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 <<>> 104.21.81.91
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 42062
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;104.21.81.91.			IN	A

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

;; Query time: 57 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Fri Feb 18 03:03:08 CST 2022
;; MSG SIZE  rcvd: 105
Host info
Host 91.81.21.104.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		183.60.83.19
Address:	183.60.83.19#53

** server can't find 91.81.21.104.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
51.75.30.238 attackbots
Sep 18 21:07:15 web1 sshd[447]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.75.30.238  user=root
Sep 18 21:07:17 web1 sshd[447]: Failed password for root from 51.75.30.238 port 46780 ssh2
Sep 18 21:15:55 web1 sshd[3384]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.75.30.238  user=root
Sep 18 21:15:56 web1 sshd[3384]: Failed password for root from 51.75.30.238 port 43338 ssh2
Sep 18 21:20:06 web1 sshd[4781]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.75.30.238  user=root
Sep 18 21:20:08 web1 sshd[4781]: Failed password for root from 51.75.30.238 port 55528 ssh2
Sep 18 21:24:10 web1 sshd[6055]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.75.30.238  user=root
Sep 18 21:24:12 web1 sshd[6055]: Failed password for root from 51.75.30.238 port 39484 ssh2
Sep 18 21:28:02 web1 sshd[7329]: Invalid user ubnt fro
...
2020-09-18 20:57:51
178.93.185.198 attackspam
Unauthorized connection attempt from IP address 178.93.185.198 on Port 445(SMB)
2020-09-18 21:09:14
185.68.78.78 attackbotsspam
Sep 17 19:01:37 h2829583 sshd[15031]: Failed password for root from 185.68.78.78 port 5848 ssh2
2020-09-18 20:55:32
95.71.205.183 attackbotsspam
Brute-force attempt banned
2020-09-18 20:59:06
85.229.186.252 attack
Brute-force attempt banned
2020-09-18 21:11:13
222.186.173.215 attack
Sep 18 15:20:25 MainVPS sshd[29335]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.173.215  user=root
Sep 18 15:20:27 MainVPS sshd[29335]: Failed password for root from 222.186.173.215 port 57458 ssh2
Sep 18 15:20:31 MainVPS sshd[29335]: Failed password for root from 222.186.173.215 port 57458 ssh2
Sep 18 15:20:25 MainVPS sshd[29335]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.173.215  user=root
Sep 18 15:20:27 MainVPS sshd[29335]: Failed password for root from 222.186.173.215 port 57458 ssh2
Sep 18 15:20:31 MainVPS sshd[29335]: Failed password for root from 222.186.173.215 port 57458 ssh2
Sep 18 15:20:25 MainVPS sshd[29335]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.173.215  user=root
Sep 18 15:20:27 MainVPS sshd[29335]: Failed password for root from 222.186.173.215 port 57458 ssh2
Sep 18 15:20:31 MainVPS sshd[29335]: Failed password for root from 222.18
2020-09-18 21:28:15
88.247.145.142 attack
Unauthorized connection attempt from IP address 88.247.145.142 on Port 445(SMB)
2020-09-18 21:18:29
104.248.122.143 attackspambots
Sep 18 14:55:34 sip sshd[1644402]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=104.248.122.143  user=root
Sep 18 14:55:37 sip sshd[1644402]: Failed password for root from 104.248.122.143 port 39224 ssh2
Sep 18 14:59:28 sip sshd[1644428]: Invalid user oracle from 104.248.122.143 port 50508
...
2020-09-18 21:06:55
167.172.195.99 attack
Sep 18 14:26:19 fhem-rasp sshd[8098]: Failed password for root from 167.172.195.99 port 57414 ssh2
Sep 18 14:26:19 fhem-rasp sshd[8098]: Disconnected from authenticating user root 167.172.195.99 port 57414 [preauth]
...
2020-09-18 21:14:07
179.209.88.230 attack
Sep 18 11:44:12 nas sshd[16995]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=179.209.88.230 
Sep 18 11:44:14 nas sshd[16995]: Failed password for invalid user cagsshpure1991 from 179.209.88.230 port 47813 ssh2
Sep 18 11:52:07 nas sshd[17414]: Failed password for root from 179.209.88.230 port 53119 ssh2
...
2020-09-18 21:29:15
31.208.205.48 attackspambots
2020-09-17T21:01:11.055766Z 0e09169a9fcd New connection: 31.208.205.48:34768 (172.17.0.2:2222) [session: 0e09169a9fcd]
2020-09-17T21:01:14.665749Z b208d2b030a0 New connection: 31.208.205.48:34858 (172.17.0.2:2222) [session: b208d2b030a0]
2020-09-18 21:17:01
111.229.194.130 attack
web-1 [ssh] SSH Attack
2020-09-18 21:27:55
149.202.40.210 attack
149.202.40.210 (FR/France/-), 7 distributed sshd attacks on account [root] in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_DISTATTACK; Logs: Sep 18 07:50:10 server5 sshd[25629]: Failed password for root from 149.202.40.210 port 35256 ssh2
Sep 18 07:48:22 server5 sshd[24567]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=196.216.228.111  user=root
Sep 18 07:48:24 server5 sshd[24567]: Failed password for root from 196.216.228.111 port 48644 ssh2
Sep 18 07:48:25 server5 sshd[24575]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.53.2.93  user=root
Sep 18 07:48:26 server5 sshd[24575]: Failed password for root from 106.53.2.93 port 39510 ssh2
Sep 18 07:48:54 server5 sshd[24919]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=60.29.31.98  user=root
Sep 18 07:48:55 server5 sshd[24919]: Failed password for root from 60.29.31.98 port 35884 ssh2

IP Addresses Blocked:
2020-09-18 20:59:56
191.233.137.218 attackbotsspam
Sep 18 13:49:40 raspberrypi sshd[19940]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=191.233.137.218  user=root
Sep 18 13:49:42 raspberrypi sshd[19940]: Failed password for invalid user root from 191.233.137.218 port 34192 ssh2
...
2020-09-18 21:20:44
128.199.214.208 attackspambots
2020-09-18T01:11:55.065050mail.broermann.family sshd[14082]: Failed password for invalid user helene from 128.199.214.208 port 55704 ssh2
2020-09-18T01:17:22.119016mail.broermann.family sshd[14271]: Invalid user yhchang from 128.199.214.208 port 34198
2020-09-18T01:17:22.123052mail.broermann.family sshd[14271]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=128.199.214.208
2020-09-18T01:17:22.119016mail.broermann.family sshd[14271]: Invalid user yhchang from 128.199.214.208 port 34198
2020-09-18T01:17:24.433708mail.broermann.family sshd[14271]: Failed password for invalid user yhchang from 128.199.214.208 port 34198 ssh2
...
2020-09-18 21:30:07

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