May 10 00:44:31 web01.agentur-b-2.de postfix/smtpd[452766]: warning: unknown[2002:b9ea:d8ce::b9ea:d8ce]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
May 10 00:44:31 web01.agentur-b-2.de postfix/smtpd[452766]: lost connection after AUTH from unknown[2002:b9ea:d8ce::b9ea:d8ce]
May 10 00:48:30 web01.agentur-b-2.de postfix/smtpd[448103]: warning: unknown[2002:b9ea:d8ce::b9ea:d8ce]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
May 10 00:48:30 web01.agentur-b-2.de postfix/smtpd[448103]: lost connection after AUTH from unknown[2002:b9ea:d8ce::b9ea:d8ce]
May 10 00:52:10 web01.agentur-b-2.de postfix/smtpd[465652]: warning: unknown[2002:b9ea:d8ce::b9ea:d8ce]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

Port scan on 14 port(s): 1040 1045 1105 1119 1641 2065 3211 3306 5907 5988 5998 6007 10001 61900

May  9 20:26:20 onepixel sshd[2285104]: Failed password for root from 14.29.219.152 port 40341 ssh2
May  9 20:28:56 onepixel sshd[2286395]: Invalid user hagar from 14.29.219.152 port 54254
May  9 20:28:56 onepixel sshd[2286395]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.29.219.152 
May  9 20:28:56 onepixel sshd[2286395]: Invalid user hagar from 14.29.219.152 port 54254
May  9 20:28:59 onepixel sshd[2286395]: Failed password for invalid user hagar from 14.29.219.152 port 54254 ssh2

2020-05-10 01:34:25 dovecot_login authenticator failed for \(User\) \[185.143.75.157\]: 535 Incorrect authentication data \(set_id=ivan@org.ua\)2020-05-10 01:35:05 dovecot_login authenticator failed for \(User\) \[185.143.75.157\]: 535 Incorrect authentication data \(set_id=minli@org.ua\)2020-05-10 01:35:46 dovecot_login authenticator failed for \(User\) \[185.143.75.157\]: 535 Incorrect authentication data \(set_id=traf@org.ua\)
...

May  9 22:23:22 localhost sshd[42869]: Invalid user hive from 111.93.235.74 port 46047
May  9 22:23:22 localhost sshd[42869]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.93.235.74
May  9 22:23:22 localhost sshd[42869]: Invalid user hive from 111.93.235.74 port 46047
May  9 22:23:24 localhost sshd[42869]: Failed password for invalid user hive from 111.93.235.74 port 46047 ssh2
May  9 22:29:00 localhost sshd[43562]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.93.235.74  user=root
May  9 22:29:02 localhost sshd[43562]: Failed password for root from 111.93.235.74 port 43910 ssh2
...

(smtpauth) Failed SMTP AUTH login from 115.68.184.90 (KR/South Korea/-): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: 2020-05-10 00:58:33 login authenticator failed for (USER) [115.68.184.90]: 535 Incorrect authentication data (set_id=contact@jahanayegh.com)

SSH Invalid Login

May  9 22:18:25 localhost sshd\[4952\]: Invalid user teacher from 151.252.141.157 port 56510
May  9 22:18:25 localhost sshd\[4952\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=151.252.141.157
May  9 22:18:28 localhost sshd\[4952\]: Failed password for invalid user teacher from 151.252.141.157 port 56510 ssh2
...

May 10 00:09:24 vps639187 sshd\[6605\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.128.221.85  user=root
May 10 00:09:26 vps639187 sshd\[6605\]: Failed password for root from 178.128.221.85 port 52334 ssh2
May 10 00:13:36 vps639187 sshd\[6703\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.128.221.85  user=root
...

May 10 00:38:57 debian-2gb-nbg1-2 kernel: \[11322811.644153\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=195.54.167.13 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=245 ID=8904 PROTO=TCP SPT=56597 DPT=10504 WINDOW=1024 RES=0x00 SYN URGP=0

May  9 22:18:31 mail.srvfarm.net postfix/smtpd[2337672]: NOQUEUE: reject: RCPT from unknown[217.112.142.32]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=ESMTP helo=
May  9 22:20:15 mail.srvfarm.net postfix/smtpd[2339603]: NOQUEUE: reject: RCPT from unknown[217.112.142.32]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=ESMTP helo=
May  9 22:20:25 mail.srvfarm.net postfix/smtpd[2339603]: NOQUEUE: reject: RCPT from unknown[217.112.142.32]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=ESMTP helo=
May  9 22:22:25 mail.srvfarm.net postfix/smtpd[2339843]: NOQUEUE: reject: RCPT from unknown[217.112.14

May  9 18:13:59 NPSTNNYC01T sshd[21837]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=113.54.156.94
May  9 18:14:01 NPSTNNYC01T sshd[21837]: Failed password for invalid user vs from 113.54.156.94 port 60104 ssh2
May  9 18:19:06 NPSTNNYC01T sshd[22353]: Failed password for root from 113.54.156.94 port 38540 ssh2
...

SSH login attempts brute force.

May 10 00:18:20 web01.agentur-b-2.de postfix/smtpd[448660]: warning: unknown[185.50.149.11]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
May 10 00:18:21 web01.agentur-b-2.de postfix/smtpd[448660]: lost connection after AUTH from unknown[185.50.149.11]
May 10 00:18:29 web01.agentur-b-2.de postfix/smtpd[448103]: lost connection after AUTH from unknown[185.50.149.11]
May 10 00:18:37 web01.agentur-b-2.de postfix/smtpd[448660]: lost connection after AUTH from unknown[185.50.149.11]
May 10 00:18:46 web01.agentur-b-2.de postfix/smtpd[448103]: warning: unknown[185.50.149.11]: SASL LOGIN authentication failed: UGFzc3dvcmQ6

SSH Invalid Login