Jul  8 02:44:03 Tower sshd[6889]: Connection from 85.238.101.190 port 54164 on 192.168.10.220 port 22 rdomain ""
Jul  8 02:44:04 Tower sshd[6889]: Invalid user ansible from 85.238.101.190 port 54164
Jul  8 02:44:04 Tower sshd[6889]: error: Could not get shadow information for NOUSER
Jul  8 02:44:04 Tower sshd[6889]: Failed password for invalid user ansible from 85.238.101.190 port 54164 ssh2
Jul  8 02:44:05 Tower sshd[6889]: Received disconnect from 85.238.101.190 port 54164:11: Bye Bye [preauth]
Jul  8 02:44:05 Tower sshd[6889]: Disconnected from invalid user ansible 85.238.101.190 port 54164 [preauth]

(smtpauth) Failed SMTP AUTH login from 177.21.193.196 (BR/Brazil/177-21-193-196.miragetelecom.com.br): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: 2020-07-08 08:14:21 plain authenticator failed for ([177.21.193.196]) [177.21.193.196]: 535 Incorrect authentication data (set_id=info)

Jul  8 09:39:11 ift sshd\[1244\]: Invalid user david from 165.22.209.138Jul  8 09:39:13 ift sshd\[1244\]: Failed password for invalid user david from 165.22.209.138 port 42658 ssh2Jul  8 09:42:42 ift sshd\[2180\]: Invalid user sheila from 165.22.209.138Jul  8 09:42:44 ift sshd\[2180\]: Failed password for invalid user sheila from 165.22.209.138 port 40480 ssh2Jul  8 09:46:15 ift sshd\[3143\]: Failed password for mail from 165.22.209.138 port 38310 ssh2
...

Jul  8 07:37:15 prox sshd[8919]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=111.229.50.25 
Jul  8 07:37:17 prox sshd[8919]: Failed password for invalid user jean from 111.229.50.25 port 43900 ssh2

sshd jail - ssh hack attempt

2020-07-08T08:28:35.622244galaxy.wi.uni-potsdam.de sshd[1114]: Invalid user abdon from 103.192.179.238 port 39502
2020-07-08T08:28:35.627307galaxy.wi.uni-potsdam.de sshd[1114]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.192.179.238
2020-07-08T08:28:35.622244galaxy.wi.uni-potsdam.de sshd[1114]: Invalid user abdon from 103.192.179.238 port 39502
2020-07-08T08:28:37.352559galaxy.wi.uni-potsdam.de sshd[1114]: Failed password for invalid user abdon from 103.192.179.238 port 39502 ssh2
2020-07-08T08:31:27.978491galaxy.wi.uni-potsdam.de sshd[1441]: Invalid user shanshan from 103.192.179.238 port 53730
2020-07-08T08:31:27.983683galaxy.wi.uni-potsdam.de sshd[1441]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=103.192.179.238
2020-07-08T08:31:27.978491galaxy.wi.uni-potsdam.de sshd[1441]: Invalid user shanshan from 103.192.179.238 port 53730
2020-07-08T08:31:29.322410galaxy.wi.uni-potsdam.de sshd[1441]: Fa
...

$f2bV_matches

Jul  8 05:44:30 vm0 sshd[1398]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=115.159.190.174
Jul  8 05:44:32 vm0 sshd[1398]: Failed password for invalid user avatar from 115.159.190.174 port 40086 ssh2
...

Jul  8 00:34:23 george sshd[15270]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.64.80.135 
Jul  8 00:34:26 george sshd[15270]: Failed password for invalid user sangna from 192.64.80.135 port 31991 ssh2
Jul  8 00:38:14 george sshd[15304]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.64.80.135

2020-07-08T10:35:22.551217hostname sshd[20741]: Invalid user hayasi from 115.159.114.87 port 49816
2020-07-08T10:35:24.866824hostname sshd[20741]: Failed password for invalid user hayasi from 115.159.114.87 port 49816 ssh2
2020-07-08T10:44:30.491696hostname sshd[24732]: Invalid user server from 115.159.114.87 port 35426
...

Jul  8 07:53:54 blackbee postfix/smtpd[5035]: warning: unknown[212.70.149.3]: SASL LOGIN authentication failed: authentication failure
Jul  8 07:54:15 blackbee postfix/smtpd[5035]: warning: unknown[212.70.149.3]: SASL LOGIN authentication failed: authentication failure
Jul  8 07:54:37 blackbee postfix/smtpd[5035]: warning: unknown[212.70.149.3]: SASL LOGIN authentication failed: authentication failure
Jul  8 07:54:57 blackbee postfix/smtpd[5035]: warning: unknown[212.70.149.3]: SASL LOGIN authentication failed: authentication failure
Jul  8 07:55:19 blackbee postfix/smtpd[5035]: warning: unknown[212.70.149.3]: SASL LOGIN authentication failed: authentication failure
...

Jul  8 08:23:39 pve1 sshd[19071]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=223.247.194.43 
Jul  8 08:23:41 pve1 sshd[19071]: Failed password for invalid user write from 223.247.194.43 port 48786 ssh2
...

Jul  7 20:29:44 web1 sshd\[3962\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.234.192.24  user=mail
Jul  7 20:29:47 web1 sshd\[3962\]: Failed password for mail from 49.234.192.24 port 35166 ssh2
Jul  7 20:39:32 web1 sshd\[4836\]: Invalid user minecraft from 49.234.192.24
Jul  7 20:39:32 web1 sshd\[4836\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.234.192.24
Jul  7 20:39:34 web1 sshd\[4836\]: Failed password for invalid user minecraft from 49.234.192.24 port 36680 ssh2

 TCP (SYN) 223.79.173.38:42521 -> port 23, len 44

port scan and connect, tcp 80 (http)