Tried to find non-existing directory/file on the server

May  4 22:10:37 vps46666688 sshd[27860]: Failed password for invalid user admin from 157.157.87.22 port 34218 ssh2
May  4 22:10:40 vps46666688 sshd[27860]: Failed password for invalid user admin from 157.157.87.22 port 34218 ssh2
May  4 22:10:40 vps46666688 sshd[27860]: error: maximum authentication attempts exceeded for invalid user admin from 157.157.87.22 port 34218 ssh2 [preauth]
...

May  5 09:48:40 webhost01 sshd[8791]: Failed password for root from 62.234.102.25 port 44138 ssh2
May  5 09:53:52 webhost01 sshd[9358]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=62.234.102.25
...

May  5 04:00:12 srv-ubuntu-dev3 sshd[51253]: Invalid user etp from 82.208.99.54
May  5 04:00:12 srv-ubuntu-dev3 sshd[51253]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=82.208.99.54
May  5 04:00:12 srv-ubuntu-dev3 sshd[51253]: Invalid user etp from 82.208.99.54
May  5 04:00:14 srv-ubuntu-dev3 sshd[51253]: Failed password for invalid user etp from 82.208.99.54 port 53409 ssh2
May  5 04:04:10 srv-ubuntu-dev3 sshd[51914]: Invalid user linux from 82.208.99.54
May  5 04:04:10 srv-ubuntu-dev3 sshd[51914]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=82.208.99.54
May  5 04:04:10 srv-ubuntu-dev3 sshd[51914]: Invalid user linux from 82.208.99.54
May  5 04:04:12 srv-ubuntu-dev3 sshd[51914]: Failed password for invalid user linux from 82.208.99.54 port 57397 ssh2
May  5 04:07:57 srv-ubuntu-dev3 sshd[52481]: Invalid user postgres from 82.208.99.54
...

2020-05-04T21:10:09.266800mail.thespaminator.com sshd[26605]: Invalid user isaac from 95.255.14.141 port 51054
2020-05-04T21:10:11.652562mail.thespaminator.com sshd[26605]: Failed password for invalid user isaac from 95.255.14.141 port 51054 ssh2
...

Triggered by Fail2Ban at Ares web server

firewall-block, port(s): 8080/tcp

20/5/4@21:41:58: FAIL: Alarm-Network address from=115.79.102.233
...

May  5 05:44:17 vps sshd[760125]: Failed password for root from 222.186.30.218 port 17112 ssh2
May  5 05:44:19 vps sshd[760125]: Failed password for root from 222.186.30.218 port 17112 ssh2
May  5 05:51:33 vps sshd[799956]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.30.218  user=root
May  5 05:51:35 vps sshd[799956]: Failed password for root from 222.186.30.218 port 12502 ssh2
May  5 05:51:37 vps sshd[799956]: Failed password for root from 222.186.30.218 port 12502 ssh2
...

Email rejected due to spam filtering

[2020-05-04 23:36:57] NOTICE[1157] chan_sip.c: Registration from '' failed for '185.147.215.14:63369' - Wrong password
[2020-05-04 23:36:57] SECURITY[1173] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-05-04T23:36:57.204-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="63",SessionID="0x7f5f100266a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.147.215.14/63369",Challenge="012dbbe3",ReceivedChallenge="012dbbe3",ReceivedHash="b4344640c32ba71a362a10aaf79fd8da"
[2020-05-04 23:37:10] NOTICE[1157] chan_sip.c: Registration from '' failed for '185.147.215.14:56328' - Wrong password
[2020-05-04 23:37:10] SECURITY[1173] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-05-04T23:37:10.080-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="63",SessionID="0x7f5f1001be58",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.147.215.14/563
...

firewall-block, port(s): 623/udp

May  5 05:33:46 buvik sshd[31381]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.200.247.7
May  5 05:33:48 buvik sshd[31381]: Failed password for invalid user sale from 14.200.247.7 port 40330 ssh2
May  5 05:38:25 buvik sshd[32086]: Invalid user test from 14.200.247.7
...

2020-05-05T01:01:48.519707randservbullet-proofcloud-66.localdomain sshd[28332]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=065-191-076-227.inf.spectrum.com  user=root
2020-05-05T01:01:51.112381randservbullet-proofcloud-66.localdomain sshd[28332]: Failed password for root from 65.191.76.227 port 48916 ssh2
2020-05-05T01:10:15.845453randservbullet-proofcloud-66.localdomain sshd[28392]: Invalid user sonic from 65.191.76.227 port 49828
...

May  5 05:36:21 web01 sshd[14989]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.231.94.95 
May  5 05:36:23 web01 sshd[14989]: Failed password for invalid user maira from 111.231.94.95 port 60082 ssh2
...