The IP has triggered Cloudflare WAF. CF-Ray: 5434264e3af2e7bd | WAF_Rule_ID: 1112824 | WAF_Kind: firewall | CF_Action: challenge | Country: CN | CF_IPClass: noRecord | Protocol: HTTP/1.1 | Method: GET | Host: clash.skk.moe | User-Agent: Mozilla/5.0 (Linux; U; Android 4.3; en-us; SM-N900T Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 | CF_DC: LAX. Report generated by Cloudflare-WAF-to-AbuseIPDB (https://github.com/SukkaW/Cloudflare-WAF-to-AbuseIPDB).

Jun 27 02:26:06 our-server-hostname sshd[15653]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.237.224.16  user=r.r
Jun 27 02:26:08 our-server-hostname sshd[15653]: Failed password for r.r from 121.237.224.16 port 52560 ssh2
Jun 27 02:43:53 our-server-hostname sshd[18514]: Invalid user marketing from 121.237.224.16
Jun 27 02:43:53 our-server-hostname sshd[18514]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.237.224.16 
Jun 27 02:43:56 our-server-hostname sshd[18514]: Failed password for invalid user marketing from 121.237.224.16 port 54334 ssh2
Jun 27 02:45:21 our-server-hostname sshd[18765]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.237.224.16  user=r.r
Jun 27 02:45:22 our-server-hostname sshd[18765]: Failed password for r.r from 121.237.224.16 port 40974 ssh2


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=121.237.2

Jun 27 01:38:44 master sshd[11049]: Failed password for invalid user login from 121.237.224.16 port 43030 ssh2
Jun 27 01:58:47 master sshd[11212]: Failed password for root from 121.237.224.16 port 47692 ssh2
Jun 27 01:59:58 master sshd[11216]: Failed password for invalid user ftpuser from 121.237.224.16 port 36132 ssh2
Jun 27 02:01:05 master sshd[11630]: Failed password for invalid user delta from 121.237.224.16 port 52800 ssh2
Jun 27 02:02:07 master sshd[11632]: Failed password for invalid user y from 121.237.224.16 port 41222 ssh2
Jun 27 02:03:16 master sshd[11634]: Failed password for invalid user i686 from 121.237.224.16 port 57886 ssh2
Jun 27 02:04:19 master sshd[11636]: Failed password for invalid user fuzihao from 121.237.224.16 port 46314 ssh2
Jun 27 02:05:25 master sshd[11640]: Failed password for invalid user moto from 121.237.224.16 port 34744 ssh2
Jun 27 02:06:31 master sshd[11642]: Failed password for invalid user wyq from 121.237.224.16 port 51398 ssh2

Jun  1 06:47:25 journals sshd\[111240\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.237.250.31  user=root
Jun  1 06:47:27 journals sshd\[111240\]: Failed password for root from 121.237.250.31 port 42300 ssh2
Jun  1 06:51:26 journals sshd\[111673\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.237.250.31  user=root
Jun  1 06:51:28 journals sshd\[111673\]: Failed password for root from 121.237.250.31 port 38758 ssh2
Jun  1 06:55:18 journals sshd\[112038\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.237.250.31  user=root
...

May 30 16:04:53 NPSTNNYC01T sshd[18826]: Failed password for root from 121.237.250.31 port 57738 ssh2
May 30 16:08:25 NPSTNNYC01T sshd[19162]: Failed password for root from 121.237.250.31 port 53888 ssh2
...

May 28 19:52:42 zimbra sshd[3732]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.237.250.31  user=r.r
May 28 19:52:44 zimbra sshd[3732]: Failed password for r.r from 121.237.250.31 port 54854 ssh2
May 28 19:52:44 zimbra sshd[3732]: Received disconnect from 121.237.250.31 port 54854:11: Bye Bye [preauth]
May 28 19:52:44 zimbra sshd[3732]: Disconnected from 121.237.250.31 port 54854 [preauth]
May 28 20:11:13 zimbra sshd[18639]: Invalid user edwin from 121.237.250.31
May 28 20:11:13 zimbra sshd[18639]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.237.250.31
May 28 20:11:15 zimbra sshd[18639]: Failed password for invalid user edwin from 121.237.250.31 port 45684 ssh2
May 28 20:11:15 zimbra sshd[18639]: Received disconnect from 121.237.250.31 port 45684:11: Bye Bye [preauth]
May 28 20:11:15 zimbra sshd[18639]: Disconnected from 121.237.250.31 port 45684 [preauth]
May 28 20:15:10 zimb........
-------------------------------

