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 <<>> 104.21.52.21
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 7000
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.52.21.			IN	A

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

;; Query time: 20 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Thu Feb 17 23:49:06 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 21.52.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 21.52.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
83.14.199.49 attackspambots
Apr 28 15:26:33 scw-6657dc sshd[2108]: Failed password for root from 83.14.199.49 port 40354 ssh2
Apr 28 15:26:33 scw-6657dc sshd[2108]: Failed password for root from 83.14.199.49 port 40354 ssh2
Apr 28 15:30:00 scw-6657dc sshd[2224]: Invalid user user1 from 83.14.199.49 port 34152
...
2020-04-29 00:13:31
198.199.114.226 attackspam
198.199.114.226 - - \[28/Apr/2020:17:52:00 +0200\] "POST /wp-login.php HTTP/1.0" 200 7005 "-" "Mozilla/5.0 \(X11\; Ubuntu\; Linux x86_64\; rv:62.0\) Gecko/20100101 Firefox/62.0"
198.199.114.226 - - \[28/Apr/2020:17:52:03 +0200\] "POST /wp-login.php HTTP/1.0" 200 6819 "-" "Mozilla/5.0 \(X11\; Ubuntu\; Linux x86_64\; rv:62.0\) Gecko/20100101 Firefox/62.0"
198.199.114.226 - - \[28/Apr/2020:17:52:05 +0200\] "POST /wp-login.php HTTP/1.0" 200 6828 "-" "Mozilla/5.0 \(X11\; Ubuntu\; Linux x86_64\; rv:62.0\) Gecko/20100101 Firefox/62.0"
2020-04-29 00:29:39
123.240.57.227 attack
Honeypot attack, port: 81, PTR: 123-240-57-227.cctv.dynamic.tbcnet.net.tw.
2020-04-29 00:32:00
106.53.20.166 attackspambots
Apr 28 14:21:13  sshd\[25622\]: Invalid user vagrant from 106.53.20.166Apr 28 14:21:15  sshd\[25622\]: Failed password for invalid user vagrant from 106.53.20.166 port 47588 ssh2
...
2020-04-29 00:45:19
60.2.224.234 attack
2020-04-28T07:42:41.6568191495-001 sshd[4537]: Invalid user ftptest from 60.2.224.234 port 37074
2020-04-28T07:42:43.6662531495-001 sshd[4537]: Failed password for invalid user ftptest from 60.2.224.234 port 37074 ssh2
2020-04-28T07:50:14.0688771495-001 sshd[5042]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=60.2.224.234  user=root
2020-04-28T07:50:16.2673721495-001 sshd[5042]: Failed password for root from 60.2.224.234 port 47506 ssh2
2020-04-28T07:54:10.9568401495-001 sshd[5281]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=60.2.224.234  user=root
2020-04-28T07:54:12.8853461495-001 sshd[5281]: Failed password for root from 60.2.224.234 port 38606 ssh2
...
2020-04-29 00:55:55
117.1.168.37 attackspam
Honeypot attack, port: 445, PTR: localhost.
2020-04-29 00:43:16
105.212.4.6 attackspambots
1588075898 - 04/28/2020 14:11:38 Host: 105.212.4.6/105.212.4.6 Port: 445 TCP Blocked
2020-04-29 00:07:28
14.207.58.141 attackbotsspam
Honeypot attack, port: 445, PTR: mx-ll-14.207.58-141.dynamic.3bb.in.th.
2020-04-29 00:29:59
185.232.65.216 attackbotsspam
[Tue Apr 28 19:11:34.814444 2020] [:error] [pid 15134:tid 140575009466112] [client 185.232.65.216:62642] [client 185.232.65.216] ModSecurity: Access denied with code 403 (phase 1). Match of "within %{tx.allowed_http_versions}" against "REQUEST_PROTOCOL" required. [file "/etc/modsecurity/owasp-modsecurity-crs-3.2.0/rules/REQUEST-920-PROTOCOL-ENFORCEMENT.conf"] [line "972"] [id "920430"] [msg "HTTP protocol version is not allowed by policy"] [data "HTTP/1.0"] [severity "CRITICAL"] [ver "OWASP_CRS/3.2.0"] [tag "application-multi"] [tag "language-multi"] [tag "platform-multi"] [tag "attack-protocol"] [tag "OWASP_CRS"] [tag "OWASP_CRS/POLICY/PROTOCOL_NOT_ALLOWED"] [tag "WASCTC/WASC-21"] [tag "OWASP_TOP_10/A6"] [tag "PCI/6.5.10"] [hostname "karangploso.jatim.bmkg.go.id"] [uri "/"] [unique_id "XqgddkYCcGInluRmZWCZWgAAATs"]
...
2020-04-29 00:15:39
185.232.65.196 attackspambots
[Tue Apr 28 19:11:32.524543 2020] [:error] [pid 15134:tid 140575009466112] [client 185.232.65.196:52527] [client 185.232.65.196] ModSecurity: Access denied with code 403 (phase 2). Pattern match "^[\\\\d.:]+$" at REQUEST_HEADERS:Host. [file "/etc/modsecurity/owasp-modsecurity-crs-3.2.0/rules/REQUEST-920-PROTOCOL-ENFORCEMENT.conf"] [line "696"] [id "920350"] [msg "Host header is a numeric IP address"] [data "103.27.207.197"] [severity "WARNING"] [ver "OWASP_CRS/3.2.0"] [tag "application-multi"] [tag "language-multi"] [tag "platform-multi"] [tag "attack-protocol"] [tag "OWASP_CRS"] [tag "OWASP_CRS/PROTOCOL_VIOLATION/IP_HOST"] [tag "WASCTC/WASC-21"] [tag "OWASP_TOP_10/A7"] [tag "PCI/6.5.10"] [hostname "103.27.207.197"] [uri "/"] [unique_id "XqgddEYCcGInluRmZWCZWAAAATs"]
...
2020-04-29 00:16:31
172.104.242.173 attackbotsspam
Apr 28 17:15:54 debian-2gb-nbg1-2 kernel: \[10345880.206425\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=172.104.242.173 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=15018 PROTO=TCP SPT=48165 DPT=3389 WINDOW=1024 RES=0x00 SYN URGP=0
2020-04-29 00:12:28
116.58.226.244 attackbots
Apr 28 14:11:38 pve1 sshd[2595]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=116.58.226.244 
Apr 28 14:11:40 pve1 sshd[2595]: Failed password for invalid user admin from 116.58.226.244 port 33752 ssh2
...
2020-04-29 00:10:59
219.91.207.210 attackspam
1588075833 - 04/28/2020 14:10:33 Host: 219.91.207.210/219.91.207.210 Port: 445 TCP Blocked
2020-04-29 00:58:16
201.22.74.99 attack
Apr 28 13:11:12 l03 sshd[1102]: Invalid user noc from 201.22.74.99 port 36792
...
2020-04-29 00:32:20
103.207.38.237 attackbots
TCP src-port=54958   dst-port=25   Listed on   dnsbl-sorbs barracuda spamcop       (Project Honey Pot rated Suspicious)   (266)
2020-04-29 00:25:32

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