Jul 14 20:28:26 mellenthin postfix/smtpd[19224]: NOQUEUE: reject: RCPT from unknown[45.179.252.76]: 554 5.7.1 Service unavailable; Client host [45.179.252.76] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/45.179.252.76; from= to= proto=ESMTP helo=<45-179-252-76-proxyar.com>

[Wed Jul 15 01:28:22.702077 2020] [:error] [pid 13074:tid 140254315534080] [client 173.252.95.36:64308] [client 173.252.95.36] ModSecurity: Access denied with code 403 (phase 2). Match of "eq 0" against "&REQUEST_HEADERS:Transfer-Encoding" required. [file "/etc/modsecurity/owasp-modsecurity-crs-3.2.0/rules/REQUEST-920-PROTOCOL-ENFORCEMENT.conf"] [line "202"] [id "920171"] [msg "GET or HEAD Request with Transfer-Encoding."] [data "1"] [severity "CRITICAL"] [ver "OWASP_CRS/3.2.0"] [tag "application-multi"] [tag "language-multi"] [tag "platform-multi"] [tag "attack-protocol"] [tag "OWASP_CRS"] [tag "OWASP_CRS/PROTOCOL_VIOLATION/INVALID_HREQ"] [tag "CAPEC-272"] [hostname "karangploso.jatim.bmkg.go.id"] [uri "/script-v49.js"] [unique_id "Xw35Rp6BljNWiMsO2yWGSwABwwM"]
...

CMS (WordPress or Joomla) login attempt.

1594751321 - 07/14/2020 20:28:41 Host: 187.11.237.244/187.11.237.244 Port: 445 TCP Blocked

TCP port 8088: Scan and connection

2020-07-14T18:25:27.200221shield sshd\[392\]: Invalid user xuyuanchao from 128.199.254.89 port 51554
2020-07-14T18:25:27.208969shield sshd\[392\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=128.199.254.89
2020-07-14T18:25:29.021624shield sshd\[392\]: Failed password for invalid user xuyuanchao from 128.199.254.89 port 51554 ssh2
2020-07-14T18:28:38.234165shield sshd\[1372\]: Invalid user maggiori from 128.199.254.89 port 47914
2020-07-14T18:28:38.242831shield sshd\[1372\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=128.199.254.89

2020-07-14T12:32:40.543862linuxbox-skyline auth[970891]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=technik rhost=141.98.10.208
...

Jul 14 18:28:34 onepixel sshd[1222870]: Invalid user akhil from 178.128.52.226 port 42236
Jul 14 18:28:34 onepixel sshd[1222870]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.128.52.226 
Jul 14 18:28:34 onepixel sshd[1222870]: Invalid user akhil from 178.128.52.226 port 42236
Jul 14 18:28:36 onepixel sshd[1222870]: Failed password for invalid user akhil from 178.128.52.226 port 42236 ssh2
Jul 14 18:29:45 onepixel sshd[1223456]: Invalid user dai from 178.128.52.226 port 58462

Jul 14 18:31:13 web8 sshd\[28831\]: Invalid user xxx from 157.245.183.12
Jul 14 18:31:13 web8 sshd\[28831\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=157.245.183.12
Jul 14 18:31:15 web8 sshd\[28831\]: Failed password for invalid user xxx from 157.245.183.12 port 48188 ssh2
Jul 14 18:36:29 web8 sshd\[31410\]: Invalid user oleg from 157.245.183.12
Jul 14 18:36:29 web8 sshd\[31410\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=157.245.183.12

"Unauthorized connection attempt on SSHD detected"

Unauthorised connection attempt detected at AUO FR1 NODE2. System is sshd. Protected by AUO Stack Web Application Firewall (WAF)

Jul 14 08:25:55 wbs sshd\[6694\]: Invalid user suri from 46.101.11.213
Jul 14 08:25:55 wbs sshd\[6694\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.101.11.213
Jul 14 08:25:57 wbs sshd\[6694\]: Failed password for invalid user suri from 46.101.11.213 port 46704 ssh2
Jul 14 08:28:40 wbs sshd\[6936\]: Invalid user francis from 46.101.11.213
Jul 14 08:28:40 wbs sshd\[6936\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.101.11.213

malicious Brute-Force reported by https://www.patrick-binder.de
...

2020-07-14 18:32:27 auth_plain authenticator failed for (User) [185.143.73.203]: 535 Incorrect authentication data (set_id=patrimonio@mail.csmailer.org)
2020-07-14 18:32:52 auth_plain authenticator failed for (User) [185.143.73.203]: 535 Incorrect authentication data (set_id=aris@mail.csmailer.org)
2020-07-14 18:33:15 auth_plain authenticator failed for (User) [185.143.73.203]: 535 Incorrect authentication data (set_id=rosalinda@mail.csmailer.org)
2020-07-14 18:33:38 auth_plain authenticator failed for (User) [185.143.73.203]: 535 Incorrect authentication data (set_id=md-87@mail.csmailer.org)
2020-07-14 18:34:01 auth_plain authenticator failed for (User) [185.143.73.203]: 535 Incorrect authentication data (set_id=journalists@mail.csmailer.org)
...

Automatic report - Port Scan Attack