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: United States

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 <<>> 104.21.4.21
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 62169
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.4.21.			IN	A

;; AUTHORITY SECTION:
.			234	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021602 1800 900 604800 86400

;; Query time: 16 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Thu Feb 17 10:09:11 CST 2022
;; MSG SIZE  rcvd: 104
Host info
Host 21.4.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 21.4.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
138.219.201.42 attack
Oct  4 05:11:02 mail.srvfarm.net postfix/smtpd[714208]: warning: porta42.santana.internettelecom.com.br[138.219.201.42]: SASL PLAIN authentication failed: 
Oct  4 05:11:02 mail.srvfarm.net postfix/smtpd[714208]: lost connection after AUTH from porta42.santana.internettelecom.com.br[138.219.201.42]
Oct  4 05:15:57 mail.srvfarm.net postfix/smtps/smtpd[727896]: warning: porta42.santana.internettelecom.com.br[138.219.201.42]: SASL PLAIN authentication failed: 
Oct  4 05:15:57 mail.srvfarm.net postfix/smtps/smtpd[727896]: lost connection after AUTH from porta42.santana.internettelecom.com.br[138.219.201.42]
Oct  4 05:16:16 mail.srvfarm.net postfix/smtpd[727586]: warning: porta42.santana.internettelecom.com.br[138.219.201.42]: SASL PLAIN authentication failed:
2020-10-04 13:01:03
128.199.225.104 attackbots
Brute%20Force%20SSH
2020-10-04 12:41:17
185.132.53.145 attackspam
2020-10-04T00:19:55.319686snf-827550 sshd[7118]: Invalid user oracle from 185.132.53.145 port 41440
2020-10-04T00:19:56.654396snf-827550 sshd[7118]: Failed password for invalid user oracle from 185.132.53.145 port 41440 ssh2
2020-10-04T00:19:58.686112snf-827550 sshd[7120]: Invalid user nagios from 185.132.53.145 port 48806
...
2020-10-04 12:52:42
201.231.115.87 attack
2020-10-04T03:31:11.690819abusebot-8.cloudsearch.cf sshd[8586]: Invalid user user1 from 201.231.115.87 port 61250
2020-10-04T03:31:11.697193abusebot-8.cloudsearch.cf sshd[8586]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=87-115-231-201.fibertel.com.ar
2020-10-04T03:31:11.690819abusebot-8.cloudsearch.cf sshd[8586]: Invalid user user1 from 201.231.115.87 port 61250
2020-10-04T03:31:13.795000abusebot-8.cloudsearch.cf sshd[8586]: Failed password for invalid user user1 from 201.231.115.87 port 61250 ssh2
2020-10-04T03:39:44.816224abusebot-8.cloudsearch.cf sshd[8772]: Invalid user cgw from 201.231.115.87 port 32257
2020-10-04T03:39:44.822736abusebot-8.cloudsearch.cf sshd[8772]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=87-115-231-201.fibertel.com.ar
2020-10-04T03:39:44.816224abusebot-8.cloudsearch.cf sshd[8772]: Invalid user cgw from 201.231.115.87 port 32257
2020-10-04T03:39:47.346392abusebot-8.clouds
...
2020-10-04 12:47:22
51.81.119.1 attackspam
Multiport scan : 6 ports scanned 80(x2) 443(x3) 465(x2) 3074(x4) 3478 8080(x2)
2020-10-04 12:53:33
51.178.50.20 attackspambots
51.178.50.20 (FR/France/-), 6 distributed sshd attacks on account [root] in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_DISTATTACK; Logs: Oct  4 00:05:51 jbs1 sshd[6076]: Failed password for root from 35.203.92.223 port 32912 ssh2
Oct  4 00:06:40 jbs1 sshd[6424]: Failed password for root from 128.199.225.104 port 49456 ssh2
Oct  4 00:06:38 jbs1 sshd[6424]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=128.199.225.104  user=root
Oct  4 00:07:15 jbs1 sshd[6940]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.144.157.242  user=root
Oct  4 00:07:17 jbs1 sshd[6940]: Failed password for root from 185.144.157.242 port 57120 ssh2
Oct  4 00:09:23 jbs1 sshd[8460]: Failed password for root from 51.178.50.20 port 53720 ssh2

