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: None

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 <<>> 104.21.66.123
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 65421
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.66.123.			IN	A

;; AUTHORITY SECTION:
.			275	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021700 1800 900 604800 86400

;; Query time: 64 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 01:58:05 CST 2022
;; MSG SIZE  rcvd: 106
Host info
Host 123.66.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 123.66.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
104.154.20.180 attackspambots
[2020-09-09 17:39:53] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T17:39:53.870+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="1745980218-52213582-693732564",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/104.154.20.180/51889",Challenge="1599665993/bba66969114a6633a079db0a4c7f61dd",Response="1aae448624181b2435d3768bb895feeb",ExpectedResponse=""
[2020-09-09 17:39:54] SECURITY[2022] res_security_log.c: SecurityEvent="InvalidAccountID",EventTV="2020-09-09T17:39:54.153+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="222",SessionID="1745980218-52213582-693732564",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/104.154.20.180/51889"
[2020-09-09 17:39:54] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T17:39:54.153+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID
...
2020-09-10 07:01:22
116.90.74.200 attackspambots
[2020-09-09 21:51:44] SECURITY[4624] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T21:51:44.651+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="2104625213-376439237-1800251536",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/116.90.74.200/55774",Challenge="1599681104/b0f92a58bd199502d6854d2e8458fe7f",Response="44d503bd9832e6f47c79117ad8b41816",ExpectedResponse=""
[2020-09-09 21:51:45] SECURITY[4624] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T21:51:45.248+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="2104625213-376439237-1800251536",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/116.90.74.200/55774",Challenge="1599681104/b0f92a58bd199502d6854d2e8458fe7f",Response="d1333522c4776af2dafe06fbca7302de",ExpectedResponse=""
[2020-09-09 21:51:45] SECURITY[4624] res_security_log.c: SecurityEvent="ChallengeR
...
2020-09-10 07:00:37
49.233.77.12 attack
Sep  9 09:46:43 pixelmemory sshd[578430]: Failed password for root from 49.233.77.12 port 49816 ssh2
Sep  9 09:49:30 pixelmemory sshd[578880]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.233.77.12  user=root
Sep  9 09:49:32 pixelmemory sshd[578880]: Failed password for root from 49.233.77.12 port 55580 ssh2
Sep  9 09:52:17 pixelmemory sshd[579352]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.233.77.12  user=root
Sep  9 09:52:18 pixelmemory sshd[579352]: Failed password for root from 49.233.77.12 port 33146 ssh2
...
2020-09-10 06:38:57
142.4.22.236 attackbots
142.4.22.236 - - [09/Sep/2020:19:47:37 +0200] "GET /wp-login.php HTTP/1.1" 200 9184 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
142.4.22.236 - - [09/Sep/2020:19:47:41 +0200] "POST /wp-login.php HTTP/1.1" 200 9435 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
142.4.22.236 - - [09/Sep/2020:19:47:43 +0200] "POST /xmlrpc.php HTTP/1.1" 200 427 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
2020-09-10 06:52:09
34.91.150.112 attackbots
/wp-login.php
2020-09-10 06:58:45
222.186.180.41 attackbots
Sep 10 02:00:22 ift sshd\[33077\]: Failed password for root from 222.186.180.41 port 18224 ssh2Sep 10 02:00:25 ift sshd\[33077\]: Failed password for root from 222.186.180.41 port 18224 ssh2Sep 10 02:00:28 ift sshd\[33077\]: Failed password for root from 222.186.180.41 port 18224 ssh2Sep 10 02:00:32 ift sshd\[33077\]: Failed password for root from 222.186.180.41 port 18224 ssh2Sep 10 02:00:35 ift sshd\[33077\]: Failed password for root from 222.186.180.41 port 18224 ssh2
...
2020-09-10 07:03:30
51.254.205.6 attack
Sep  9 20:54:37 sso sshd[18834]: Failed password for root from 51.254.205.6 port 58994 ssh2
...
2020-09-10 06:50:06
106.13.231.103 attack
Sep  9 20:52:27 marvibiene sshd[22614]: Failed password for root from 106.13.231.103 port 57808 ssh2
2020-09-10 06:52:33
52.186.167.96 attack
Unauthorized SSH connection attempt
2020-09-10 06:33:03
101.96.143.79 attackbotsspam
2020-09-09T18:47:51.245341amanda2.illicoweb.com sshd\[45903\]: Invalid user nx from 101.96.143.79 port 13122
2020-09-09T18:47:51.248042amanda2.illicoweb.com sshd\[45903\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=101.96.143.79
2020-09-09T18:47:53.069253amanda2.illicoweb.com sshd\[45903\]: Failed password for invalid user nx from 101.96.143.79 port 13122 ssh2
2020-09-09T18:52:18.628387amanda2.illicoweb.com sshd\[46065\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=101.96.143.79  user=root
2020-09-09T18:52:20.770787amanda2.illicoweb.com sshd\[46065\]: Failed password for root from 101.96.143.79 port 40946 ssh2
...
2020-09-10 06:37:31
137.74.171.160 attackspambots
Sep  9 20:58:49 sso sshd[19324]: Failed password for root from 137.74.171.160 port 45678 ssh2
...
2020-09-10 06:50:56
189.150.58.135 attack
1599670356 - 09/09/2020 18:52:36 Host: 189.150.58.135/189.150.58.135 Port: 445 TCP Blocked
2020-09-10 06:26:45
140.143.136.41 attack
SSH Brute Force
2020-09-10 06:43:52
139.59.38.142 attackbots
sshd jail - ssh hack attempt
2020-09-10 06:53:57
106.12.182.38 attackspambots
$f2bV_matches
2020-09-10 06:33:55

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