Aug 13 22:45:28 localhost sshd\[25979\]: Invalid user millicent from 106.13.46.114 port 58222
Aug 13 22:45:28 localhost sshd\[25979\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.46.114
Aug 13 22:45:31 localhost sshd\[25979\]: Failed password for invalid user millicent from 106.13.46.114 port 58222 ssh2

Aug 13 21:23:20 mail sshd\[21152\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=195.206.105.217  user=root
Aug 13 21:23:22 mail sshd\[21152\]: Failed password for root from 195.206.105.217 port 41666 ssh2
Aug 13 21:23:25 mail sshd\[21152\]: Failed password for root from 195.206.105.217 port 41666 ssh2
Aug 13 21:23:28 mail sshd\[21152\]: Failed password for root from 195.206.105.217 port 41666 ssh2
Aug 13 21:23:31 mail sshd\[21152\]: Failed password for root from 195.206.105.217 port 41666 ssh2

Multiple SSH auth failures recorded by fail2ban

WordPress XMLRPC scan :: 173.254.226.135 0.184 BYPASS [14/Aug/2019:04:25:35  1000] www.[censored_1] "POST /xmlrpc.php HTTP/1.1" 200 382 "https://www.[censored_1]/" "PHP/7.3.21"

Aug 13 22:20:59 SilenceServices sshd[20741]: Failed password for root from 54.38.156.181 port 54688 ssh2
Aug 13 22:26:57 SilenceServices sshd[24405]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.38.156.181
Aug 13 22:26:59 SilenceServices sshd[24405]: Failed password for invalid user linda from 54.38.156.181 port 47580 ssh2

Aug 13 20:23:47 mail sshd\[11284\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.42.116.18  user=root
Aug 13 20:23:49 mail sshd\[11284\]: Failed password for root from 192.42.116.18 port 47860 ssh2
Aug 13 20:23:52 mail sshd\[11284\]: Failed password for root from 192.42.116.18 port 47860 ssh2
Aug 13 20:23:54 mail sshd\[11284\]: Failed password for root from 192.42.116.18 port 47860 ssh2
Aug 13 20:23:57 mail sshd\[11284\]: Failed password for root from 192.42.116.18 port 47860 ssh2

Aug 13 22:12:38 lumpi kernel: INPUT:DROP:SPAMHAUS_DROP:IN=eth0 OUT= MAC=52:54:a2:01:a5:04:d2:74:7f:6e:37:e3:08:00 SRC=185.222.211.114 DST=172.31.1.100 LEN=40 TOS=0x00 PREC=0x00 TTL=245 ID=51356 PROTO=TCP SPT=8080 DPT=33399 WINDOW=1024 RES=0x00 SYN URGP=0 
...

Aug 13 20:19:19 root sshd[5390]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.4.4.121 
Aug 13 20:19:21 root sshd[5390]: Failed password for invalid user dev from 42.4.4.121 port 59819 ssh2
Aug 13 20:25:58 root sshd[5425]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.4.4.121 
...

Aug 13 21:42:30 Proxmox sshd\[29702\]: User root from 150.140.189.33 not allowed because not listed in AllowUsers
Aug 13 21:42:30 Proxmox sshd\[29702\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=150.140.189.33  user=root
Aug 13 21:42:33 Proxmox sshd\[29702\]: Failed password for invalid user root from 150.140.189.33 port 56266 ssh2

Scan for word-press application/login

\[2019-08-13 22:23:57\] NOTICE\[5713\] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '\' failed for '77.234.46.145:5987' \(callid: 627922654-1829003958-458813453\) - Failed to authenticate
\[2019-08-13 22:23:57\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2019-08-13T22:23:57.475+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="\",SessionID="627922654-1829003958-458813453",LocalAddress="IPV4/UDP/188.40.118.248/5060",RemoteAddress="IPV4/UDP/77.234.46.145/5987",Challenge="1565727837/1f8f0cf151489e941cd77f7763c2fb0a",Response="325d83befecdb5d5dbd7667c28bb7879",ExpectedResponse=""
\[2019-08-13 22:23:57\] NOTICE\[18654\] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '\' failed for '77.234.46.145:5987' \(callid: 627922654-1829003958-458813453\) - Failed to authenticate
\[2019-08-13 22:23:57\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseFailed

08/13/2019-16:20:07.610872 185.176.27.18 Protocol: 6 ET SCAN NMAP -sS window 1024

2019-08-13T18:26:02.257312abusebot.cloudsearch.cf sshd\[6249\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=ec2-13-235-43-238.ap-south-1.compute.amazonaws.com  user=root

Aug 13 22:47:52 MK-Soft-Root1 sshd\[23646\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=23.129.64.183  user=root
Aug 13 22:47:54 MK-Soft-Root1 sshd\[23646\]: Failed password for root from 23.129.64.183 port 50911 ssh2
Aug 13 22:47:56 MK-Soft-Root1 sshd\[23646\]: Failed password for root from 23.129.64.183 port 50911 ssh2
...

Reported by AbuseIPDB proxy server.