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: Hungary

Internet Service Provider: unknown

Hostname: unknown

Organization: unknown

Usage Type: unknown

Comments:
No discussion about this IP yet. Click above link to make one.
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 91.83.115.21
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 18382
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;91.83.115.21.			IN	A

;; AUTHORITY SECTION:
.			30	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2025022200 1800 900 604800 86400

;; Query time: 15 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Sat Feb 22 21:24:42 CST 2025
;; MSG SIZE  rcvd: 105
Host info
Host 21.115.83.91.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 21.115.83.91.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
5.142.51.81 attack
Lines containing failures of 5.142.51.81
Nov  5 15:32:10 shared10 sshd[32491]: Invalid user admin from 5.142.51.81 port 46714
Nov  5 15:32:10 shared10 sshd[32491]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.142.51.81
Nov  5 15:32:12 shared10 sshd[32491]: Failed password for invalid user admin from 5.142.51.81 port 46714 ssh2


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=5.142.51.81
2019-11-05 22:50:47
109.123.117.247 attackbots
DNS Enumeration
2019-11-05 22:48:03
191.195.154.183 attack
Nov  5 15:34:27 mx01 sshd[21514]: reveeclipse mapping checking getaddrinfo for 191-195-154-183.user.vivozap.com.br [191.195.154.183] failed - POSSIBLE BREAK-IN ATTEMPT!
Nov  5 15:34:27 mx01 sshd[21514]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=191.195.154.183  user=r.r
Nov  5 15:34:29 mx01 sshd[21514]: Failed password for r.r from 191.195.154.183 port 12192 ssh2
Nov  5 15:34:29 mx01 sshd[21514]: Received disconnect from 191.195.154.183: 11: Bye Bye [preauth]
Nov  5 15:34:31 mx01 sshd[21518]: reveeclipse mapping checking getaddrinfo for 191-195-154-183.user.vivozap.com.br [191.195.154.183] failed - POSSIBLE BREAK-IN ATTEMPT!
Nov  5 15:34:32 mx01 sshd[21518]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=191.195.154.183  user=r.r
Nov  5 15:34:34 mx01 sshd[21518]: Failed password for r.r from 191.195.154.183 port 12193 ssh2
Nov  5 15:34:34 mx01 sshd[21518]: Received disconnect from 191........
-------------------------------
2019-11-05 22:55:46
145.131.32.100 attackbots
port scan and connect, tcp 1433 (ms-sql-s)
2019-11-05 23:09:21
85.38.164.51 attackspam
Nov  5 09:31:46 ny01 sshd[23902]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=85.38.164.51
Nov  5 09:31:48 ny01 sshd[23902]: Failed password for invalid user tom from 85.38.164.51 port 42338 ssh2
Nov  5 09:41:30 ny01 sshd[24746]: Failed password for root from 85.38.164.51 port 41607 ssh2
2019-11-05 23:07:23
103.15.140.141 attack
email spam
2019-11-05 22:43:01
142.93.106.197 attackspambots
port scan and connect, tcp 5432 (postgresql)
2019-11-05 23:12:29
146.185.25.176 attackbots
DNS Enumeration
2019-11-05 23:08:59
114.67.80.161 attackbots
SSH Brute Force, server-1 sshd[12756]: Failed password for root from 114.67.80.161 port 49505 ssh2
2019-11-05 23:18:28
132.255.187.240 attackspambots
email spam
2019-11-05 22:38:20
211.159.152.252 attack
SSH Brute Force, server-1 sshd[13262]: Failed password for invalid user admin2 from 211.159.152.252 port 12053 ssh2
2019-11-05 23:16:39
185.53.88.76 attackspambots
\[2019-11-05 10:05:54\] SECURITY\[2634\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-11-05T10:05:54.467-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="9441603976936",SessionID="0x7fdf2c0eb718",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.53.88.76/57817",ACLName="no_extension_match"
\[2019-11-05 10:08:03\] SECURITY\[2634\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-11-05T10:08:03.807-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="011441603976936",SessionID="0x7fdf2c4c1948",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.53.88.76/53183",ACLName="no_extension_match"
\[2019-11-05 10:10:06\] SECURITY\[2634\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-11-05T10:10:06.530-0500",Severity="Error",Service="SIP",EventVersion="1",AccountID="9011441603976936",SessionID="0x7fdf2c7dcb28",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.53.88.76/54638",ACLName="no_extensi
2019-11-05 23:17:09
149.156.155.88 attackspam
2019-11-05T14:41:59.749553abusebot-8.cloudsearch.cf sshd\[24629\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=pyrtek.mech.pk.edu.pl  user=root
2019-11-05 22:46:07
103.229.45.170 attackspam
email spam
2019-11-05 22:41:43
220.92.16.102 attack
$f2bV_matches
2019-11-05 23:16:00

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