Jun 10 02:09:58 dhoomketu sshd[613231]: Failed password for root from 106.54.197.97 port 50934 ssh2
Jun 10 02:13:07 dhoomketu sshd[613247]: Invalid user default from 106.54.197.97 port 47902
Jun 10 02:13:07 dhoomketu sshd[613247]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.54.197.97 
Jun 10 02:13:07 dhoomketu sshd[613247]: Invalid user default from 106.54.197.97 port 47902
Jun 10 02:13:09 dhoomketu sshd[613247]: Failed password for invalid user default from 106.54.197.97 port 47902 ssh2
...

Dovecot Invalid User Login Attempt.

(sshd) Failed SSH login from 37.49.224.156 (EE/Estonia/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SSHD; Logs: Jun  9 22:20:04 amsweb01 sshd[27897]: Did not receive identification string from 37.49.224.156 port 35230
Jun  9 22:20:29 amsweb01 sshd[27944]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.224.156  user=root
Jun  9 22:20:30 amsweb01 sshd[27944]: Failed password for root from 37.49.224.156 port 53326 ssh2
Jun  9 22:20:53 amsweb01 sshd[27954]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.49.224.156  user=root
Jun  9 22:20:55 amsweb01 sshd[27954]: Failed password for root from 37.49.224.156 port 38120 ssh2

TCP Port Scanning

(sshd) Failed SSH login from 167.99.66.193 (SG/Singapore/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SSHD; Logs: Jun  9 22:10:30 elude sshd[17892]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.99.66.193  user=root
Jun  9 22:10:32 elude sshd[17892]: Failed password for root from 167.99.66.193 port 32912 ssh2
Jun  9 22:17:00 elude sshd[18850]: Invalid user lc from 167.99.66.193 port 48819
Jun  9 22:17:02 elude sshd[18850]: Failed password for invalid user lc from 167.99.66.193 port 48819 ssh2
Jun  9 22:20:22 elude sshd[19374]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.99.66.193  user=root

Jun  9 22:48:03 PorscheCustomer sshd[13545]: Failed password for root from 222.186.31.166 port 48723 ssh2
Jun  9 22:48:35 PorscheCustomer sshd[13562]: Failed password for root from 222.186.31.166 port 13948 ssh2
Jun  9 22:48:37 PorscheCustomer sshd[13562]: Failed password for root from 222.186.31.166 port 13948 ssh2
...

Jun  9 22:55:33 piServer sshd[14737]: Failed password for root from 179.212.136.198 port 23708 ssh2
Jun  9 22:59:54 piServer sshd[15146]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=179.212.136.198 
Jun  9 22:59:56 piServer sshd[15146]: Failed password for invalid user tsunoda from 179.212.136.198 port 7149 ssh2
...

2020-06-09T20:28:05.584235shield sshd\[20152\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.180.41  user=root
2020-06-09T20:28:06.993058shield sshd\[20152\]: Failed password for root from 222.186.180.41 port 35570 ssh2
2020-06-09T20:28:10.019761shield sshd\[20152\]: Failed password for root from 222.186.180.41 port 35570 ssh2
2020-06-09T20:28:12.789962shield sshd\[20152\]: Failed password for root from 222.186.180.41 port 35570 ssh2
2020-06-09T20:28:15.500672shield sshd\[20152\]: Failed password for root from 222.186.180.41 port 35570 ssh2

Jun  9 22:11:41 minden010 postfix/smtpd[30195]: NOQUEUE: reject: RCPT from p2e532b1b.dip0.t-ipconnect.de[46.83.43.27]: 450 4.7.1 : Helo command rejected: Host not found; from=<> to= proto=ESMTP helo=
Jun  9 22:20:14 minden010 postfix/smtpd[1057]: NOQUEUE: reject: RCPT from p2e532b1b.dip0.t-ipconnect.de[46.83.43.27]: 450 4.7.1 : Helo command rejected: Host not found; from= to= proto=ESMTP helo=
Jun  9 22:20:15 minden010 postfix/smtpd[5180]: NOQUEUE: reject: RCPT from p2e532b1b.dip0.t-ipconnect.de[46.83.43.27]: 450 4.7.1 : Helo command rejected: Host not found; from= to= proto=ESMTP helo=
Jun  9 22:20:15 minden010 postfix/smtpd[5181]: NOQUEUE: reject: RCPT from p2e532b1b.dip0.t-ipconnect.de[46.83.43.27]: 450 4.7.1 : Helo command rejected: Host not found; from=

Jun  9 20:20:38 ws26vmsma01 sshd[139908]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=203.205.37.224
Jun  9 20:20:40 ws26vmsma01 sshd[139908]: Failed password for invalid user ralf from 203.205.37.224 port 34186 ssh2
...

4 failed login attempts (2 lockout(s)) from IP: 139.162.242.157

Last user attempted: [login]

IP was blocked for 100 hours

2020-06-09T14:29:02.031977linuxbox-skyline auth[272178]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=owl rhost=87.246.7.66
...

\[Jun 10 06:19:50\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '141.98.10.127:50677' - Wrong password
\[Jun 10 06:19:56\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '141.98.10.127:62101' - Wrong password
\[Jun 10 06:20:00\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '141.98.10.127:55653' - Wrong password
\[Jun 10 06:20:01\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '141.98.10.127:57950' - Wrong password
\[Jun 10 06:20:07\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '141.98.10.127:54080' - Wrong password
\[Jun 10 06:20:11\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '141.98.10.127:64064' - Wrong password
\[Jun 10 06:20:16\] NOTICE\[2019\] chan_sip.c: Registration from '\' f
...

2020-06-09T22:17:11.951268v22018076590370373 sshd[5058]: Invalid user rosi from 178.128.70.61 port 55030
2020-06-09T22:17:11.958585v22018076590370373 sshd[5058]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.128.70.61
2020-06-09T22:17:11.951268v22018076590370373 sshd[5058]: Invalid user rosi from 178.128.70.61 port 55030
2020-06-09T22:17:13.584933v22018076590370373 sshd[5058]: Failed password for invalid user rosi from 178.128.70.61 port 55030 ssh2
2020-06-09T22:20:54.009183v22018076590370373 sshd[14957]: Invalid user paloma from 178.128.70.61 port 53744
...

firewall-block, port(s): 445/tcp