SSH authentication failure x 6 reported by Fail2Ban
...

Jun 28 15:24:39 itv-usvr-01 sshd[22838]: Invalid user gun from 66.70.130.148
Jun 28 15:24:39 itv-usvr-01 sshd[22838]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=66.70.130.148
Jun 28 15:24:39 itv-usvr-01 sshd[22838]: Invalid user gun from 66.70.130.148
Jun 28 15:24:41 itv-usvr-01 sshd[22838]: Failed password for invalid user gun from 66.70.130.148 port 39074 ssh2
Jun 28 15:27:36 itv-usvr-01 sshd[22955]: Invalid user admin from 66.70.130.148

Jun 28 07:04:08 ovpn sshd\[7428\]: Invalid user jeanmarc from 118.89.48.155
Jun 28 07:04:08 ovpn sshd\[7428\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=118.89.48.155
Jun 28 07:04:10 ovpn sshd\[7428\]: Failed password for invalid user jeanmarc from 118.89.48.155 port 51574 ssh2
Jun 28 07:07:18 ovpn sshd\[7444\]: Invalid user search from 118.89.48.155
Jun 28 07:07:18 ovpn sshd\[7444\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=118.89.48.155

[portscan] tcp/23 [TELNET]
*(RWIN=1398)(06281018)

Jun 28 16:52:01 localhost sshd[32572]: Invalid user emily from 31.46.16.95 port 56470
...

Jun 28 00:06:38 mailman dovecot: imap-login: Disconnected (auth failed, 1 attempts): user=, method=PLAIN, rip=191.53.199.144, lip=[munged], TLS

2019-06-28T11:53:29.981412centos sshd\[20752\]: Invalid user usuario from 142.93.208.158 port 56176
2019-06-28T11:53:29.987575centos sshd\[20752\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=142.93.208.158
2019-06-28T11:53:31.884223centos sshd\[20752\]: Failed password for invalid user usuario from 142.93.208.158 port 56176 ssh2

Jun 28 13:23:50 ubuntu-2gb-nbg1-dc3-1 sshd[12773]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.247.228.75
Jun 28 13:23:52 ubuntu-2gb-nbg1-dc3-1 sshd[12773]: Failed password for invalid user webmaster from 106.247.228.75 port 9448 ssh2
...

Unauthorized connection attempt from IP address 200.205.141.57 on Port 445(SMB)

Jun 24 22:45:55 lvps92-51-164-246 sshd[1521]: Invalid user eli from 51.77.140.244
Jun 24 22:45:57 lvps92-51-164-246 sshd[1521]: Failed password for invalid user eli from 51.77.140.244 port 39546 ssh2
Jun 24 22:45:57 lvps92-51-164-246 sshd[1521]: Received disconnect from 51.77.140.244: 11: Bye Bye [preauth]
Jun 24 22:48:03 lvps92-51-164-246 sshd[1551]: Invalid user margaux from 51.77.140.244
Jun 24 22:48:05 lvps92-51-164-246 sshd[1551]: Failed password for invalid user margaux from 51.77.140.244 port 36834 ssh2
Jun 24 22:48:05 lvps92-51-164-246 sshd[1551]: Received disconnect from 51.77.140.244: 11: Bye Bye [preauth]


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https://www.blocklist.de/en/view.html?ip=51.77.140.244

2019-06-28 06:52:10 H=([5.188.153.205]) [5.188.153.205]:22641 I=[10.100.18.20]:25 sender verify fail for : Unrouteable address
2019-06-28 x@x
2019-06-28 06:52:10 unexpected disconnection while reading SMTP command from ([5.188.153.205]) [5.188.153.205]:22641 I=[10.100.18.20]:25 (error: Connection reset by peer)


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https://www.blocklist.de/en/view.html?ip=5.188.153.205

SMTP/25/465/587-993/995 Probe, Reject, BadAuth, Hack, SPAM -

DATE:2019-06-28_07:07:44, IP:173.249.23.229, PORT:telnet Telnet brute force auth on honeypot server (honey-neo-dc)

2019-06-28T08:38:47.555494centos sshd\[14563\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.113.125.226  user=root
2019-06-28T08:38:50.050673centos sshd\[14563\]: Failed password for root from 180.113.125.226 port 60791 ssh2
2019-06-28T08:38:52.045518centos sshd\[14563\]: Failed password for root from 180.113.125.226 port 60791 ssh2

Unauthorized connection attempt from IP address 83.239.188.186 on Port 445(SMB)