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 <<>> 104.21.51.81
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 19991
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.51.81.			IN	A

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

;; Query time: 88 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 10:12:32 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 81.51.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 81.51.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
157.230.14.226 attack
Aug 15 11:28:23 localhost sshd\[586\]: Invalid user debian from 157.230.14.226
Aug 15 11:28:23 localhost sshd\[586\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=157.230.14.226
Aug 15 11:28:25 localhost sshd\[586\]: Failed password for invalid user debian from 157.230.14.226 port 33174 ssh2
Aug 15 11:38:09 localhost sshd\[1059\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=157.230.14.226  user=root
Aug 15 11:38:11 localhost sshd\[1059\]: Failed password for root from 157.230.14.226 port 47450 ssh2
...
2019-08-15 17:39:13
167.71.110.223 attack
Aug 15 11:25:48 v22019058497090703 sshd[1173]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.71.110.223
Aug 15 11:25:50 v22019058497090703 sshd[1173]: Failed password for invalid user he from 167.71.110.223 port 52482 ssh2
Aug 15 11:30:07 v22019058497090703 sshd[1565]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.71.110.223
...
2019-08-15 17:58:02
187.44.113.33 attack
Aug 15 01:22:03 nextcloud sshd\[6144\]: Invalid user rm from 187.44.113.33
Aug 15 01:22:03 nextcloud sshd\[6144\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=187.44.113.33
Aug 15 01:22:05 nextcloud sshd\[6144\]: Failed password for invalid user rm from 187.44.113.33 port 36994 ssh2
...
2019-08-15 17:26:44
106.12.206.148 attack
Aug 14 23:13:24 friendsofhawaii sshd\[1038\]: Invalid user orauat from 106.12.206.148
Aug 14 23:13:24 friendsofhawaii sshd\[1038\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.206.148
Aug 14 23:13:26 friendsofhawaii sshd\[1038\]: Failed password for invalid user orauat from 106.12.206.148 port 52834 ssh2
Aug 14 23:19:17 friendsofhawaii sshd\[1513\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.206.148  user=www-data
Aug 14 23:19:19 friendsofhawaii sshd\[1513\]: Failed password for www-data from 106.12.206.148 port 43638 ssh2
2019-08-15 17:27:32
58.219.129.162 attackbots
Automatic report - Port Scan Attack
2019-08-15 17:59:00
213.32.18.189 attackspambots
Automatic report - Banned IP Access
2019-08-15 18:51:01
46.101.72.145 attackspam
Aug 15 00:21:11 php1 sshd\[21410\]: Invalid user elf from 46.101.72.145
Aug 15 00:21:11 php1 sshd\[21410\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=kallealanen.fi
Aug 15 00:21:13 php1 sshd\[21410\]: Failed password for invalid user elf from 46.101.72.145 port 52670 ssh2
Aug 15 00:25:14 php1 sshd\[21922\]: Invalid user lorene from 46.101.72.145
Aug 15 00:25:14 php1 sshd\[21922\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=kallealanen.fi
2019-08-15 18:42:03
80.82.78.57 attack
Several attempts to run phpmyadmin setup script
2019-08-15 17:45:52
106.13.78.56 attackbotsspam
Aug 15 01:38:26 josie sshd[30977]: Invalid user debian from 106.13.78.56
Aug 15 01:38:26 josie sshd[30977]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.78.56 
Aug 15 01:38:28 josie sshd[30977]: Failed password for invalid user debian from 106.13.78.56 port 35400 ssh2
Aug 15 01:38:29 josie sshd[30987]: Received disconnect from 106.13.78.56: 11: Bye Bye
Aug 15 02:02:09 josie sshd[13113]: Invalid user nasa123 from 106.13.78.56
Aug 15 02:02:09 josie sshd[13113]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.78.56 
Aug 15 02:02:12 josie sshd[13113]: Failed password for invalid user nasa123 from 106.13.78.56 port 50972 ssh2
Aug 15 02:02:12 josie sshd[13118]: Received disconnect from 106.13.78.56: 11: Bye Bye
Aug 15 02:05:31 josie sshd[14605]: Connection closed by 106.13.78.56
Aug 15 02:11:34 josie sshd[17654]: Connection closed by 106.13.78.56
Aug 15 02:12:28 josie sshd[18934]:........
-------------------------------
2019-08-15 17:25:37
118.25.98.75 attack
ssh failed login
2019-08-15 18:27:07
124.156.185.149 attackbots
Aug 15 06:29:51 mail sshd\[21969\]: Failed password for invalid user search from 124.156.185.149 port 32280 ssh2
Aug 15 06:49:33 mail sshd\[22540\]: Invalid user teamspeak from 124.156.185.149 port 12646
Aug 15 06:49:33 mail sshd\[22540\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=124.156.185.149
...
2019-08-15 17:29:03
103.90.224.155 attackbots
Sql/code injection probe
2019-08-15 17:26:24
75.117.194.100 attack
Aug 14 06:50:05 sanyalnet-awsem3-1 sshd[12193]: Connection from 75.117.194.100 port 52966 on 172.30.0.184 port 22
Aug 14 06:50:05 sanyalnet-awsem3-1 sshd[12193]: Invalid user postgres from 75.117.194.100
Aug 14 06:50:08 sanyalnet-awsem3-1 sshd[12193]: Failed password for invalid user postgres from 75.117.194.100 port 52966 ssh2
Aug 14 06:50:08 sanyalnet-awsem3-1 sshd[12193]: Received disconnect from 75.117.194.100: 11: Bye Bye [preauth]
Aug 14 07:00:22 sanyalnet-awsem3-1 sshd[13361]: Connection from 75.117.194.100 port 49694 on 172.30.0.184 port 22
Aug 14 07:00:22 sanyalnet-awsem3-1 sshd[13361]: Invalid user gp from 75.117.194.100


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=75.117.194.100
2019-08-15 17:56:36
111.231.112.36 attackbotsspam
Aug 15 02:32:27 xtremcommunity sshd\[25735\]: Invalid user ft from 111.231.112.36 port 56444
Aug 15 02:32:27 xtremcommunity sshd\[25735\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.231.112.36
Aug 15 02:32:30 xtremcommunity sshd\[25735\]: Failed password for invalid user ft from 111.231.112.36 port 56444 ssh2
Aug 15 02:39:15 xtremcommunity sshd\[26038\]: Invalid user developer from 111.231.112.36 port 46592
Aug 15 02:39:15 xtremcommunity sshd\[26038\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.231.112.36
...
2019-08-15 17:29:31
183.167.196.65 attack
Aug 15 05:44:03 root sshd[32703]: Failed password for root from 183.167.196.65 port 38156 ssh2
Aug 15 05:48:06 root sshd[590]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=183.167.196.65 
Aug 15 05:48:08 root sshd[590]: Failed password for invalid user vinay from 183.167.196.65 port 46308 ssh2
...
2019-08-15 17:24:09

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