Invalid user test from 121.237.220.4 port 33926

Invalid user test from 121.237.220.4 port 33926

Telnet/23 MH Probe, Scan, BF, Hack -

Jan 13 08:24:27 meumeu sshd[31885]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.237.241.241 
Jan 13 08:24:28 meumeu sshd[31885]: Failed password for invalid user shao from 121.237.241.241 port 55169 ssh2
Jan 13 08:26:49 meumeu sshd[32355]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.237.241.241 
...

(sshd) Failed SSH login from 121.237.241.241 (-): 5 in the last 3600 secs

Dec 26 23:44:22 mail sshd[15348]: Invalid user jbratter from 121.237.241.241
...

2019-12-20T06:28:43.177620homeassistant sshd[2542]: Invalid user izene from 121.237.241.241 port 54994
2019-12-20T06:28:43.187079homeassistant sshd[2542]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.237.241.241
...

The IP has triggered Cloudflare WAF. CF-Ray: 54383ff4dbfbe516 | WAF_Rule_ID: 1112824 | WAF_Kind: firewall | CF_Action: challenge | Country: CN | CF_IPClass: noRecord | Protocol: HTTP/1.1 | Method: GET | Host: ip.skk.moe | User-Agent: Mozilla/5.0 (Linux; U; Android 4.3; en-us; SM-N900T Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 | CF_DC: LAX. Report generated by Cloudflare-WAF-to-AbuseIPDB (https://github.com/SukkaW/Cloudflare-WAF-to-AbuseIPDB).

The IP has triggered Cloudflare WAF. CF-Ray: 5435c746d9b8d34a | WAF_Rule_ID: 53b8357af6d244d3a132bcf913c3a388 | WAF_Kind: firewall | CF_Action: drop | Country: CN | CF_IPClass: noRecord | Protocol: HTTP/1.1 | Method: GET | Host: disqus.skk.moe | User-Agent: Mozilla/4.047745454 Mozilla/4.0 (compatible; MSIE 5.00; Windows 98) | CF_DC: LAX. Report generated by Cloudflare-WAF-to-AbuseIPDB (https://github.com/SukkaW/Cloudflare-WAF-to-AbuseIPDB).

The IP has triggered Cloudflare WAF. CF-Ray: 543447ce1922788a | WAF_Rule_ID: 3b40188685924a32bf11d40edea05a27 | WAF_Kind: firewall | CF_Action: drop | Country: CN | CF_IPClass: noRecord | Protocol: HTTP/1.1 | Method: GET | Host: d.skk.moe | User-Agent: Mozilla/5.0 (Linux; U; Android 4.3; en-us; SM-N900T Build/JSS15J) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 | CF_DC: LAX. Report generated by Cloudflare-WAF-to-AbuseIPDB (https://github.com/SukkaW/Cloudflare-WAF-to-AbuseIPDB).

Jun  1 00:06:41 serwer sshd\[17227\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.252.168.75  user=root
Jun  1 00:06:44 serwer sshd\[17227\]: Failed password for root from 103.252.168.75 port 42004 ssh2
Jun  1 00:13:23 serwer sshd\[18043\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.252.168.75  user=root
Jun  1 00:33:29 serwer sshd\[20030\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.252.168.75  user=root
Jun  1 00:33:31 serwer sshd\[20030\]: Failed password for root from 103.252.168.75 port 55480 ssh2
Jun  1 00:40:08 serwer sshd\[20872\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.252.168.75  user=root
Jun  1 01:00:09 serwer sshd\[22895\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.252.168.75  user=root
Jun  1 01:00:12 serwer sshd
...

