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 <<>> 104.21.4.81
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 49636
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.4.81.			IN	A

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

;; Query time: 79 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Thu Feb 17 21:51:51 CST 2022
;; MSG SIZE  rcvd: 104
Host info
Host 81.4.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 81.4.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
87.246.7.14 attackbots
Authentication failed
2020-04-07 13:38:07
71.121.232.187 attack
Apr  6 18:49:05 php1 sshd\[17770\]: Invalid user oracle from 71.121.232.187
Apr  6 18:49:05 php1 sshd\[17770\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=71.121.232.187
Apr  6 18:49:08 php1 sshd\[17770\]: Failed password for invalid user oracle from 71.121.232.187 port 52426 ssh2
Apr  6 18:52:29 php1 sshd\[18086\]: Invalid user postgres from 71.121.232.187
Apr  6 18:52:29 php1 sshd\[18086\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=71.121.232.187
2020-04-07 13:06:10
200.13.195.70 attackspambots
SSH Bruteforce attack
2020-04-07 13:20:17
45.133.99.8 attackbots
Apr  7 07:09:35 websrv1.aknwsrv.net postfix/smtpd[130491]: warning: unknown[45.133.99.8]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr  7 07:09:35 websrv1.aknwsrv.net postfix/smtpd[130491]: lost connection after AUTH from unknown[45.133.99.8]
Apr  7 07:09:44 websrv1.aknwsrv.net postfix/smtpd[131004]: lost connection after AUTH from unknown[45.133.99.8]
Apr  7 07:09:55 websrv1.aknwsrv.net postfix/smtpd[130491]: warning: unknown[45.133.99.8]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Apr  7 07:09:55 websrv1.aknwsrv.net postfix/smtpd[130491]: lost connection after AUTH from unknown[45.133.99.8]
2020-04-07 13:41:04
68.183.102.246 attackbots
$f2bV_matches
2020-04-07 13:30:57
218.92.0.178 attackspambots
Apr  6 19:04:37 web1 sshd\[720\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.178  user=root
Apr  6 19:04:39 web1 sshd\[720\]: Failed password for root from 218.92.0.178 port 12992 ssh2
Apr  6 19:04:42 web1 sshd\[720\]: Failed password for root from 218.92.0.178 port 12992 ssh2
Apr  6 19:04:52 web1 sshd\[720\]: Failed password for root from 218.92.0.178 port 12992 ssh2
Apr  6 19:05:01 web1 sshd\[761\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.178  user=root
2020-04-07 13:15:16
187.188.90.141 attackspam
Apr  7 06:26:19 mout sshd[12720]: Invalid user teamspeak from 187.188.90.141 port 59808
2020-04-07 13:13:22
181.40.122.2 attackspambots
$f2bV_matches
2020-04-07 13:44:39
63.82.48.244 attack
Apr  7 05:48:13 web01.agentur-b-2.de postfix/smtpd[69922]: NOQUEUE: reject: RCPT from unknown[63.82.48.244]: 450 4.7.1 : Helo command rejected: Host not found; from= to= proto=ESMTP helo=
Apr  7 05:51:20 web01.agentur-b-2.de postfix/smtpd[69922]: NOQUEUE: reject: RCPT from unknown[63.82.48.244]: 450 4.7.1 : Helo command rejected: Host not found; from= to= proto=ESMTP helo=
Apr  7 05:51:51 web01.agentur-b-2.de postfix/smtpd[72776]: NOQUEUE: reject: RCPT from unknown[63.82.48.244]: 450 4.7.1 : Helo command rejected: Host not found; from= to= proto=ESMTP helo=
Apr  7 05:53:53 web01.agentur-b-2.de postfix/smtpd[72776]: NOQUEUE: reject: RCPT from unknown[63.82.
2020-04-07 13:39:45
61.6.244.146 attackspam
(imapd) Failed IMAP login from 61.6.244.146 (BN/Brunei/146-244.adsl.static.espeed.com.bn): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: Apr  7 08:24:10 ir1 dovecot[566034]: imap-login: Disconnected (auth failed, 1 attempts in 5 secs): user=, method=PLAIN, rip=61.6.244.146, lip=5.63.12.44, TLS, session=
2020-04-07 13:02:59
212.81.57.24 attack
Apr  7 05:20:17 mail.srvfarm.net postfix/smtpd[892831]: NOQUEUE: reject: RCPT from unknown[212.81.57.24]: 554 5.7.1 Service unavailable; Client host [212.81.57.24] blocked using zen.spamhaus.org; https://www.spamhaus.org/sbl/query/SBLCSS / https://www.spamhaus.org/sbl/query/SBL440932; from= to= proto=ESMTP helo=
Apr  7 05:20:42 mail.srvfarm.net postfix/smtpd[905526]: NOQUEUE: reject: RCPT from unknown[212.81.57.24]: 554 5.7.1 Service unavailable; Client host [212.81.57.24] blocked using zen.spamhaus.org; https://www.spamhaus.org/sbl/query/SBLCSS / https://www.spamhaus.org/sbl/query/SBL440932; from= to= proto=ESMTP helo=
Apr  7 05:25:38 mail.srvfarm.net postfix/smtpd[889425]: NOQUEUE: reject: RCPT from unknown[212.81.57.24]: 554 5.7.1 Service unavailable; Client host [212.81.57.24] blocked using zen.spamhaus.org; https://www.spamhaus.org/sbl/query/SBLCSS / https://www.s
2020-04-07 13:34:30
148.251.195.14 attack
20 attempts against mh-misbehave-ban on flare
2020-04-07 13:11:06
103.66.96.254 attackbotsspam
2020-04-07T06:01:46.385196struts4.enskede.local sshd\[26548\]: Invalid user yuleima from 103.66.96.254 port 35926
2020-04-07T06:01:46.391374struts4.enskede.local sshd\[26548\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.66.96.254
2020-04-07T06:01:49.297403struts4.enskede.local sshd\[26548\]: Failed password for invalid user yuleima from 103.66.96.254 port 35926 ssh2
2020-04-07T06:03:54.104083struts4.enskede.local sshd\[26573\]: Invalid user ark from 103.66.96.254 port 61426
2020-04-07T06:03:54.110098struts4.enskede.local sshd\[26573\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.66.96.254
...
2020-04-07 13:47:28
198.27.90.106 attackbots
2020-04-07T03:53:28.446757upcloud.m0sh1x2.com sshd[28169]: Invalid user redmine from 198.27.90.106 port 48222
2020-04-07 13:06:35
124.88.37.161 attack
k+ssh-bruteforce
2020-04-07 13:03:54

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