Oct  6 10:22:16 meumeu sshd[14457]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=84.170.104.157 
Oct  6 10:22:18 meumeu sshd[14457]: Failed password for invalid user Juliette1@3 from 84.170.104.157 port 19827 ssh2
Oct  6 10:26:13 meumeu sshd[15014]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=84.170.104.157 
...

Oct  6 11:01:00 fr01 sshd[17733]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.175.216  user=root
Oct  6 11:01:02 fr01 sshd[17733]: Failed password for root from 222.186.175.216 port 19534 ssh2
...

scan r

2019-10-06T07:47:04.349637tmaserv sshd\[25439\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.ip-51-75-163.eu
2019-10-06T07:47:06.541004tmaserv sshd\[25439\]: Failed password for invalid user Server@12345 from 51.75.163.218 port 57566 ssh2
2019-10-06T08:00:40.637528tmaserv sshd\[25954\]: Invalid user Apple123 from 51.75.163.218 port 40788
2019-10-06T08:00:40.641771tmaserv sshd\[25954\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.ip-51-75-163.eu
2019-10-06T08:00:42.516978tmaserv sshd\[25954\]: Failed password for invalid user Apple123 from 51.75.163.218 port 40788 ssh2
2019-10-06T08:04:04.681385tmaserv sshd\[26165\]: Invalid user Citibank@123 from 51.75.163.218 port 50712
...

2019-10-06T05:50:22.161566abusebot-5.cloudsearch.cf sshd\[7437\]: Invalid user arma2 from 103.233.76.254 port 40780

10/06/2019-03:48:33.565271 185.175.93.78 Protocol: 6 ET DROP Dshield Block Listed Source group 1

www.xn--netzfundstckderwoche-yec.de 81.93.18.53 \[06/Oct/2019:05:47:50 +0200\] "POST /wp-login.php HTTP/1.1" 200 5659 "-" "Mozilla/5.0 \(X11\; Ubuntu\; Linux x86_64\; rv:62.0\) Gecko/20100101 Firefox/62.0"
www.xn--netzfundstckderwoche-yec.de 81.93.18.53 \[06/Oct/2019:05:47:50 +0200\] "POST /xmlrpc.php HTTP/1.1" 200 4093 "-" "Mozilla/5.0 \(X11\; Ubuntu\; Linux x86_64\; rv:62.0\) Gecko/20100101 Firefox/62.0"

Oct  6 07:56:33 icinga sshd[17880]: Failed password for root from 121.15.140.178 port 42830 ssh2
...

2019-10-06T09:26:43.281259tmaserv sshd\[30475\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=220.120.106.254  user=root
2019-10-06T09:26:44.902003tmaserv sshd\[30475\]: Failed password for root from 220.120.106.254 port 39428 ssh2
2019-10-06T09:31:03.744391tmaserv sshd\[30555\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=220.120.106.254  user=root
2019-10-06T09:31:06.057974tmaserv sshd\[30555\]: Failed password for root from 220.120.106.254 port 53136 ssh2
2019-10-06T09:35:24.097833tmaserv sshd\[30745\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=220.120.106.254  user=root
2019-10-06T09:35:25.910249tmaserv sshd\[30745\]: Failed password for root from 220.120.106.254 port 38644 ssh2
...

Unauthorised access (Oct  6) SRC=209.91.230.56 LEN=52 TTL=111 ID=18950 DF TCP DPT=445 WINDOW=8192 SYN

Oct  6 10:46:04 vps647732 sshd[4345]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=193.70.40.191
Oct  6 10:46:06 vps647732 sshd[4345]: Failed password for invalid user jocelyn from 193.70.40.191 port 54224 ssh2
...

Email spam. Multiple attempts to send e-mail from invalid/unknown sender domain.
Date: 2019 Oct 06. 05:34:55
Source IP: 103.221.254.73

Portion of the log(s):
Oct 6 05:34:55 vserv postfix/smtpd[22964]: NOQUEUE: reject: RCPT from unknown[103.221.254.73]: 450 4.1.8 : Sender address rejected: Domain not found; from= to=<28@[removed].at> proto=ESMTP helo=<10.com>
Oct 6 05:34:54 vserv postfix/smtpd[22964]: NOQUEUE: reject: RCPT from unknown[103.221.254.73]: 450 4.1.8 : Sender address rejected: Domain not found; from= to=<27@[removed].at> proto=ESMTP helo=<10.com>
Oct 6 05:34:53 vserv postfix/smtpd[22964]: NOQUEUE: reject: RCPT from unknown[103.221.254.73]: 450 4.1.8 : Sender address rejected: Domain not found; from= to=<26@[removed].at> proto=ESMTP helo=<10.com>
Oct 6 05:34:52 vserv postfix/smtpd[22964]: NOQUEUE: reject: RCPT from ....

Oct  5 23:47:54 Tower sshd[32398]: Connection from 58.199.164.240 port 50140 on 192.168.10.220 port 22
Oct  5 23:47:55 Tower sshd[32398]: Invalid user pn from 58.199.164.240 port 50140
Oct  5 23:47:55 Tower sshd[32398]: error: Could not get shadow information for NOUSER
Oct  5 23:47:55 Tower sshd[32398]: Failed password for invalid user pn from 58.199.164.240 port 50140 ssh2
Oct  5 23:47:56 Tower sshd[32398]: Received disconnect from 58.199.164.240 port 50140:11: Bye Bye [preauth]
Oct  5 23:47:56 Tower sshd[32398]: Disconnected from invalid user pn 58.199.164.240 port 50140 [preauth]

2019-10-06T10:15:17.785203  sshd[22359]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=58.211.166.170  user=root
2019-10-06T10:15:19.667169  sshd[22359]: Failed password for root from 58.211.166.170 port 55138 ssh2
2019-10-06T10:31:35.537372  sshd[22545]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=58.211.166.170  user=root
2019-10-06T10:31:37.680459  sshd[22545]: Failed password for root from 58.211.166.170 port 32968 ssh2
2019-10-06T10:35:52.284019  sshd[22650]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=58.211.166.170  user=root
2019-10-06T10:35:53.709373  sshd[22650]: Failed password for root from 58.211.166.170 port 42584 ssh2
...

Automatic report - Banned IP Access