Jun  1 16:19:15 [host] kernel: [7649578.113045] [U
Jun  1 16:25:23 [host] kernel: [7649945.465212] [U
Jun  1 16:32:57 [host] kernel: [7650399.654483] [U
Jun  1 16:36:39 [host] kernel: [7650621.269055] [U
Jun  1 16:41:54 [host] kernel: [7650936.511373] [U
Jun  1 16:43:59 [host] kernel: [7651061.477540] [U

2020-06-01T07:43:02.4572461495-001 sshd[28743]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.52.234  user=root
2020-06-01T07:43:04.3313061495-001 sshd[28743]: Failed password for root from 106.13.52.234 port 42158 ssh2
2020-06-01T07:45:54.0051651495-001 sshd[28885]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.52.234  user=root
2020-06-01T07:45:56.0202431495-001 sshd[28885]: Failed password for root from 106.13.52.234 port 53918 ssh2
2020-06-01T07:48:46.7805611495-001 sshd[28956]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.52.234  user=root
2020-06-01T07:48:49.2101151495-001 sshd[28956]: Failed password for root from 106.13.52.234 port 37450 ssh2
...

Jun  2 00:43:24 localhost sshd[2424966]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=212.239.177.39  user=root
Jun  2 00:43:26 localhost sshd[2424966]: Failed password for root from 212.239.177.39 port 56184 ssh2
...

Dovecot Invalid User Login Attempt.

May 30 16:17:25 serwer sshd\[28673\]: Invalid user testuser1 from 103.44.248.87 port 42929
May 30 16:17:25 serwer sshd\[28673\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.248.87
May 30 16:17:28 serwer sshd\[28673\]: Failed password for invalid user testuser1 from 103.44.248.87 port 42929 ssh2
May 30 16:23:46 serwer sshd\[29223\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.248.87  user=root
May 30 16:23:47 serwer sshd\[29223\]: Failed password for root from 103.44.248.87 port 44186 ssh2
May 30 16:27:16 serwer sshd\[29566\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.248.87  user=root
May 30 16:27:17 serwer sshd\[29566\]: Failed password for root from 103.44.248.87 port 58939 ssh2
May 30 16:30:05 serwer sshd\[29856\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.44.248.87  us
...

fail2ban -- 210.97.40.44
...

Port Scan detected!
...

2020-05-01 18:08:02 1jUYCi-00047T-NV SMTP connection from \(\[1.46.239.61\]\) \[1.46.239.61\]:60602 I=\[193.107.88.166\]:25 closed by DROP in ACL
2020-05-01 18:09:17 1jUYDt-0004AE-5R SMTP connection from \(\[1.46.239.61\]\) \[1.46.239.61\]:60603 I=\[193.107.88.166\]:25 closed by DROP in ACL
2020-05-01 18:10:18 1jUYEr-0004EH-1r SMTP connection from \(\[1.46.239.61\]\) \[1.46.239.61\]:60604 I=\[193.107.88.166\]:25 closed by DROP in ACL
...

Jun  1 13:56:18 ns382633 sshd\[921\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=118.113.165.112  user=root
Jun  1 13:56:20 ns382633 sshd\[921\]: Failed password for root from 118.113.165.112 port 40340 ssh2
Jun  1 14:03:17 ns382633 sshd\[1965\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=118.113.165.112  user=root
Jun  1 14:03:19 ns382633 sshd\[1965\]: Failed password for root from 118.113.165.112 port 51137 ssh2
Jun  1 14:07:12 ns382633 sshd\[2820\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=118.113.165.112  user=root

2020-03-14 13:57:01 H=\(\[1.46.228.100\]\) \[1.46.228.100\]:9873 I=\[193.107.88.166\]:25 F=\ rejected RCPT \: Sender verify failed
2020-03-14 13:58:05 H=\(\[1.46.228.100\]\) \[1.46.228.100\]:9874 I=\[193.107.88.166\]:25 F=\ rejected RCPT \: Sender verify failed
2020-03-14 13:59:11 H=\(\[1.46.228.100\]\) \[1.46.228.100\]:9875 I=\[193.107.88.166\]:25 F=\ rejected RCPT \: Sender verify failed
...

imap-login: Disconnected \(auth failed, 1 attempts in 6

139.59.5.179 - - [01/Jun/2020:15:24:27 +0200] "GET /wp-login.php HTTP/1.1" 200 6364 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
139.59.5.179 - - [01/Jun/2020:15:24:30 +0200] "POST /wp-login.php HTTP/1.1" 200 6615 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
139.59.5.179 - - [01/Jun/2020:15:24:31 +0200] "POST /xmlrpc.php HTTP/1.1" 200 427 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"

$f2bV_matches

SSH Brute-Forcing (server1)