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 <<>> 104.237.55.21
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 29332
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.237.55.21.			IN	A

;; AUTHORITY SECTION:
.			10	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2022021701 1800 900 604800 86400

;; Query time: 87 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 03:48:46 CST 2022
;; MSG SIZE  rcvd: 106
Host info
21.55.237.104.in-addr.arpa domain name pointer 104-237-55-21.static.webnx.com.
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

Non-authoritative answer:
21.55.237.104.in-addr.arpa	name = 104-237-55-21.static.webnx.com.

Authoritative answers can be found from:
Related IP info:
Related comments:
IP Type Details Datetime
51.38.71.174 attackspambots
Apr  5 15:32:36 server1 sshd\[4527\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.71.174  user=root
Apr  5 15:32:38 server1 sshd\[4527\]: Failed password for root from 51.38.71.174 port 48616 ssh2
Apr  5 15:37:40 server1 sshd\[5835\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.71.174  user=root
Apr  5 15:37:42 server1 sshd\[5835\]: Failed password for root from 51.38.71.174 port 34920 ssh2
Apr  5 15:42:31 server1 sshd\[7266\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.71.174  user=root
...
2020-04-06 06:04:30
222.186.175.217 attack
2020-04-06T00:01:56.032700rocketchat.forhosting.nl sshd[8618]: Failed password for root from 222.186.175.217 port 39362 ssh2
2020-04-06T00:01:59.050978rocketchat.forhosting.nl sshd[8618]: Failed password for root from 222.186.175.217 port 39362 ssh2
2020-04-06T00:02:02.937442rocketchat.forhosting.nl sshd[8618]: Failed password for root from 222.186.175.217 port 39362 ssh2
...
2020-04-06 06:08:43
122.114.157.7 attack
Apr  5 17:39:25 Tower sshd[41383]: Connection from 122.114.157.7 port 54746 on 192.168.10.220 port 22 rdomain ""
Apr  5 17:39:26 Tower sshd[41383]: Failed password for root from 122.114.157.7 port 54746 ssh2
Apr  5 17:39:27 Tower sshd[41383]: Received disconnect from 122.114.157.7 port 54746:11: Bye Bye [preauth]
Apr  5 17:39:27 Tower sshd[41383]: Disconnected from authenticating user root 122.114.157.7 port 54746 [preauth]
2020-04-06 06:03:17
83.134.192.199 attackspambots
SSH invalid-user multiple login try
2020-04-06 05:52:59
210.227.113.18 attackspambots
Apr  5 23:39:43 [HOSTNAME] sshd[28713]: User **removed** from 210.227.113.18 not allowed because not listed in AllowUsers
Apr  5 23:39:43 [HOSTNAME] sshd[28713]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=210.227.113.18  user=**removed**
Apr  5 23:39:45 [HOSTNAME] sshd[28713]: Failed password for invalid user **removed** from 210.227.113.18 port 44010 ssh2
...
2020-04-06 06:07:41
188.41.241.69 attackspam
Apr  6 00:04:01 meumeu sshd[27901]: Failed password for git from 188.41.241.69 port 56568 ssh2
Apr  6 00:06:20 meumeu sshd[28191]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=188.41.241.69 
Apr  6 00:06:22 meumeu sshd[28191]: Failed password for invalid user test from 188.41.241.69 port 34872 ssh2
...
2020-04-06 06:09:06
139.59.161.78 attackspam
Brute force attempt
2020-04-06 06:01:17
51.83.72.243 attack
Apr  5 23:22:56 Ubuntu-1404-trusty-64-minimal sshd\[20658\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.83.72.243  user=root
Apr  5 23:22:57 Ubuntu-1404-trusty-64-minimal sshd\[20658\]: Failed password for root from 51.83.72.243 port 34690 ssh2
Apr  5 23:36:51 Ubuntu-1404-trusty-64-minimal sshd\[32304\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.83.72.243  user=root
Apr  5 23:36:53 Ubuntu-1404-trusty-64-minimal sshd\[32304\]: Failed password for root from 51.83.72.243 port 32950 ssh2
Apr  5 23:40:11 Ubuntu-1404-trusty-64-minimal sshd\[2210\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.83.72.243  user=root
2020-04-06 05:43:59
134.175.102.133 attackspam
Apr  5 23:30:28 srv206 sshd[19516]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=134.175.102.133  user=root
Apr  5 23:30:30 srv206 sshd[19516]: Failed password for root from 134.175.102.133 port 35704 ssh2
Apr  5 23:40:01 srv206 sshd[19581]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=134.175.102.133  user=root
Apr  5 23:40:03 srv206 sshd[19581]: Failed password for root from 134.175.102.133 port 55360 ssh2
...
2020-04-06 05:49:08
152.32.216.240 attackspam
Apr  5 23:36:15 * sshd[32734]: Failed password for root from 152.32.216.240 port 53320 ssh2
2020-04-06 05:52:07
139.162.115.221 attackbotsspam
firewall-block, port(s): 9000/tcp
2020-04-06 05:47:10
203.230.6.175 attackbotsspam
Apr  6 05:32:24 f sshd\[31616\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=203.230.6.175  user=root
Apr  6 05:32:26 f sshd\[31616\]: Failed password for root from 203.230.6.175 port 44192 ssh2
Apr  6 05:38:47 f sshd\[31752\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=203.230.6.175  user=root
...
2020-04-06 05:48:24
138.204.78.249 attack
Brute force SMTP login attempted.
...
2020-04-06 05:48:50
51.77.194.232 attackspambots
$f2bV_matches
2020-04-06 06:06:01
178.32.221.142 attack
Apr  5 23:30:20 vpn01 sshd[20531]: Failed password for root from 178.32.221.142 port 47321 ssh2
...
2020-04-06 06:04:02

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