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 <<>> 104.21.57.28
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 19666
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.57.28.			IN	A

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

;; Query time: 60 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 00:34:35 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 28.57.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 28.57.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
205.205.150.3 attackspam
Jan 16 16:06:28 h2177944 kernel: \[2385589.791432\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=205.205.150.3 DST=85.214.117.9 LEN=52 TOS=0x00 PREC=0x00 TTL=242 ID=49466 PROTO=TCP SPT=61188 DPT=27017 WINDOW=1024 RES=0x00 SYN URGP=0 
Jan 16 16:06:28 h2177944 kernel: \[2385589.791446\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=205.205.150.3 DST=85.214.117.9 LEN=52 TOS=0x00 PREC=0x00 TTL=242 ID=49466 PROTO=TCP SPT=61188 DPT=27017 WINDOW=1024 RES=0x00 SYN URGP=0 
Jan 16 16:08:22 h2177944 kernel: \[2385704.300604\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=205.205.150.3 DST=85.214.117.9 LEN=42 TOS=0x00 PREC=0x00 TTL=242 ID=58604 PROTO=UDP SPT=54600 DPT=27960 LEN=22 
Jan 16 16:08:22 h2177944 kernel: \[2385704.300615\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=205.205.150.3 DST=85.214.117.9 LEN=42 TOS=0x00 PREC=0x00 TTL=242 ID=58604 PROTO=UDP SPT=54600 DPT=27960 LEN=22 
Jan 16 16:09:40 h2177944 kernel: \[2385782.035446\] \[UFW BLOCK\] IN=venet0 OUT= MAC= SRC=205.205.150.3 DST=85.214.117.9 LEN=52 TOS=0x00 PREC=0x00 TTL=242 ID=65160 PR
2020-01-16 23:32:56
14.249.90.64 attack
Jan 16 14:02:51 andromeda sshd\[11794\]: Invalid user guest from 14.249.90.64 port 50088
Jan 16 14:02:51 andromeda sshd\[11794\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.249.90.64
Jan 16 14:02:53 andromeda sshd\[11794\]: Failed password for invalid user guest from 14.249.90.64 port 50088 ssh2
2020-01-16 23:12:36
111.231.132.94 attack
$f2bV_matches
2020-01-16 22:50:00
36.81.69.46 attackbotsspam
1Blacklist
2020-01-16 23:25:51
79.143.44.122 attackspam
Jan 16 13:28:23 vtv3 sshd[12643]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=79.143.44.122 
Jan 16 13:28:26 vtv3 sshd[12643]: Failed password for invalid user jenkins from 79.143.44.122 port 33886 ssh2
Jan 16 13:30:32 vtv3 sshd[13495]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=79.143.44.122 
Jan 16 13:41:59 vtv3 sshd[19235]: Failed password for root from 79.143.44.122 port 59717 ssh2
Jan 16 13:45:36 vtv3 sshd[21102]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=79.143.44.122 
Jan 16 13:45:38 vtv3 sshd[21102]: Failed password for invalid user oracle from 79.143.44.122 port 42253 ssh2
Jan 16 13:57:39 vtv3 sshd[27148]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=79.143.44.122 
Jan 16 13:57:41 vtv3 sshd[27148]: Failed password for invalid user nexus from 79.143.44.122 port 39057 ssh2
Jan 16 13:59:46 vtv3 sshd[27968]: pam_unix(sshd:auth):
2020-01-16 23:19:45
77.42.89.90 attack
Automatic report - Port Scan Attack
2020-01-16 23:23:08
157.230.156.51 attack
Unauthorized connection attempt detected from IP address 157.230.156.51 to port 2220 [J]
2020-01-16 23:22:04
49.88.112.63 attack
Jan 16 16:12:58 nextcloud sshd\[5306\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.63  user=root
Jan 16 16:13:00 nextcloud sshd\[5306\]: Failed password for root from 49.88.112.63 port 47092 ssh2
Jan 16 16:13:05 nextcloud sshd\[5306\]: Failed password for root from 49.88.112.63 port 47092 ssh2
...
2020-01-16 23:16:19
51.75.52.127 attackspam
Unauthorized connection attempt detected from IP address 51.75.52.127 to port 2064 [J]
2020-01-16 23:08:47
37.239.217.86 attackspambots
SSH/22 MH Probe, BF, Hack -
2020-01-16 23:30:19
218.27.162.22 attackspambots
failed_logins
2020-01-16 23:04:49
197.210.84.6 attackspam
Lines containing failures of 197.210.84.6
Jan 16 13:52:42 shared01 sshd[9088]: Invalid user monhostnameor from 197.210.84.6 port 50891
Jan 16 13:52:42 shared01 sshd[9088]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=197.210.84.6
Jan 16 13:52:44 shared01 sshd[9088]: Failed password for invalid user monhostnameor from 197.210.84.6 port 50891 ssh2
Jan 16 13:52:44 shared01 sshd[9088]: Connection closed by invalid user monhostnameor 197.210.84.6 port 50891 [preauth]


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=197.210.84.6
2020-01-16 23:02:43
185.175.93.105 attackbotsspam
Jan 16 15:37:08 debian-2gb-nbg1-2 kernel: \[1444723.888185\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=185.175.93.105 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=23135 PROTO=TCP SPT=57879 DPT=63402 WINDOW=1024 RES=0x00 SYN URGP=0
2020-01-16 22:58:22
95.216.41.20 attack
Email address rejected
2020-01-16 23:02:23
193.112.74.137 attackbotsspam
Jan 16 16:15:45 meumeu sshd[3763]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=193.112.74.137 
Jan 16 16:15:46 meumeu sshd[3763]: Failed password for invalid user frappe from 193.112.74.137 port 42466 ssh2
Jan 16 16:18:51 meumeu sshd[4276]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=193.112.74.137 
...
2020-01-16 23:23:28

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