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 <<>> 104.21.57.21
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 17737
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.57.21.			IN	A

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

;; Query time: 25 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 00:32:54 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 21.57.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 21.57.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
179.109.89.136 attackspam
Automatic report - Port Scan Attack
2020-02-19 23:07:01
2001:ee0:4bab:d7d0:9c38:25a5:8c65:e899 attackspam
WordPress wp-login brute force :: 2001:ee0:4bab:d7d0:9c38:25a5:8c65:e899 0.068 BYPASS [19/Feb/2020:13:37:07  0000] [censored_2] "POST /wp-login.php HTTP/1.1" 200 2254 "https://[censored_2]/wp-login.php" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.169 Safari/537.36"
2020-02-19 23:02:15
104.206.128.2 attack
Fail2Ban Ban Triggered
2020-02-19 23:32:03
2607:f298:5:100f::c7b:8e31 attackspam
Automatically reported by fail2ban report script (mx1)
2020-02-19 23:00:23
181.224.229.127 attack
445/tcp
[2020-02-19]1pkt
2020-02-19 23:01:06
185.209.0.51 attackbots
02/19/2020-09:10:43.880813 185.209.0.51 Protocol: 6 ET DROP Dshield Block Listed Source group 1
2020-02-19 23:13:40
200.56.45.49 attackspambots
Feb 19 15:51:11 silence02 sshd[16648]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=200.56.45.49
Feb 19 15:51:13 silence02 sshd[16648]: Failed password for invalid user chenlihong from 200.56.45.49 port 53984 ssh2
Feb 19 15:54:05 silence02 sshd[16830]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=200.56.45.49
2020-02-19 22:56:50
93.2.114.243 attackbots
81/tcp
[2020-02-19]1pkt
2020-02-19 23:35:22
89.248.168.217 attackspambots
89.248.168.217 was recorded 5 times by 5 hosts attempting to connect to the following ports: 41030. Incident counter (4h, 24h, all-time): 5, 17, 18394
2020-02-19 23:11:41
165.22.208.85 attack
4433/tcp
[2020-02-19]1pkt
2020-02-19 23:12:32
182.126.55.236 attackbotsspam
port scan and connect, tcp 23 (telnet)
2020-02-19 23:03:30
222.186.31.166 attackspam
Feb 19 16:18:54 dcd-gentoo sshd[30020]: User root from 222.186.31.166 not allowed because none of user's groups are listed in AllowGroups
Feb 19 16:18:58 dcd-gentoo sshd[30020]: error: PAM: Authentication failure for illegal user root from 222.186.31.166
Feb 19 16:18:54 dcd-gentoo sshd[30020]: User root from 222.186.31.166 not allowed because none of user's groups are listed in AllowGroups
Feb 19 16:18:58 dcd-gentoo sshd[30020]: error: PAM: Authentication failure for illegal user root from 222.186.31.166
Feb 19 16:18:54 dcd-gentoo sshd[30020]: User root from 222.186.31.166 not allowed because none of user's groups are listed in AllowGroups
Feb 19 16:18:58 dcd-gentoo sshd[30020]: error: PAM: Authentication failure for illegal user root from 222.186.31.166
Feb 19 16:18:58 dcd-gentoo sshd[30020]: Failed keyboard-interactive/pam for invalid user root from 222.186.31.166 port 62817 ssh2
...
2020-02-19 23:22:45
106.13.230.219 attackspam
Feb 19 16:10:40 ns381471 sshd[26998]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.230.219
Feb 19 16:10:42 ns381471 sshd[26998]: Failed password for invalid user asterisk from 106.13.230.219 port 60168 ssh2
2020-02-19 23:28:18
85.140.63.21 attack
Feb 19 13:36:55 ws25vmsma01 sshd[36802]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=85.140.63.21
Feb 19 13:36:57 ws25vmsma01 sshd[36802]: Failed password for invalid user centos from 85.140.63.21 port 40909 ssh2
...
2020-02-19 23:15:44
125.44.73.151 attack
23/tcp
[2020-02-19]1pkt
2020-02-19 22:53:54

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