Invalid user rd from 206.189.139.179 port 35088

2020-06-13 22:47:52.172925-0500  localhost smtpd[97519]: NOQUEUE: reject: RCPT from unknown[185.225.39.240]: 554 5.7.1 Service unavailable; Client host [185.225.39.240] blocked using zen.spamhaus.org; https://www.spamhaus.org/sbl/query/SBLCSS; from= to= proto=ESMTP helo=

$f2bV_matches

(mod_security) mod_security (id:5000135) triggered by 113.160.87.66 (VN/Vietnam/static.vnpt.vn): 10 in the last 3600 secs; ID: rub

2020-06-14T11:38:16.408204snf-827550 sshd[3747]: Failed password for root from 67.205.137.32 port 33296 ssh2
2020-06-14T11:40:21.233584snf-827550 sshd[3771]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=67.205.137.32  user=root
2020-06-14T11:40:22.817144snf-827550 sshd[3771]: Failed password for root from 67.205.137.32 port 42610 ssh2
...

Lines containing failures of 104.42.76.121
Jun 12 06:23:39 zabbix sshd[81213]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=104.42.76.121  user=r.r
Jun 12 06:23:40 zabbix sshd[81213]: Failed password for r.r from 104.42.76.121 port 53692 ssh2
Jun 12 06:23:41 zabbix sshd[81213]: Received disconnect from 104.42.76.121 port 53692:11: Bye Bye [preauth]
Jun 12 06:23:41 zabbix sshd[81213]: Disconnected from authenticating user r.r 104.42.76.121 port 53692 [preauth]
Jun 12 06:34:22 zabbix sshd[87288]: Invalid user library1 from 104.42.76.121 port 51216
Jun 12 06:34:22 zabbix sshd[87288]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=104.42.76.121
Jun 12 06:34:24 zabbix sshd[87288]: Failed password for invalid user library1 from 104.42.76.121 port 51216 ssh2
Jun 12 06:34:24 zabbix sshd[87288]: Received disconnect from 104.42.76.121 port 51216:11: Bye Bye [preauth]
Jun 12 06:34:24 zabbix sshd[872........
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1592106498 - 06/14/2020 05:48:18 Host: 36.76.75.167/36.76.75.167 Port: 445 TCP Blocked

Trolling for resource vulnerabilities

ssh intrusion attempt

Jun 14 08:58:19 localhost sshd[65673]: Invalid user voice from 68.183.137.173 port 60008
Jun 14 08:58:19 localhost sshd[65673]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=68.183.137.173
Jun 14 08:58:19 localhost sshd[65673]: Invalid user voice from 68.183.137.173 port 60008
Jun 14 08:58:21 localhost sshd[65673]: Failed password for invalid user voice from 68.183.137.173 port 60008 ssh2
Jun 14 09:03:42 localhost sshd[66255]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=68.183.137.173  user=root
Jun 14 09:03:44 localhost sshd[66255]: Failed password for root from 68.183.137.173 port 48852 ssh2
...

Jun 14 12:08:57 server sshd[9519]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=122.146.196.217
Jun 14 12:08:59 server sshd[9519]: Failed password for invalid user et from 122.146.196.217 port 60127 ssh2
Jun 14 12:15:06 server sshd[10153]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=122.146.196.217
...

Jun 14 10:53:50 ns3164893 sshd[3685]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.240.80.31
Jun 14 10:53:52 ns3164893 sshd[3685]: Failed password for invalid user luke from 223.240.80.31 port 50409 ssh2
...

SSH Brute-Forcing (server2)

Jun 14 11:31:56 vmd26974 sshd[8214]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=190.215.112.122
Jun 14 11:31:58 vmd26974 sshd[8214]: Failed password for invalid user tls from 190.215.112.122 port 46401 ssh2
...

06/14/2020-06:04:57.322000 222.186.30.76 Protocol: 6 ET SCAN Potential SSH Scan