Feb 21 03:55:33 plusreed sshd[27661]: Invalid user jira from 95.169.7.111
...

Feb 21 05:01:15 firewall sshd[21634]: Invalid user mailman from 210.13.96.74
Feb 21 05:01:18 firewall sshd[21634]: Failed password for invalid user mailman from 210.13.96.74 port 31012 ssh2
Feb 21 05:04:17 firewall sshd[21721]: Invalid user falcon2 from 210.13.96.74
...

Feb 21 05:53:22 grey postfix/smtpd\[16111\]: NOQUEUE: reject: RCPT from unknown\[94.245.132.131\]: 554 5.7.1 Service unavailable\; Client host \[94.245.132.131\] blocked using truncate.gbudb.net\; http://www.gbudb.com/truncate/ \[94.245.132.131\]\; from=\ to=\ proto=SMTP helo=\
...

1582260800 - 02/21/2020 05:53:20 Host: 190.103.31.30/190.103.31.30 Port: 445 TCP Blocked

Feb 21 06:59:36 server sshd[2567986]: Failed password for invalid user gnats from 74.141.132.233 port 50682 ssh2
Feb 21 08:01:44 server sshd[2605344]: Failed password for invalid user mapred from 74.141.132.233 port 59416 ssh2
Feb 21 08:04:53 server sshd[2607151]: Failed password for invalid user debian from 74.141.132.233 port 59874 ssh2

Brute forcing RDP port 3389

Feb 21 08:33:46 IngegnereFirenze sshd[629]: Failed password for invalid user server from 159.203.143.58 port 57560 ssh2
...

Lines containing failures of 51.178.52.185
Feb 19 06:16:52 myhost sshd[2093]: Invalid user user1 from 51.178.52.185 port 36313
Feb 19 06:16:52 myhost sshd[2093]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.178.52.185
Feb 19 06:16:54 myhost sshd[2093]: Failed password for invalid user user1 from 51.178.52.185 port 36313 ssh2
Feb 19 06:16:54 myhost sshd[2093]: Received disconnect from 51.178.52.185 port 36313:11: Bye Bye [preauth]
Feb 19 06:16:54 myhost sshd[2093]: Disconnected from invalid user user1 51.178.52.185 port 36313 [preauth]
Feb 19 06:41:00 myhost sshd[2782]: Invalid user pengcan from 51.178.52.185 port 44637
Feb 19 06:41:00 myhost sshd[2782]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.178.52.185
Feb 19 06:41:03 myhost sshd[2782]: Failed password for invalid user pengcan from 51.178.52.185 port 44637 ssh2
Feb 19 06:41:03 myhost sshd[2782]: Received disconnect from 51.1........
------------------------------

firewall-block, port(s): 33079/tcp

2020-02-21T09:43:22.864473+01:00 lumpi kernel: [7564431.503603] INPUT:DROP:SPAMHAUS_EDROP:IN=eth0 OUT= MAC=52:54:a2:01:a5:04:d2:74:7f:6e:37:e3:08:00 SRC=185.143.223.170 DST=78.46.199.189 LEN=60 TOS=0x00 PREC=0x00 TTL=55 ID=50472 DF PROTO=TCP SPT=44202 DPT=25 WINDOW=7300 RES=0x00 SYN URGP=0 
...

Feb 19 03:39:58 datentool sshd[3767]: Invalid user cpanel from 131.221.32.82
Feb 19 03:39:58 datentool sshd[3767]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=131.221.32.82 
Feb 19 03:40:00 datentool sshd[3767]: Failed password for invalid user cpanel from 131.221.32.82 port 37642 ssh2
Feb 19 03:43:42 datentool sshd[3805]: Invalid user tomcat from 131.221.32.82
Feb 19 03:43:42 datentool sshd[3805]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=131.221.32.82 
Feb 19 03:43:44 datentool sshd[3805]: Failed password for invalid user tomcat from 131.221.32.82 port 35568 ssh2
Feb 19 03:44:44 datentool sshd[3808]: Invalid user adminixxxr from 131.221.32.82
Feb 19 03:44:44 datentool sshd[3808]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=131.221.32.82 
Feb 19 03:44:46 datentool sshd[3808]: Failed password for invalid user adminixxxr from 131.221.32.82........
-------------------------------

Port probing on unauthorized port 23

failed_logins

by Amazon Technologies Inc.

Feb 21 13:41:24 gw1 sshd[27533]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=186.121.247.82
Feb 21 13:41:26 gw1 sshd[27533]: Failed password for invalid user Ronald from 186.121.247.82 port 57801 ssh2
...