic Info

City: Virton

Region: Wallonia

Country: Belgium

Internet Service Provider: Proximus NV

Hostname: unknown

Organization: unknown

Usage Type: unknown

Comments:
Type Details Datetime
attackspambots
Dec 19 16:22:49 server010 sshd[20356]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=81.242.53.21  user=r.r
Dec 19 16:22:51 server010 sshd[20356]: Failed password for r.r from 81.242.53.21 port 22303 ssh2
Dec 19 16:28:19 server010 sshd[20596]: Invalid user abdulkaf from 81.242.53.21
Dec 19 16:28:19 server010 sshd[20596]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=81.242.53.21
Dec 19 16:28:21 server010 sshd[20596]: Failed password for invalid user abdulkaf from 81.242.53.21 port 17071 ssh2

........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=81.242.53.21
2019-12-20 04:20:18
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 81.242.53.21
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 55612
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;81.242.53.21.			IN	A

;; AUTHORITY SECTION:
.			596	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2019121902 1800 900 604800 86400

;; Query time: 68 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Dec 20 04:20:14 CST 2019
;; MSG SIZE  rcvd: 116
Host info
21.53.242.81.in-addr.arpa domain name pointer 21.53-242-81.adsl-dyn.isp.belgacom.be.
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

Non-authoritative answer:
21.53.242.81.in-addr.arpa	name = 21.53-242-81.adsl-dyn.isp.belgacom.be.

Authoritative answers can be found from:
Related IP info:
Related comments:
IP Type Details Datetime
36.90.26.82 attackspambots
Honeypot attack, port: 445, PTR: PTR record not found
2020-02-20 04:07:04
201.158.35.70 attackspambots
Unauthorized connection attempt from IP address 201.158.35.70 on Port 445(SMB)
2020-02-20 04:01:50
68.183.12.127 attackbotsspam
Feb 19 17:54:26 srv-ubuntu-dev3 sshd[78367]: Invalid user hadoop from 68.183.12.127
Feb 19 17:54:26 srv-ubuntu-dev3 sshd[78367]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=68.183.12.127
Feb 19 17:54:26 srv-ubuntu-dev3 sshd[78367]: Invalid user hadoop from 68.183.12.127
Feb 19 17:54:28 srv-ubuntu-dev3 sshd[78367]: Failed password for invalid user hadoop from 68.183.12.127 port 54800 ssh2
Feb 19 17:57:16 srv-ubuntu-dev3 sshd[78575]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=68.183.12.127  user=daemon
Feb 19 17:57:18 srv-ubuntu-dev3 sshd[78575]: Failed password for daemon from 68.183.12.127 port 56230 ssh2
Feb 19 18:00:14 srv-ubuntu-dev3 sshd[78866]: Invalid user gitlab-psql from 68.183.12.127
Feb 19 18:00:14 srv-ubuntu-dev3 sshd[78866]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=68.183.12.127
Feb 19 18:00:14 srv-ubuntu-dev3 sshd[78866]: Invalid user gitl
...
2020-02-20 04:03:01
125.64.94.211 attack
19.02.2020 19:52:24 Connection to port 6379 blocked by firewall
2020-02-20 04:06:13
107.200.127.153 attackbots
2020-02-19T14:32:02.6529951240 sshd\[21610\]: Invalid user pi from 107.200.127.153 port 52424
2020-02-19T14:32:02.7658561240 sshd\[21612\]: Invalid user pi from 107.200.127.153 port 52426
2020-02-19T14:32:02.7827601240 sshd\[21610\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=107.200.127.153
...
2020-02-20 04:36:22
218.102.237.252 attack
Honeypot attack, port: 5555, PTR: pcd705252.netvigator.com.
2020-02-20 04:13:37
59.124.22.218 attackbotsspam
Feb 19 20:51:45 gw1 sshd[23602]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=59.124.22.218
Feb 19 20:51:46 gw1 sshd[23602]: Failed password for invalid user tengyan from 59.124.22.218 port 52511 ssh2
...
2020-02-20 04:12:15
124.156.109.210 attackspam
$f2bV_matches
2020-02-20 04:05:12
107.189.10.174 attackbotsspam
Invalid user fake from 107.189.10.174 port 48974
2020-02-20 04:32:15
202.57.160.131 attackbots
Feb 19 19:21:47 XXXXXX sshd[12319]: Invalid user shinken from 202.57.160.131 port 34796
2020-02-20 04:22:47
45.225.140.139 attackbotsspam
Honeypot attack, port: 4567, PTR: PTR record not found
2020-02-20 04:04:21
46.217.67.1 attackbots
Unauthorized connection attempt from IP address 46.217.67.1 on Port 445(SMB)
2020-02-20 04:00:12
103.98.204.235 attack
Unauthorized connection attempt from IP address 103.98.204.235 on Port 445(SMB)
2020-02-20 04:05:26
52.14.28.35 attackspam
(sshd) Failed SSH login from 52.14.28.35 (US/United States/ec2-52-14-28-35.us-east-2.compute.amazonaws.com): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: Feb 19 15:10:31 host sshd[22794]: Invalid user vmail from 52.14.28.35 port 50362
2020-02-20 04:32:28
14.245.53.232 attackbots
Honeypot attack, port: 81, PTR: static.vnpt.vn.
2020-02-20 04:22:09

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