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: China

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:
IP Type Details Datetime
42.51.42.99 attack
Automatic report - Banned IP Access
2020-09-01 20:43:36
42.51.40.73 attack
Aug  9 06:03:23 UTC__SANYALnet-Labs__cac14 sshd[12608]: Connection from 42.51.40.73 port 34918 on 64.137.176.112 port 22
Aug  9 06:03:27 UTC__SANYALnet-Labs__cac14 sshd[12608]: Address 42.51.40.73 maps to idc.ly.ha, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
Aug  9 06:03:27 UTC__SANYALnet-Labs__cac14 sshd[12608]: User r.r from 42.51.40.73 not allowed because not listed in AllowUsers
Aug  9 06:03:27 UTC__SANYALnet-Labs__cac14 sshd[12608]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.51.40.73  user=r.r
Aug  9 06:03:29 UTC__SANYALnet-Labs__cac14 sshd[12608]: Failed password for invalid user r.r from 42.51.40.73 port 34918 ssh2
Aug  9 06:03:29 UTC__SANYALnet-Labs__cac14 sshd[12608]: Received disconnect from 42.51.40.73: 11: Bye Bye [preauth]
Aug  9 06:06:16 UTC__SANYALnet-Labs__cac14 sshd[12670]: Connection from 42.51.40.73 port 56588 on 64.137.176.112 port 22
Aug  9 06:06:18 UTC__SANYALnet-Labs__cac1........
-------------------------------
2020-08-10 07:22:53
42.51.42.99 attackbotsspam
Web-based SQL injection attempt
2020-04-26 17:41:20
42.51.42.47 attackspam
2020-03-03T05:08:50.574498shield sshd\[9555\]: Invalid user mcserver from 42.51.42.47 port 42213
2020-03-03T05:08:50.580021shield sshd\[9555\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.51.42.47
2020-03-03T05:08:52.411255shield sshd\[9555\]: Failed password for invalid user mcserver from 42.51.42.47 port 42213 ssh2
2020-03-03T05:09:29.353193shield sshd\[9638\]: Invalid user fmnet from 42.51.42.47 port 44055
2020-03-03T05:09:29.358086shield sshd\[9638\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.51.42.47
2020-03-03 14:00:08
42.51.45.97 attackspambots
Feb  6 05:52:07 hpm sshd\[12173\]: Invalid user kdu from 42.51.45.97
Feb  6 05:52:07 hpm sshd\[12173\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.51.45.97
Feb  6 05:52:09 hpm sshd\[12173\]: Failed password for invalid user kdu from 42.51.45.97 port 55239 ssh2
Feb  6 05:55:33 hpm sshd\[12556\]: Invalid user ek from 42.51.45.97
Feb  6 05:55:33 hpm sshd\[12556\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.51.45.97
2020-02-07 01:11:24
42.51.42.47 attack
2020-01-25T04:46:18.026030abusebot-3.cloudsearch.cf sshd[20525]: Invalid user helle from 42.51.42.47 port 57552
2020-01-25T04:46:18.032039abusebot-3.cloudsearch.cf sshd[20525]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.51.42.47
2020-01-25T04:46:18.026030abusebot-3.cloudsearch.cf sshd[20525]: Invalid user helle from 42.51.42.47 port 57552
2020-01-25T04:46:20.415903abusebot-3.cloudsearch.cf sshd[20525]: Failed password for invalid user helle from 42.51.42.47 port 57552 ssh2
2020-01-25T04:53:38.026999abusebot-3.cloudsearch.cf sshd[20986]: Invalid user user1 from 42.51.42.47 port 49285
2020-01-25T04:53:38.033776abusebot-3.cloudsearch.cf sshd[20986]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.51.42.47
2020-01-25T04:53:38.026999abusebot-3.cloudsearch.cf sshd[20986]: Invalid user user1 from 42.51.42.47 port 49285
2020-01-25T04:53:39.820530abusebot-3.cloudsearch.cf sshd[20986]: Failed password for 
...
2020-01-25 15:36:36
42.51.44.211 attackspam
Host Scan
2019-12-05 19:59:28
42.51.42.109 attackspam
Nov 12 09:05:45 ns382633 sshd\[28794\]: Invalid user blocker from 42.51.42.109 port 52293
Nov 12 09:05:45 ns382633 sshd\[28794\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.51.42.109
Nov 12 09:05:47 ns382633 sshd\[28794\]: Failed password for invalid user blocker from 42.51.42.109 port 52293 ssh2
Nov 12 09:22:34 ns382633 sshd\[31868\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.51.42.109  user=root
Nov 12 09:22:36 ns382633 sshd\[31868\]: Failed password for root from 42.51.42.109 port 39216 ssh2
2019-11-12 18:40:37
42.51.42.109 attack
SSH/22 MH Probe, BF, Hack -
2019-11-07 03:27:11
42.51.43.15 attackspam
Wordpress XMLRPC attack
2019-09-13 21:12:33
42.51.43.15 attackspam
Bot ignores robot.txt restrictions
2019-07-12 09:02:02
42.51.42.99 attackspam
SS5,WP GET /wp-login.php
2019-07-12 08:48:00
42.51.43.15 attackspambots
[09/Jul/2019:15:27:36 +0200] Web-Request: "GET /wp-login.php", User-Agent: "Apache-HttpClient/4.5.2 (Java/1.8.0_151)"
[09/Jul/2019:15:27:37 +0200] Web-Request: "GET /wp-login.php", User-Agent: "Apache-HttpClient/4.5.2 (Java/1.8.0_151)"
2019-07-10 05:08:35
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 42.51.4.6
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 9706
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;42.51.4.6.			IN	A

