Apr 30 07:12:46 server dovecot: imap-login: Aborted login (auth failed, 1 attempts in 2 secs): user=, method=PLAIN, rip=2a02:a03f:3e3b:d900:d176:4bcc:d7cf:f1f8, lip=2a01:7e01:e001:164::, session=<3b5oHXuk3NcqAqA/PjvZANF2S8zXz/H4>
Apr 30 07:12:52 server dovecot: imap-login: Aborted login (auth failed, 1 attempts in 6 secs): user=, method=PLAIN, rip=2a02:a03f:3e3b:d900:d176:4bcc:d7cf:f1f8, lip=2a01:7e01:e001:164::, session=
Apr 30 07:12:52 server dovecot: imap-login: Aborted login (auth failed, 1 attempts in 6 secs): user=, method=PLAIN, rip=2a02:a03f:3e3b:d900:d176:4bcc:d7cf:f1f8, lip=2a01:7e01:e001:164::, session=
Apr 30 07:13:03 server dovecot: imap-login: Aborted login (auth failed, 1 attempts in 6 secs): user=, method=PLAIN, rip=2a02:a03f:3e3b:d900:d176:4bcc:d7cf:f1f8, lip=2a01:7e01:e001:164::, session=

$f2bV_matches

May  7 06:50:17 piServer sshd[29895]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=77.158.71.118 
May  7 06:50:19 piServer sshd[29895]: Failed password for invalid user bip from 77.158.71.118 port 51428 ssh2
May  7 06:53:55 piServer sshd[30191]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=77.158.71.118 
...

Honeypot attack, port: 81, PTR: PTR record not found

May  7 07:42:09 piServer sshd[2280]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=195.231.0.89 
May  7 07:42:12 piServer sshd[2280]: Failed password for invalid user sunny from 195.231.0.89 port 58426 ssh2
May  7 07:45:27 piServer sshd[2586]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=195.231.0.89 
...

2020-05-07T04:06:10.017638abusebot-2.cloudsearch.cf sshd[914]: Invalid user shania from 144.217.242.247 port 57558
2020-05-07T04:06:10.023939abusebot-2.cloudsearch.cf sshd[914]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=247.ip-144-217-242.net
2020-05-07T04:06:10.017638abusebot-2.cloudsearch.cf sshd[914]: Invalid user shania from 144.217.242.247 port 57558
2020-05-07T04:06:12.482375abusebot-2.cloudsearch.cf sshd[914]: Failed password for invalid user shania from 144.217.242.247 port 57558 ssh2
2020-05-07T04:11:28.994403abusebot-2.cloudsearch.cf sshd[1203]: Invalid user kato from 144.217.242.247 port 44646
2020-05-07T04:11:29.006020abusebot-2.cloudsearch.cf sshd[1203]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=247.ip-144-217-242.net
2020-05-07T04:11:28.994403abusebot-2.cloudsearch.cf sshd[1203]: Invalid user kato from 144.217.242.247 port 44646
2020-05-07T04:11:30.436611abusebot-2.cloudsearch.cf s
...

Honeypot attack, port: 445, PTR: 201-210-11-119.genericrev.cantv.net.

May  6 03:24:48 vayu sshd[713511]: Address 222.253.33.14 maps to static.vnpt.vn, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
May  6 03:24:48 vayu sshd[713511]: Invalid user stuser from 222.253.33.14
May  6 03:24:48 vayu sshd[713511]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.253.33.14 
May  6 03:24:51 vayu sshd[713511]: Failed password for invalid user stuser from 222.253.33.14 port 49983 ssh2
May  6 03:24:51 vayu sshd[713511]: Received disconnect from 222.253.33.14: 11: Bye Bye [preauth]
May  6 03:29:18 vayu sshd[715232]: Address 222.253.33.14 maps to static.vnpt.vn, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
May  6 03:29:18 vayu sshd[715232]: Invalid user qin from 222.253.33.14
May  6 03:29:18 vayu sshd[715232]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.253.33.14 


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

SSH authentication failure x 6 reported by Fail2Ban
...

May  7 02:13:57 ws24vmsma01 sshd[170582]: Failed password for root from 2.30.104.116 port 55468 ssh2
...

May  7 06:56:47 vmanager6029 sshd\[14937\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.205  user=root
May  7 06:56:49 vmanager6029 sshd\[14935\]: error: PAM: Authentication failure for root from 218.92.0.205
May  7 06:56:51 vmanager6029 sshd\[14940\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.205  user=root

$f2bV_matches

(smtpauth) Failed SMTP AUTH login from 195.231.3.155 (IT/Italy/host155-3-231-195.serverdedicati.aruba.it): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: 2020-05-07 08:26:31 login authenticator failed for (USER) [195.231.3.155]: 535 Incorrect authentication data (set_id=cumplmsameargaasta193)

$f2bV_matches

May  7 07:22:00 v22019038103785759 sshd\[24976\]: Invalid user citroen from 62.210.136.159 port 41062
May  7 07:22:00 v22019038103785759 sshd\[24976\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=62.210.136.159
May  7 07:22:03 v22019038103785759 sshd\[24976\]: Failed password for invalid user citroen from 62.210.136.159 port 41062 ssh2
May  7 07:25:20 v22019038103785759 sshd\[25202\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=62.210.136.159  user=root
May  7 07:25:22 v22019038103785759 sshd\[25202\]: Failed password for root from 62.210.136.159 port 44828 ssh2
...

$f2bV_matches