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: Spain

Internet Service Provider: Telefonica de Espana Sau

Hostname: unknown

Organization: unknown

Usage Type: unknown

Comments:
Type Details Datetime
attackbots
Lines containing failures of 81.37.31.161
Oct  4 22:25:02 dns01 sshd[28623]: Did not receive identification string from 81.37.31.161 port 61620
Oct  4 22:25:05 dns01 sshd[28625]: Invalid user sniffer from 81.37.31.161 port 62012
Oct  4 22:25:05 dns01 sshd[28625]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=81.37.31.161
Oct  4 22:25:07 dns01 sshd[28625]: Failed password for invalid user sniffer from 81.37.31.161 port 62012 ssh2
Oct  4 22:25:07 dns01 sshd[28625]: Connection closed by invalid user sniffer 81.37.31.161 port 62012 [preauth]


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=81.37.31.161
2020-10-06 04:13:33
attackspam
Lines containing failures of 81.37.31.161
Oct  4 22:25:02 dns01 sshd[28623]: Did not receive identification string from 81.37.31.161 port 61620
Oct  4 22:25:05 dns01 sshd[28625]: Invalid user sniffer from 81.37.31.161 port 62012
Oct  4 22:25:05 dns01 sshd[28625]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=81.37.31.161
Oct  4 22:25:07 dns01 sshd[28625]: Failed password for invalid user sniffer from 81.37.31.161 port 62012 ssh2
Oct  4 22:25:07 dns01 sshd[28625]: Connection closed by invalid user sniffer 81.37.31.161 port 62012 [preauth]


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=81.37.31.161
2020-10-05 20:12:21
attack
Lines containing failures of 81.37.31.161
Oct  4 22:25:02 dns01 sshd[28623]: Did not receive identification string from 81.37.31.161 port 61620
Oct  4 22:25:05 dns01 sshd[28625]: Invalid user sniffer from 81.37.31.161 port 62012
Oct  4 22:25:05 dns01 sshd[28625]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=81.37.31.161
Oct  4 22:25:07 dns01 sshd[28625]: Failed password for invalid user sniffer from 81.37.31.161 port 62012 ssh2
Oct  4 22:25:07 dns01 sshd[28625]: Connection closed by invalid user sniffer 81.37.31.161 port 62012 [preauth]


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=81.37.31.161
2020-10-05 12:04:15
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 81.37.31.161
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 44232
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

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

;; AUTHORITY SECTION:
.			433	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2020100401 1800 900 604800 86400

;; Query time: 69 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Mon Oct 05 12:04:10 CST 2020
;; MSG SIZE  rcvd: 116
Host info
161.31.37.81.in-addr.arpa domain name pointer 161.red-81-37-31.dynamicip.rima-tde.net.
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

Non-authoritative answer:
161.31.37.81.in-addr.arpa	name = 161.red-81-37-31.dynamicip.rima-tde.net.