;; AUTHORITY SECTION:
.			30	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2025021900 1800 900 604800 86400

;; Query time: 60 msec
;; SERVER: 183.60.83.19#53(183.60.83.19)
;; WHEN: Wed Feb 19 21:31:21 CST 2025
;; MSG SIZE  rcvd: 102
Host info
Host 6.4.51.42.in-addr.arpa not found: 2(SERVFAIL)
Nslookup info:
server can't find 42.51.4.6.in-addr.arpa: SERVFAIL
Related IP info:
Related comments:
IP Type Details Datetime
178.128.162.10 attackbots
Jan  1 00:18:59 legacy sshd[2349]: Failed password for root from 178.128.162.10 port 35016 ssh2
Jan  1 00:21:48 legacy sshd[2509]: Failed password for root from 178.128.162.10 port 34632 ssh2
Jan  1 00:24:22 legacy sshd[2638]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.128.162.10
...
2020-01-01 07:34:40
218.92.0.210 attackspam
Unauthorized connection attempt detected from IP address 218.92.0.210 to port 22
2020-01-01 07:24:20
222.186.52.78 attackspam
Jan  1 00:09:21 v22018053744266470 sshd[12964]: Failed password for root from 222.186.52.78 port 13877 ssh2
Jan  1 00:11:13 v22018053744266470 sshd[13077]: Failed password for root from 222.186.52.78 port 46063 ssh2
...
2020-01-01 07:27:50
131.221.97.70 attackbots
Jan  1 00:26:13 mout sshd[28649]: Invalid user web from 131.221.97.70 port 49940
2020-01-01 07:29:26
49.88.112.110 attack
19/12/31@18:12:23: FAIL: Alarm-SSH address from=49.88.112.110
...
2020-01-01 07:21:11
222.186.31.127 attackbotsspam
Jan  1 00:12:57 localhost sshd\[8937\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.31.127  user=root
Jan  1 00:12:59 localhost sshd\[8937\]: Failed password for root from 222.186.31.127 port 52064 ssh2
Jan  1 00:13:01 localhost sshd\[8937\]: Failed password for root from 222.186.31.127 port 52064 ssh2
2020-01-01 07:30:59
92.249.127.156 attackbotsspam
1577832769 - 12/31/2019 23:52:49 Host: 92.249.127.156/92.249.127.156 Port: 445 TCP Blocked
2020-01-01 07:26:49
37.49.231.107 attackspambots
firewall-block, port(s): 5060/udp
2020-01-01 07:17:07
37.187.127.13 attackspam
Dec 31 14:24:57 server sshd\[12921\]: Invalid user dlund from 37.187.127.13
Dec 31 14:24:57 server sshd\[12921\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=ns333909.ip-37-187-127.eu 
Dec 31 14:24:59 server sshd\[12921\]: Failed password for invalid user dlund from 37.187.127.13 port 46100 ssh2
Jan  1 02:41:07 server sshd\[14093\]: Invalid user backup from 37.187.127.13
Jan  1 02:41:07 server sshd\[14093\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=ns333909.ip-37-187-127.eu 
...
2020-01-01 07:44:35
51.38.80.173 attackspam
Jan  1 00:37:36 localhost sshd\[12088\]: Invalid user japan from 51.38.80.173 port 53098
Jan  1 00:37:36 localhost sshd\[12088\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.80.173
Jan  1 00:37:37 localhost sshd\[12088\]: Failed password for invalid user japan from 51.38.80.173 port 53098 ssh2
2020-01-01 07:38:26
189.212.120.129 attackbots
Automatic report - Port Scan Attack
2020-01-01 07:42:56
111.38.26.165 attackbots
Telnet Server BruteForce Attack
2020-01-01 07:15:29
112.85.42.185 attackbots
SSH Login Bruteforce
2020-01-01 07:41:18
185.79.115.147 attack
IP blocked
2020-01-01 07:45:42
140.86.12.31 attackbots
Dec 31 23:11:11 localhost sshd\[10657\]: Invalid user webmaster from 140.86.12.31 port 62873
Dec 31 23:11:11 localhost sshd\[10657\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=140.86.12.31
Dec 31 23:11:12 localhost sshd\[10657\]: Failed password for invalid user webmaster from 140.86.12.31 port 62873 ssh2
Dec 31 23:14:44 localhost sshd\[10786\]: Invalid user installert from 140.86.12.31 port 22954
Dec 31 23:14:44 localhost sshd\[10786\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=140.86.12.31
...
2020-01-01 07:20:08

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