Jul 16 06:29:26 blackbee postfix/smtpd[22434]: warning: unknown[185.143.73.171]: SASL LOGIN authentication failed: authentication failure
Jul 16 06:29:53 blackbee postfix/smtpd[22273]: warning: unknown[185.143.73.171]: SASL LOGIN authentication failed: authentication failure
Jul 16 06:30:20 blackbee postfix/smtpd[22273]: warning: unknown[185.143.73.171]: SASL LOGIN authentication failed: authentication failure
Jul 16 06:30:47 blackbee postfix/smtpd[22273]: warning: unknown[185.143.73.171]: SASL LOGIN authentication failed: authentication failure
Jul 16 06:31:13 blackbee postfix/smtpd[22273]: warning: unknown[185.143.73.171]: SASL LOGIN authentication failed: authentication failure
...

2020-07-16 01:15:21.255279-0500  localhost sshd[56003]: Failed password for root from 104.42.11.121 port 64407 ssh2

 TCP (SYN) 1.34.118.219:41267 -> port 80, len 44

Invalid user admin from 222.186.171.247 port 49246

fail2ban

(From syme.chara@googlemail.com) Hi,

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Jul 16 05:38:07 roki-contabo sshd\[24248\]: Invalid user zhicheng from 182.61.105.146
Jul 16 05:38:07 roki-contabo sshd\[24248\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.61.105.146
Jul 16 05:38:09 roki-contabo sshd\[24248\]: Failed password for invalid user zhicheng from 182.61.105.146 port 50268 ssh2
Jul 16 06:03:15 roki-contabo sshd\[24464\]: Invalid user plex from 182.61.105.146
Jul 16 06:03:15 roki-contabo sshd\[24464\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.61.105.146
...

Invalid user code from 51.75.16.138 port 42701

\[Jul 16 15:14:22\] NOTICE\[31025\] chan_sip.c: Registration from '"404" \' failed for '103.145.12.176:5154' - Wrong password
\[Jul 16 15:14:22\] NOTICE\[31025\] chan_sip.c: Registration from '"404" \' failed for '103.145.12.176:5154' - Wrong password
\[Jul 16 15:14:22\] NOTICE\[31025\] chan_sip.c: Registration from '"404" \' failed for '103.145.12.176:5154' - Wrong password
\[Jul 16 15:14:22\] NOTICE\[31025\] chan_sip.c: Registration from '"404" \' failed for '103.145.12.176:5154' - Wrong password
\[Jul 16 15:14:22\] NOTICE\[31025\] chan_sip.c: Registration from '"404" \' failed for '103.145.12.176:5154' - Wrong password
\[Jul 16 15:14:22\] NOTICE\[31025\] chan_sip.c: Registration from '"404" \' failed for '103.145.12.176:5154' - Wrong password
\[Jul 16 15:14:22\] NOTICE\[31025\] chan_sip.c: Registration from '"4
...

Jul 15 23:04:29 server1 sshd\[26301\]: Failed password for invalid user liao from 180.101.147.147 port 56416 ssh2
Jul 15 23:08:15 server1 sshd\[27415\]: Invalid user dokku from 180.101.147.147
Jul 15 23:08:15 server1 sshd\[27415\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.101.147.147 
Jul 15 23:08:17 server1 sshd\[27415\]: Failed password for invalid user dokku from 180.101.147.147 port 49991 ssh2
Jul 15 23:12:17 server1 sshd\[28801\]: Invalid user shao from 180.101.147.147
...

Invalid user boon from 108.190.190.48 port 41072

Jul 16 05:51:53 ns37 sshd[26825]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=61.174.60.170
Jul 16 05:51:54 ns37 sshd[26825]: Failed password for invalid user sangeeta from 61.174.60.170 port 58498 ssh2
Jul 16 05:54:06 ns37 sshd[26922]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=61.174.60.170

Brute-force attempt banned

Automatic report - Port Scan

 TCP (SYN) 164.90.212.48:50731 -> port 22, len 44