Authoritative answers can be found from:
Related IP info:
Related comments:
IP Type Details Datetime
220.134.13.28 attackspambots
Honeypot attack, port: 81, PTR: 220-134-13-28.HINET-IP.hinet.net.
2020-06-22 00:46:32
102.186.28.46 attack
Honeypot attack, port: 445, PTR: PTR record not found
2020-06-22 00:16:30
186.112.80.114 attackspambots
Honeypot attack, port: 445, PTR: PTR record not found
2020-06-22 00:42:32
137.74.159.147 attackspam
Brute-force attempt banned
2020-06-22 00:32:03
222.186.3.249 attackbots
Jun 21 17:56:16 OPSO sshd\[11822\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.3.249  user=root
Jun 21 17:56:18 OPSO sshd\[11822\]: Failed password for root from 222.186.3.249 port 28048 ssh2
Jun 21 17:56:21 OPSO sshd\[11822\]: Failed password for root from 222.186.3.249 port 28048 ssh2
Jun 21 17:56:24 OPSO sshd\[11822\]: Failed password for root from 222.186.3.249 port 28048 ssh2
Jun 21 18:00:16 OPSO sshd\[12606\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.3.249  user=root
2020-06-22 00:12:50
202.51.110.214 attackbotsspam
Jun 21 15:52:58 game-panel sshd[25471]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=202.51.110.214
Jun 21 15:53:00 game-panel sshd[25471]: Failed password for invalid user cma from 202.51.110.214 port 55531 ssh2
Jun 21 15:56:41 game-panel sshd[25587]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=202.51.110.214
2020-06-22 00:25:23
49.48.125.29 attackbots
port scan and connect, tcp 23 (telnet)
2020-06-22 00:10:07
119.96.127.218 attackbotsspam
Jun 21 14:13:40 srv1 postfix/smtpd[27421]: warning: unknown[119.96.127.218]: SASL LOGIN authentication failed: authentication failure
Jun 21 14:13:43 srv1 postfix/smtpd[27422]: warning: unknown[119.96.127.218]: SASL LOGIN authentication failed: authentication failure
Jun 21 14:13:44 srv1 postfix/smtpd[27428]: warning: unknown[119.96.127.218]: SASL LOGIN authentication failed: authentication failure
Jun 21 14:13:45 srv1 postfix/smtpd[27422]: warning: unknown[119.96.127.218]: SASL LOGIN authentication failed: authentication failure
Jun 21 14:13:47 srv1 postfix/smtpd[27428]: warning: unknown[119.96.127.218]: SASL LOGIN authentication failed: authentication failure
...
2020-06-22 00:17:28
201.191.203.154 attackbots
Jun 21 18:22:55 sip sshd[727200]: Invalid user lds from 201.191.203.154 port 39336
Jun 21 18:22:56 sip sshd[727200]: Failed password for invalid user lds from 201.191.203.154 port 39336 ssh2
Jun 21 18:24:49 sip sshd[727205]: Invalid user delete from 201.191.203.154 port 56156
...
2020-06-22 00:42:00
109.162.245.174 attack
Unauthorized IMAP connection attempt
2020-06-22 00:18:51
46.38.145.248 attack
2020-06-21 16:14:32 auth_plain authenticator failed for (User) [46.38.145.248]: 535 Incorrect authentication data (set_id=deanne@csmailer.org)
2020-06-21 16:15:13 auth_plain authenticator failed for (User) [46.38.145.248]: 535 Incorrect authentication data (set_id=xray@csmailer.org)
2020-06-21 16:15:54 auth_plain authenticator failed for (User) [46.38.145.248]: 535 Incorrect authentication data (set_id=danielle@csmailer.org)
2020-06-21 16:16:38 auth_plain authenticator failed for (User) [46.38.145.248]: 535 Incorrect authentication data (set_id=apus@csmailer.org)
2020-06-21 16:17:21 auth_plain authenticator failed for (User) [46.38.145.248]: 535 Incorrect authentication data (set_id=halo@csmailer.org)
...
2020-06-22 00:25:05
122.51.167.108 attackspam
2020-06-21T15:33:54.513791lavrinenko.info sshd[20595]: Failed password for invalid user sdp from 122.51.167.108 port 34866 ssh2
2020-06-21T15:38:18.012421lavrinenko.info sshd[20749]: Invalid user khalid from 122.51.167.108 port 58944
2020-06-21T15:38:18.022550lavrinenko.info sshd[20749]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=122.51.167.108
2020-06-21T15:38:18.012421lavrinenko.info sshd[20749]: Invalid user khalid from 122.51.167.108 port 58944
2020-06-21T15:38:20.095792lavrinenko.info sshd[20749]: Failed password for invalid user khalid from 122.51.167.108 port 58944 ssh2
...
2020-06-22 00:22:38
197.3.89.28 attack
1592741607 - 06/21/2020 14:13:27 Host: 197.3.89.28/197.3.89.28 Port: 445 TCP Blocked
2020-06-22 00:34:40
183.62.139.167 attackbots
Jun 21 08:32:22 mail sshd\[2048\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=183.62.139.167  user=root
...
2020-06-22 00:31:45
138.68.95.204 attackbotsspam
Jun 21 17:23:11 buvik sshd[8809]: Failed password for invalid user ljf from 138.68.95.204 port 48098 ssh2
Jun 21 17:26:24 buvik sshd[9266]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=138.68.95.204  user=root
Jun 21 17:26:26 buvik sshd[9266]: Failed password for root from 138.68.95.204 port 47598 ssh2
...
2020-06-22 00:50:45

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