IP Addresses Blocked:

35.203.92.223 (US/United States/-)
128.199.225.104 (SG/Singapore/-)
185.144.157.242 (US/United States/-)
2020-10-04 12:34:27
40.69.101.174 attack
Oct  3 22:23:30 web01.agentur-b-2.de postfix/smtpd[1085509]: NOQUEUE: reject: RCPT from unknown[40.69.101.174]: 450 4.7.1 : Helo command rejected: Host not found; from=<> to= proto=ESMTP helo=
Oct  3 22:25:36 web01.agentur-b-2.de postfix/smtpd[1085420]: NOQUEUE: reject: RCPT from unknown[40.69.101.174]: 450 4.7.1 : Helo command rejected: Host not found; from=<> to= proto=ESMTP helo=
Oct  3 22:27:52 web01.agentur-b-2.de postfix/smtpd[1085479]: NOQUEUE: reject: RCPT from unknown[40.69.101.174]: 450 4.7.1 : Helo command rejected: Host not found; from=<> to= proto=ESMTP helo=
Oct  3 22:29:52 web01.agentur-b-2.de postfix/smtpd[1085479]: NOQUEUE: reject: RCPT from unknown[40.69.101.174]: 450 4.7.1 : Helo command rejected: Host not found; from=<> to= proto=ESMTP helo=
2020-10-04 13:03:46
222.239.28.177 attackspam
$f2bV_matches
2020-10-04 12:55:48
185.40.241.179 attackspam
Oct  3 22:36:10 mail.srvfarm.net postfix/smtps/smtpd[664799]: warning: unknown[185.40.241.179]: SASL PLAIN authentication failed: 
Oct  3 22:36:11 mail.srvfarm.net postfix/smtps/smtpd[664799]: lost connection after AUTH from unknown[185.40.241.179]
Oct  3 22:38:01 mail.srvfarm.net postfix/smtpd[661686]: warning: unknown[185.40.241.179]: SASL PLAIN authentication failed: 
Oct  3 22:38:01 mail.srvfarm.net postfix/smtpd[661686]: lost connection after AUTH from unknown[185.40.241.179]
Oct  3 22:40:21 mail.srvfarm.net postfix/smtpd[660363]: warning: unknown[185.40.241.179]: SASL PLAIN authentication failed:
2020-10-04 12:58:23
123.149.211.140 attackbots
[SID2] Fail2ban detected 5 failed SSH login attempts within 30 minutes. This report was submitted automatically.
2020-10-04 12:54:36
112.85.42.110 attackbots
Oct  4 06:27:37 vps647732 sshd[8731]: Failed password for root from 112.85.42.110 port 51362 ssh2
Oct  4 06:27:53 vps647732 sshd[8731]: error: maximum authentication attempts exceeded for root from 112.85.42.110 port 51362 ssh2 [preauth]
...
2020-10-04 12:29:18
212.179.226.196 attackspam
Oct  4 06:17:48 haigwepa sshd[4081]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=212.179.226.196 
Oct  4 06:17:50 haigwepa sshd[4081]: Failed password for invalid user oracle from 212.179.226.196 port 54600 ssh2
...
2020-10-04 12:27:33
186.89.248.169 attackbotsspam
Icarus honeypot on github
2020-10-04 12:36:25
139.59.211.245 attackspambots
detected by Fail2Ban
2020-10-04 12:36:51
124.156.102.254 attack
Oct  3 21:57:00 ws22vmsma01 sshd[50567]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=124.156.102.254
Oct  3 21:57:02 ws22vmsma01 sshd[50567]: Failed password for invalid user userftp from 124.156.102.254 port 57968 ssh2
Oct  3 22:06:04 ws22vmsma01 sshd[52852]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=124.156.102.254
Oct  3 22:06:06 ws22vmsma01 sshd[52852]: Failed password for invalid user user2 from 124.156.102.254 port 44660 ssh2
...
2020-10-04 12:32:29

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