$f2bV_matches

[Thu Jun 04 19:04:20.551582 2020] [:error] [pid 27765:tid 140479450683136] [client 91.106.137.69:38397] [client 91.106.137.69] ModSecurity: Access denied with code 403 (phase 2). Pattern match "^[\\\\d.:]+$" at REQUEST_HEADERS:Host. [file "/etc/modsecurity/owasp-modsecurity-crs-3.2.0/rules/REQUEST-920-PROTOCOL-ENFORCEMENT.conf"] [line "696"] [id "920350"] [msg "Host header is a numeric IP address"] [data "103.27.207.197"] [severity "WARNING"] [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/IP_HOST"] [tag "WASCTC/WASC-21"] [tag "OWASP_TOP_10/A7"] [tag "PCI/6.5.10"] [hostname "103.27.207.197"] [uri "/phpmyadmin/"] [unique_id "XtjjRGrt5B@yVHdW6pSrqAAAALQ"]
...

Jun  4 13:58:31 abendstille sshd\[22267\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=134.175.129.58  user=root
Jun  4 13:58:32 abendstille sshd\[22267\]: Failed password for root from 134.175.129.58 port 17263 ssh2
Jun  4 14:01:41 abendstille sshd\[25549\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=134.175.129.58  user=root
Jun  4 14:01:43 abendstille sshd\[25549\]: Failed password for root from 134.175.129.58 port 60655 ssh2
Jun  4 14:04:44 abendstille sshd\[28303\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=134.175.129.58  user=root
...

2020-06-04T09:10:03.386850server.mjenks.net sshd[3244859]: Failed password for root from 165.227.69.39 port 57654 ssh2
2020-06-04T09:12:18.030141server.mjenks.net sshd[3245104]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.227.69.39  user=root
2020-06-04T09:12:19.384405server.mjenks.net sshd[3245104]: Failed password for root from 165.227.69.39 port 41161 ssh2
2020-06-04T09:14:30.837084server.mjenks.net sshd[3245394]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.227.69.39  user=root
2020-06-04T09:14:32.647725server.mjenks.net sshd[3245394]: Failed password for root from 165.227.69.39 port 52937 ssh2
...

Helo

Jun  4 14:16:49 abendstille sshd\[7338\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.215.226.143  user=root
Jun  4 14:16:51 abendstille sshd\[7338\]: Failed password for root from 180.215.226.143 port 41456 ssh2
Jun  4 14:20:52 abendstille sshd\[11924\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.215.226.143  user=root
Jun  4 14:20:53 abendstille sshd\[11924\]: Failed password for root from 180.215.226.143 port 41568 ssh2
Jun  4 14:24:40 abendstille sshd\[15647\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.215.226.143  user=root
...

SSH bruteforce

Jun  4 18:30:19 mail.srvfarm.net postfix/smtpd[2613702]: NOQUEUE: reject: RCPT from unknown[113.88.144.102]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=SMTP helo=
Jun  4 18:30:20 mail.srvfarm.net postfix/smtpd[2613702]: lost connection after RCPT from unknown[113.88.144.102]
Jun  4 18:30:20 mail.srvfarm.net postfix/smtpd[2613724]: NOQUEUE: reject: RCPT from unknown[113.88.144.102]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=SMTP helo=
Jun  4 18:30:20 mail.srvfarm.net postfix/smtpd[2613724]: lost connection after RCPT from unknown[113.88.144.102]
Jun  4 18:30:57 mail.srvfarm.net postfix/smtpd[2613975]: NOQUEUE: reject: RCPT from unknown[113.88.144.102]: 450 4.1.8 : Sender address rejected: Domain not found; from= to=

Automatic report - Port Scan Attack

Jun  4 14:01:23 web01 sshd[3514]: Failed password for root from 61.182.232.38 port 56710 ssh2
...

Jun  4 14:50:07 server5 sshd[24818]: User admin from 192.140.102.232 not allowed because not listed in AllowUsers
Jun  4 14:50:07 server5 sshd[24818]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.140.102.232  user=admin
Jun  4 14:50:10 server5 sshd[24818]: Failed password for invalid user admin from 192.140.102.232 port 40031 ssh2
Jun  4 14:50:10 server5 sshd[24818]: Connection closed by 192.140.102.232 port 40031 [preauth]


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=192.140.102.232

157.245.240.102 - - [04/Jun/2020:13:04:42 +0100] "POST /wp-login.php HTTP/1.1" 200 2046 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
157.245.240.102 - - [04/Jun/2020:13:04:48 +0100] "POST /wp-login.php HTTP/1.1" 200 2020 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
157.245.240.102 - - [04/Jun/2020:13:04:51 +0100] "POST /wp-login.php HTTP/1.1" 200 2019 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
...

Jun  4 15:43:42 home sshd[23571]: Failed password for root from 144.217.89.55 port 50138 ssh2
Jun  4 15:47:20 home sshd[23924]: Failed password for root from 144.217.89.55 port 53728 ssh2
...

Jun  4 12:22:11 mx sshd[6504]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=190.80.50.73
Jun  4 12:22:13 mx sshd[6504]: Failed password for invalid user admin from 190.80.50.73 port 15296 ssh2

Jun  4 18:47:13 mail postfix/smtpd\[31214\]: warning: unknown\[193.56.28.176\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Jun  4 18:47:19 mail postfix/smtpd\[31214\]: warning: unknown\[193.56.28.176\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Jun  4 18:47:29 mail postfix/smtpd\[31214\]: warning: unknown\[193.56.28.176\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
Jun  4 18:47:39 mail postfix/smtpd\[31214\]: warning: unknown\[193.56.28.176\]: SASL LOGIN authentication failed: Connection lost to authentication server\