Lines containing failures of 129.226.67.136
Nov 21 03:56:37 mellenthin sshd[14293]: User nobody from 129.226.67.136 not allowed because not listed in AllowUsers
Nov 21 03:56:37 mellenthin sshd[14293]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=129.226.67.136  user=nobody
Nov 21 03:56:39 mellenthin sshd[14293]: Failed password for invalid user nobody from 129.226.67.136 port 56440 ssh2
Nov 21 03:56:40 mellenthin sshd[14293]: Received disconnect from 129.226.67.136 port 56440:11: Bye Bye [preauth]
Nov 21 03:56:40 mellenthin sshd[14293]: Disconnected from invalid user nobody 129.226.67.136 port 56440 [preauth]
Nov 21 04:05:41 mellenthin sshd[14356]: User r.r from 129.226.67.136 not allowed because not listed in AllowUsers
Nov 21 04:05:41 mellenthin sshd[14356]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=129.226.67.136  user=r.r


........
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https://www.blocklist.de/en/view.html?

2019-11-24T07:29:03.995982stark.klein-stark.info sshd\[21875\]: Invalid user webmaster from 42.116.255.216 port 53692
2019-11-24T07:29:04.004976stark.klein-stark.info sshd\[21875\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=42.116.255.216
2019-11-24T07:29:05.860968stark.klein-stark.info sshd\[21875\]: Failed password for invalid user webmaster from 42.116.255.216 port 53692 ssh2
...

Automatic report - Port Scan Attack

" "

Nov 24 07:21:02 meumeu sshd[17635]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.15.36.177 
Nov 24 07:21:04 meumeu sshd[17635]: Failed password for invalid user hata from 194.15.36.177 port 35214 ssh2
Nov 24 07:29:56 meumeu sshd[18589]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=194.15.36.177 
...

2019-11-24T06:29:41.865163abusebot-4.cloudsearch.cf sshd\[12985\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=136.228.160.206  user=root

51.83.69.99 - - [24/Nov/2019:10:29:40 +0400] "POST /GponForm/diag_Form?style/ HTTP/1.1" 502 157 "-" "curl/7.3.2"
...

SSH Brute-Force reported by Fail2Ban

Nov 23 07:10:30 sshd[593]: Connection from 80.211.9.57 port 56544
Nov 23 07:10:31 sshd[593]: Invalid user cron from 80.211.9.57 port 56544
Nov 23 07:10:31 sshd[593]: Received disconnect from 80.211.9.57 port 56544:11: Normal Shutdown, Thank you for playing [preauth]
Nov 23 07:10:31 sshd[593]: Disconnected from invalid user cron 80.211.9.57 port 56544 [preauth]

\[2019-11-24 01:49:34\] NOTICE\[2754\] chan_sip.c: Registration from '"560" \' failed for '45.143.221.15:5396' - Wrong password
\[2019-11-24 01:49:34\] SECURITY\[2765\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-11-24T01:49:34.686-0500",Severity="Error",Service="SIP",EventVersion="2",AccountID="560",SessionID="0x7f26c4b7dbd8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/45.143.221.15/5396",Challenge="0bcdcf02",ReceivedChallenge="0bcdcf02",ReceivedHash="f91013ba058efdcb2df8232890834e3c"
\[2019-11-24 01:49:34\] NOTICE\[2754\] chan_sip.c: Registration from '"560" \' failed for '45.143.221.15:5396' - Wrong password
\[2019-11-24 01:49:34\] SECURITY\[2765\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-11-24T01:49:34.814-0500",Severity="Error",Service="SIP",EventVersion="2",AccountID="560",SessionID="0x7f26c47c51a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/45.1

Nov 23 21:02:41 eddieflores sshd\[28566\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.190.92  user=root
Nov 23 21:02:43 eddieflores sshd\[28566\]: Failed password for root from 222.186.190.92 port 1288 ssh2
Nov 23 21:03:09 eddieflores sshd\[28606\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.190.92  user=root
Nov 23 21:03:11 eddieflores sshd\[28606\]: Failed password for root from 222.186.190.92 port 34488 ssh2
Nov 23 21:03:26 eddieflores sshd\[28606\]: Failed password for root from 222.186.190.92 port 34488 ssh2

Nov 24 09:12:54 server sshd\[26487\]: Invalid user redy from 146.185.180.19
Nov 24 09:12:54 server sshd\[26487\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=146.185.180.19 
Nov 24 09:12:57 server sshd\[26487\]: Failed password for invalid user redy from 146.185.180.19 port 41705 ssh2
Nov 24 09:29:42 server sshd\[30420\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=146.185.180.19  user=root
Nov 24 09:29:44 server sshd\[30420\]: Failed password for root from 146.185.180.19 port 52371 ssh2
...

Nov 24 06:23:40 localhost sshd\[21080\]: Invalid user ts3server from 174.138.15.92 port 57892
Nov 24 06:23:40 localhost sshd\[21080\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=174.138.15.92
Nov 24 06:23:42 localhost sshd\[21080\]: Failed password for invalid user ts3server from 174.138.15.92 port 57892 ssh2
Nov 24 06:29:51 localhost sshd\[21347\]: Invalid user goree from 174.138.15.92 port 37398
Nov 24 06:29:51 localhost sshd\[21347\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=174.138.15.92
...

2019-11-24T06:40:02.882934shield sshd\[32038\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.77  user=root
2019-11-24T06:40:04.738511shield sshd\[32038\]: Failed password for root from 49.88.112.77 port 15926 ssh2
2019-11-24T06:40:06.753454shield sshd\[32038\]: Failed password for root from 49.88.112.77 port 15926 ssh2
2019-11-24T06:40:09.043710shield sshd\[32038\]: Failed password for root from 49.88.112.77 port 15926 ssh2
2019-11-24T06:40:37.570120shield sshd\[32173\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.77  user=root

Brute force attempt