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: Spain

Internet Service Provider: Universidad Politecnica de Madrid

Hostname: unknown

Organization: unknown

Usage Type: University/College/School

Comments:
Type Details Datetime
attackspambots
Aug 12 23:15:31 svapp01 sshd[4531]: Failed password for invalid user marc from 138.100.74.230 port 34726 ssh2
Aug 12 23:15:31 svapp01 sshd[4531]: Received disconnect from 138.100.74.230: 11: Bye Bye [preauth]
Aug 12 23:51:08 svapp01 sshd[19395]: User r.r from 138.100.74.230 not allowed because not listed in AllowUsers
Aug 12 23:51:08 svapp01 sshd[19395]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=138.100.74.230  user=r.r


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=138.100.74.230
2019-08-13 07:32:01
Comments on same subnet:
No discussion about this subnet yet..
Whois info:
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Dig info:
; <<>> DiG 9.10.3-P4-Ubuntu <<>> 138.100.74.230
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 561
;; flags: qr rd ra ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;138.100.74.230.			IN	A

;; AUTHORITY SECTION:
.			3600	IN	SOA	a.root-servers.net. nstld.verisign-grs.com. 2019081201 1800 900 604800 86400

;; Query time: 2 msec
;; SERVER: 67.207.67.2#53(67.207.67.2)
;; WHEN: Tue Aug 13 07:31:56 CST 2019
;; MSG SIZE  rcvd: 118
Host info
Host 230.74.100.138.in-addr.arpa. not found: 3(NXDOMAIN)
Nslookup info:
Server:		67.207.67.2
Address:	67.207.67.2#53

** server can't find 230.74.100.138.in-addr.arpa: NXDOMAIN
Related IP info:
Related comments:
IP Type Details Datetime
105.103.55.196 attackbotsspam
Port Scan: TCP/443
2020-10-11 13:08:29
166.168.3.163 attackbotsspam
Port Scan: TCP/443
2020-10-11 13:00:38
118.24.234.79 attackbotsspam
...
2020-10-11 12:48:55
188.75.132.210 attack
Brute force attempt
2020-10-11 13:06:13
103.253.42.54 attack
Oct 11 05:34:29 mail postfix/smtpd\[4382\]: warning: unknown\[103.253.42.54\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 11 05:43:42 mail postfix/smtpd\[4743\]: warning: unknown\[103.253.42.54\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 11 06:19:19 mail postfix/smtpd\[5718\]: warning: unknown\[103.253.42.54\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Oct 11 06:28:23 mail postfix/smtpd\[6058\]: warning: unknown\[103.253.42.54\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
2020-10-11 12:40:42
64.202.189.187 attack
HTTP wp-login.php - winhostecn39.prod.mesa1.secureserver.net
2020-10-11 13:01:51
77.123.155.144 attackspam
2020-10-11T02:56:59.118739abusebot-3.cloudsearch.cf sshd[13669]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=77.123.155.144  user=root
2020-10-11T02:57:01.014140abusebot-3.cloudsearch.cf sshd[13669]: Failed password for root from 77.123.155.144 port 59608 ssh2
2020-10-11T03:00:34.676372abusebot-3.cloudsearch.cf sshd[13682]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=77.123.155.144  user=root
2020-10-11T03:00:36.756970abusebot-3.cloudsearch.cf sshd[13682]: Failed password for root from 77.123.155.144 port 37392 ssh2
2020-10-11T03:04:05.919659abusebot-3.cloudsearch.cf sshd[13706]: Invalid user vita from 77.123.155.144 port 43430
2020-10-11T03:04:05.925791abusebot-3.cloudsearch.cf sshd[13706]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=77.123.155.144
2020-10-11T03:04:05.919659abusebot-3.cloudsearch.cf sshd[13706]: Invalid user vita from 77.123.155.144 port 
...
2020-10-11 12:37:52
106.75.169.106 attackspam
Oct 10 18:14:37 web9 sshd\[7815\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.75.169.106  user=root
Oct 10 18:14:39 web9 sshd\[7815\]: Failed password for root from 106.75.169.106 port 58562 ssh2
Oct 10 18:19:06 web9 sshd\[8461\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.75.169.106  user=root
Oct 10 18:19:08 web9 sshd\[8461\]: Failed password for root from 106.75.169.106 port 51250 ssh2
Oct 10 18:23:43 web9 sshd\[9150\]: Invalid user tokend from 106.75.169.106
2020-10-11 12:56:30
87.15.233.75 attackspambots
[SYS1] ANY - Unused Port - Port=80 (1x)
2020-10-11 12:37:22
109.227.63.3 attackspam
(sshd) Failed SSH login from 109.227.63.3 (HR/Croatia/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SSHD; Logs: Oct 10 23:07:21 server4 sshd[20408]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=109.227.63.3  user=root
Oct 10 23:07:23 server4 sshd[20408]: Failed password for root from 109.227.63.3 port 34663 ssh2
Oct 10 23:11:08 server4 sshd[22467]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=109.227.63.3  user=root
Oct 10 23:11:10 server4 sshd[22467]: Failed password for root from 109.227.63.3 port 36746 ssh2
Oct 10 23:15:00 server4 sshd[24717]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=109.227.63.3  user=root
2020-10-11 12:39:58
81.70.93.61 attackspambots
Oct  5 19:02:25 roki-contabo sshd\[1609\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=81.70.93.61  user=root
Oct  5 19:02:26 roki-contabo sshd\[1609\]: Failed password for root from 81.70.93.61 port 38402 ssh2
Oct  5 19:10:28 roki-contabo sshd\[2082\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=81.70.93.61  user=root
Oct  5 19:10:30 roki-contabo sshd\[2082\]: Failed password for root from 81.70.93.61 port 35888 ssh2
Oct  5 19:13:19 roki-contabo sshd\[2166\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=81.70.93.61  user=root
...
2020-10-11 13:10:18
112.85.42.190 attackspambots
$f2bV_matches
2020-10-11 12:46:49
174.243.97.222 attack
Brute forcing email accounts
2020-10-11 12:58:42
91.241.19.173 attackspam
Oct 10 22:25:30  kernel: [30164.517416] IN=enp34s0 OUT= MAC=SERVERMAC SRC=91.241.19.173 DST=MYSERVERIP LEN=48 TOS=0x00 PREC=0x00 TTL=122 ID=1919 DF PROTO=TCP SPT=63403 DPT=3389 WINDOW=200 RES=0x00 SYN URGP=0  Ports: 3389
2020-10-11 12:55:05
142.93.191.61 attackspambots
Unauthorized connection attempt detected from IP address 142.93.191.61 to port 8088 [T]
2020-10-11 12:43:30

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