Mar  3 16:41:08 localhost sshd\[31282\]: Invalid user tanwei from 107.170.20.247 port 38631
Mar  3 16:41:08 localhost sshd\[31282\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=107.170.20.247
Mar  3 16:41:10 localhost sshd\[31282\]: Failed password for invalid user tanwei from 107.170.20.247 port 38631 ssh2

Email rejected due to spam filtering

Dec 26 15:20:42 mercury wordpress(www.learnargentinianspanish.com)[21303]: XML-RPC authentication attempt for unknown user silvina from 103.82.43.118
...

Mar  3 05:33:00 web9 sshd\[23871\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.182  user=root
Mar  3 05:33:02 web9 sshd\[23871\]: Failed password for root from 222.186.175.182 port 12438 ssh2
Mar  3 05:33:05 web9 sshd\[23871\]: Failed password for root from 222.186.175.182 port 12438 ssh2
Mar  3 05:33:08 web9 sshd\[23871\]: Failed password for root from 222.186.175.182 port 12438 ssh2
Mar  3 05:33:11 web9 sshd\[23871\]: Failed password for root from 222.186.175.182 port 12438 ssh2

suspicious action Tue, 03 Mar 2020 10:24:18 -0300

Jan  4 10:23:21 mercury wordpress(www.learnargentinianspanish.com)[15829]: XML-RPC authentication attempt for unknown user chris from 103.84.36.130
...

Unauthorised access (Mar  3) SRC=59.125.155.119 LEN=40 TTL=45 ID=53297 TCP DPT=8080 WINDOW=41856 SYN

Mar  2 16:28:06 django sshd[127889]: reveeclipse mapping checking getaddrinfo for pulistsouias.us [210.48.146.61] failed - POSSIBLE BREAK-IN ATTEMPT!
Mar  2 16:28:06 django sshd[127889]: Invalid user ftpuser from 210.48.146.61
Mar  2 16:28:06 django sshd[127889]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=210.48.146.61 
Mar  2 16:28:08 django sshd[127889]: Failed password for invalid user ftpuser from 210.48.146.61 port 54022 ssh2
Mar  2 16:28:08 django sshd[127890]: Received disconnect from 210.48.146.61: 11: Normal Shutdown
Mar  2 16:32:01 django sshd[128142]: reveeclipse mapping checking getaddrinfo for pulistsouias.us [210.48.146.61] failed - POSSIBLE BREAK-IN ATTEMPT!
Mar  2 16:32:01 django sshd[128142]: Invalid user www from 210.48.146.61
Mar  2 16:32:01 django sshd[128142]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=210.48.146.61 


........
-----------------------------------------------
https://www.blocklist.de/

Dec 11 14:59:23 mercury kernel: [UFW ALLOW] IN=eth0 OUT= MAC=f2:3c:91:bc:4d:f8:84:78:ac:0d:8f:41:08:00 SRC=106.107.209.64 DST=109.74.200.221 LEN=32 TOS=0x00 PREC=0x00 TTL=46 ID=0 DF PROTO=UDP SPT=123 DPT=123 LEN=12 
...

Mar  3 12:44:21 server sshd\[19168\]: Failed password for root from 222.186.42.7 port 64402 ssh2
Mar  3 18:44:33 server sshd\[22620\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.42.7  user=root
Mar  3 18:44:34 server sshd\[22620\]: Failed password for root from 222.186.42.7 port 39526 ssh2
Mar  3 18:44:35 server sshd\[22614\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.42.7  user=root
Mar  3 18:44:36 server sshd\[22626\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.42.7  user=root
...

Dec 11 17:17:36 mercury kernel: [UFW ALLOW] IN=eth0 OUT= MAC=f2:3c:91:bc:4d:f8:84:78:ac:5a:1a:41:08:00 SRC=106.107.161.24 DST=109.74.200.221 LEN=32 TOS=0x00 PREC=0x00 TTL=44 ID=0 DF PROTO=UDP SPT=123 DPT=123 LEN=12 
...

Mar  3 05:16:44 hanapaa sshd\[26806\]: Invalid user air from 51.75.248.57
Mar  3 05:16:44 hanapaa sshd\[26806\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=57.ip-51-75-248.eu
Mar  3 05:16:46 hanapaa sshd\[26806\]: Failed password for invalid user air from 51.75.248.57 port 47350 ssh2
Mar  3 05:25:37 hanapaa sshd\[27518\]: Invalid user purnima from 51.75.248.57
Mar  3 05:25:37 hanapaa sshd\[27518\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=57.ip-51-75-248.eu

SSH Brute-Force reported by Fail2Ban

2020-01-24T12:03:18.705Z CLOSE host=103.39.157.74 port=62878 fd=4 time=50.040 bytes=61
...

Jan 21 00:18:28 mercury smtpd[1181]: 7f951bc1d93098b7 smtp event=failed-command address=178.159.98.59 host=178.159.98.59 command="RCPT to:" result="550 Invalid recipient"
...