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: unknown

Region: unknown

Country: Russian Federation

Internet Service Provider: OJSC North-West Telecom

Hostname: unknown

Organization: unknown

Usage Type: Fixed Line ISP

Comments:
Type Details Datetime
attack
Jun  4 14:50:02 server5 sshd[24605]: User admin from 5.142.81.18 not allowed because not listed in AllowUsers
Jun  4 14:50:02 server5 sshd[24605]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.142.81.18  user=admin
Jun  4 14:50:05 server5 sshd[24605]: Failed password for invalid user admin from 5.142.81.18 port 45429 ssh2
Jun  4 14:50:05 server5 sshd[24605]: Connection closed by 5.142.81.18 port 45429 [preauth]


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=5.142.81.18
2020-06-05 01:05:07
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 5.142.81.18
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 50820
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

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

;; AUTHORITY SECTION:
.			347	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2020060400 1800 900 604800 86400

;; Query time: 45 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Jun 05 01:04:59 CST 2020
;; MSG SIZE  rcvd: 115
Host info
18.81.142.5.in-addr.arpa domain name pointer ip-018-081-142-5.pools.atnet.ru.
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

Non-authoritative answer:
18.81.142.5.in-addr.arpa	name = ip-018-081-142-5.pools.atnet.ru.

Authoritative answers can be found from:
Related IP info:
Related comments:
IP Type Details Datetime
37.139.1.197 attack
Sep 28 20:18:05 ovpn sshd\[14356\]: Invalid user ali from 37.139.1.197
Sep 28 20:18:05 ovpn sshd\[14356\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.139.1.197
Sep 28 20:18:07 ovpn sshd\[14356\]: Failed password for invalid user ali from 37.139.1.197 port 42731 ssh2
Sep 28 20:29:11 ovpn sshd\[2441\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.139.1.197  user=root
Sep 28 20:29:13 ovpn sshd\[2441\]: Failed password for root from 37.139.1.197 port 38631 ssh2
2020-09-29 06:18:17
82.64.132.50 attackbotsspam
Sep 28 13:30:01 s158375 sshd[8457]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=82.64.132.50
2020-09-29 06:17:23
91.134.13.250 attackbotsspam
5x Failed Password
2020-09-29 06:00:27
51.77.212.179 attackbotsspam
Invalid user cron from 51.77.212.179 port 33030
2020-09-29 05:52:54
131.161.255.6 attack
2020-09-28T23:49:49+02:00  exim[22493]: fixed_login authenticator failed for (ADMIN) [131.161.255.6]: 535 Incorrect authentication data (set_id=admin@eu.hu)
2020-09-29 06:13:30
193.233.141.132 attack
0,84-01/27 [bc01/m23] PostRequest-Spammer scoring: zurich
2020-09-29 06:28:04
104.131.42.61 attack
Invalid user kfk from 104.131.42.61 port 39612
2020-09-29 06:03:56
168.90.89.35 attackspam
SSH login attempts.
2020-09-29 06:28:53
162.243.128.224 attackspam
TCP port : 3389
2020-09-29 06:08:34
43.229.153.13 attackbots
Invalid user nikhil from 43.229.153.13 port 33389
2020-09-29 06:30:05
167.99.7.149 attack
Port Scan
...
2020-09-29 06:14:31
192.241.238.16 attackspam
SSH login attempts.
2020-09-29 06:23:14
119.165.12.54 attackbots
20/9/27@16:38:09: FAIL: IoT-Telnet address from=119.165.12.54
...
2020-09-29 06:29:35
82.64.153.14 attack
2020-09-28T23:26:11.383750ks3355764 sshd[19885]: Invalid user redmine from 82.64.153.14 port 37916
2020-09-28T23:26:13.595500ks3355764 sshd[19885]: Failed password for invalid user redmine from 82.64.153.14 port 37916 ssh2
...
2020-09-29 06:12:16
121.48.165.121 attackbotsspam
2020-09-28T21:02:25.753093vps1033 sshd[7771]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.48.165.121
2020-09-28T21:02:25.747319vps1033 sshd[7771]: Invalid user gopher from 121.48.165.121 port 35794
2020-09-28T21:02:27.516287vps1033 sshd[7771]: Failed password for invalid user gopher from 121.48.165.121 port 35794 ssh2
2020-09-28T21:04:53.609272vps1033 sshd[12949]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.48.165.121  user=root
2020-09-28T21:04:56.026326vps1033 sshd[12949]: Failed password for root from 121.48.165.121 port 38482 ssh2
...
2020-09-29 06:01:35

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