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 <<>> 104.21.57.131
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 11984
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.57.131.			IN	A

;; AUTHORITY SECTION:
.			480	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021702 1800 900 604800 86400

;; Query time: 87 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 10:14:01 CST 2022
;; MSG SIZE  rcvd: 106
Host info
Host 131.57.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 131.57.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
45.181.228.1 attackbots
Invalid user dst from 45.181.228.1 port 1227
2020-07-25 00:42:21
202.137.154.252 attackbots
Dovecot Invalid User Login Attempt.
2020-07-25 01:10:45
220.132.251.235 attack
220.132.251.235 - - [24/Jul/2020:13:46:12 +0000] "GET / HTTP/1.1" 400 166 "-" "-"
2020-07-25 01:04:55
200.66.117.134 attackspam
Jul 24 12:27:58 mail.srvfarm.net postfix/smtpd[2217477]: warning: unknown[200.66.117.134]: SASL PLAIN authentication failed: 
Jul 24 12:27:58 mail.srvfarm.net postfix/smtpd[2217477]: lost connection after AUTH from unknown[200.66.117.134]
Jul 24 12:35:26 mail.srvfarm.net postfix/smtps/smtpd[2233237]: warning: unknown[200.66.117.134]: SASL PLAIN authentication failed: 
Jul 24 12:35:27 mail.srvfarm.net postfix/smtps/smtpd[2233237]: lost connection after AUTH from unknown[200.66.117.134]
Jul 24 12:35:32 mail.srvfarm.net postfix/smtps/smtpd[2233107]: warning: unknown[200.66.117.134]: SASL PLAIN authentication failed:
2020-07-25 01:18:49
14.37.145.34 attack
Honeypot attack, port: 81, PTR: PTR record not found
2020-07-25 01:07:08
140.86.39.162 attackbotsspam
Jul 24 07:04:23 mockhub sshd[11109]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=140.86.39.162
Jul 24 07:04:26 mockhub sshd[11109]: Failed password for invalid user tomas from 140.86.39.162 port 46502 ssh2
...
2020-07-25 01:06:12
182.155.44.17 attack
1595598379 - 07/24/2020 15:46:19 Host: 182.155.44.17/182.155.44.17 Port: 445 TCP Blocked
2020-07-25 00:56:21
1.164.13.180 attackbots
Unauthorized connection attempt from IP address 1.164.13.180 on Port 445(SMB)
2020-07-25 01:15:29
176.237.189.163 attackspambots
Honeypot attack, port: 5555, PTR: PTR record not found
2020-07-25 00:50:38
51.79.84.101 attack
Jul 24 10:30:14 server1 sshd\[4373\]: Failed password for invalid user admin from 51.79.84.101 port 45718 ssh2
Jul 24 10:34:57 server1 sshd\[5697\]: Invalid user testserver from 51.79.84.101
Jul 24 10:34:57 server1 sshd\[5697\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.79.84.101 
Jul 24 10:34:59 server1 sshd\[5697\]: Failed password for invalid user testserver from 51.79.84.101 port 58446 ssh2
Jul 24 10:39:34 server1 sshd\[7137\]: Invalid user bdn from 51.79.84.101
...
2020-07-25 00:49:34
34.68.132.197 attackspambots
"XSS Attack Detected via libinjection - Matched Data: XSS data found within ARGS_NAMES:
2020-07-25 00:55:32
122.179.128.206 attackbotsspam
Unauthorized connection attempt from IP address 122.179.128.206 on Port 445(SMB)
2020-07-25 01:07:57
186.251.211.48 attackbotsspam
Jul 24 13:03:28 mail.srvfarm.net postfix/smtps/smtpd[2242306]: warning: unknown[186.251.211.48]: SASL PLAIN authentication failed: 
Jul 24 13:03:29 mail.srvfarm.net postfix/smtps/smtpd[2242306]: lost connection after AUTH from unknown[186.251.211.48]
Jul 24 13:06:28 mail.srvfarm.net postfix/smtps/smtpd[2240038]: warning: unknown[186.251.211.48]: SASL PLAIN authentication failed: 
Jul 24 13:06:29 mail.srvfarm.net postfix/smtps/smtpd[2240038]: lost connection after AUTH from unknown[186.251.211.48]
Jul 24 13:13:09 mail.srvfarm.net postfix/smtps/smtpd[2240150]: warning: unknown[186.251.211.48]: SASL PLAIN authentication failed:
2020-07-25 01:20:51
222.252.21.40 attackbotsspam
Unauthorized connection attempt from IP address 222.252.21.40 on Port 445(SMB)
2020-07-25 01:02:33
117.239.217.46 attackspam
Unauthorized connection attempt from IP address 117.239.217.46 on Port 445(SMB)
2020-07-25 01:17:39

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