[Fri Mar 20 23:27:32.054333 2020] [:error] [pid 2164:tid 140147611977472] [client 141.8.142.23:54455] [client 141.8.142.23] 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 "/"] [unique_id "XnTu9C4o2dgKA24HFuSq9wAAAFo"]
...

[Fri Mar 13 14:57:50.528730 2020] [:error] [pid 5879:tid 140671184795392] [client 141.8.142.23:53161] [client 141.8.142.23] 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 "/"] [unique_id "Xms8-rQ-QnNgbfQs7748mwAAAHI"]
...

(mod_security) mod_security (id:210740) triggered by 141.8.142.8 (RU/Russia/141-8-142-8.spider.yandex.com): 5 in the last 3600 secs

[Sun Mar 22 20:00:03.538358 2020] [:error] [pid 21603:tid 139727231514368] [client 141.8.142.157:57267] [client 141.8.142.157] 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 "/"] [unique_id "XndhUxnFXGtPZGixMNxsoAAAAh0"]
...

[Sat Mar 21 01:25:43.610942 2020] [:error] [pid 3790:tid 140719589320448] [client 141.8.142.60:65179] [client 141.8.142.60] 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 "/"] [unique_id "XnUKpwSfYaBx8kyzBrm2LwAAALQ"]
...

[Thu Mar 19 01:09:39.567987 2020] [:error] [pid 21327:tid 139998034278144] [client 141.8.142.180:58741] [client 141.8.142.180] 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 "/"] [unique_id "XnJj46fks8iqMveAsGOWFwAAAAI"]
...

[Wed Mar 18 11:55:50.619904 2020] [:error] [pid 7238:tid 139937919776512] [client 141.8.142.172:54795] [client 141.8.142.172] 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 "/"] [unique_id "XnGp1mRgp26zVn0yQ0hUowAAAOA"]
...

[Wed Mar 18 11:40:02.820155 2020] [:error] [pid 7238:tid 139937936561920] [client 141.8.142.1:63313] [client 141.8.142.1] 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 "/"] [unique_id "XnGmImRgp26zVn0yQ0hLKQAAAN4"]
...

RU - 1H : (182)  Protection Against DDoS WordPress plugin :  
 "odzyskiwanie danych help-dysk" 
 IP Address Ranges by Country : RU 
 NAME ASN : ASN13238 
 
 IP : 141.8.142.7 
 
 CIDR : 141.8.128.0/20 
 
 PREFIX COUNT : 118 
 
 UNIQUE IP COUNT : 206080 
 
 
 WYKRYTE ATAKI Z ASN13238 :  
  1H - 3 
  3H - 3 
  6H - 3 
 12H - 5 
 24H - 12 
 
 INFO : Looking for resource vulnerabilities 403 Detected and Blocked by ADMIN  - data recovery 
  https://help-dysk.pl

Jul 10 19:01:54   TCP Attack: SRC=141.8.142.155 DST=[Masked] LEN=258 TOS=0x08 PREC=0x20 TTL=44  DF PROTO=TCP SPT=49399 DPT=80 WINDOW=111 RES=0x00 ACK PSH URGP=0

看样子是yandex搜索引擎的可用性爬虫
141.8.142.176 - - [17/May/2019:17:29:40 +0800] "GET /check-ip/2804:14d:5a83:449f:5ab:f26:15e4:e7ce HTTP/1.1" 200 7939 "-" "Mozilla/5.0 (compatible; YandexAccessibilityBot/3.0; +http://yandex.com/bots)"

Sep  7 07:12:13 auw2 sshd\[17202\]: Invalid user web5 from 145.239.10.217
Sep  7 07:12:13 auw2 sshd\[17202\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=ns3088253.ip-145-239-10.eu
Sep  7 07:12:14 auw2 sshd\[17202\]: Failed password for invalid user web5 from 145.239.10.217 port 33986 ssh2
Sep  7 07:16:33 auw2 sshd\[17563\]: Invalid user admin from 145.239.10.217
Sep  7 07:16:33 auw2 sshd\[17563\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=ns3088253.ip-145-239-10.eu

Sep  7 17:41:20 eventyay sshd[6126]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=140.143.199.89
Sep  7 17:41:22 eventyay sshd[6126]: Failed password for invalid user guest3 from 140.143.199.89 port 50438 ssh2
Sep  7 17:47:10 eventyay sshd[6239]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=140.143.199.89
...

Sep  7 09:00:44 auw2 sshd\[26326\]: Invalid user ubuntu from 5.3.6.82
Sep  7 09:00:44 auw2 sshd\[26326\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.3.6.82
Sep  7 09:00:46 auw2 sshd\[26326\]: Failed password for invalid user ubuntu from 5.3.6.82 port 47354 ssh2
Sep  7 09:04:46 auw2 sshd\[26658\]: Invalid user ubuntu from 5.3.6.82
Sep  7 09:04:46 auw2 sshd\[26658\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.3.6.82

'Fail2Ban'

SSH bruteforce

2019-09-07 11:35:00 H=([193.32.160.142]) [193.32.160.140]:8812 I=[192.147.25.65]:25 F= rejected RCPT : RBL: found in thrukfz5b56tq6xao6odgdyjrq.zen.dq.spamhaus.net (127.0.0.3) (https://www.spamhaus.org/sbl/query/SBLCSS)
2019-09-07 11:35:00 H=([193.32.160.142]) [193.32.160.140]:8812 I=[192.147.25.65]:25 F= rejected RCPT : RBL: found in thrukfz5b56tq6xao6odgdyjrq.zen.dq.spamhaus.net (127.0.0.3) (https://www.spamhaus.org/sbl/query/SBLCSS)
2019-09-07 11:35:00 H=([193.32.160.142]) [193.32.160.140]:8812 I=[192.147.25.65]:25 F= rejected RCPT : RBL: found in thrukfz5b56tq6xao6odgdyjrq.zen.dq.spamhaus.net (127.0.0.3) (https://www.spamhaus.org/sbl/query/SBLCSS)
2019-09-07 11:35:00 H=([193.32.160.142]) [193.32.160.140]:8812 I=[192.147.25.65]:25 F= rejected RCPT 

Sep  7 18:47:36 vps691689 sshd[13585]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.180.15.134
Sep  7 18:47:39 vps691689 sshd[13585]: Failed password for invalid user webmo from 46.180.15.134 port 44662 ssh2
Sep  7 18:54:13 vps691689 sshd[13663]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.180.15.134
...

Sep  7 08:57:56 web1 sshd\[14094\]: Invalid user ftpuser from 182.61.27.149
Sep  7 08:57:56 web1 sshd\[14094\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.61.27.149
Sep  7 08:57:59 web1 sshd\[14094\]: Failed password for invalid user ftpuser from 182.61.27.149 port 50708 ssh2
Sep  7 09:03:04 web1 sshd\[14567\]: Invalid user odoo from 182.61.27.149
Sep  7 09:03:04 web1 sshd\[14567\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.61.27.149

$f2bV_matches

@LucianNitescu Personal Honeypot Network <<<>>> Donate at paypal.me/LNitescu <<<>>> 2019-09-07 10:06:56,917 INFO [amun_request_handler] PortScan Detected on Port: 445 (119.235.48.42)

SSH Brute Force

SSH Brute Force, server-1 sshd[6490]: Failed password for invalid user test2 from 51.38.234.54 port 58140 ssh2

" "

Sep  7 13:51:00 microserver sshd[35353]: Invalid user admin from 139.59.247.114 port 45230
Sep  7 13:51:00 microserver sshd[35353]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.247.114
Sep  7 13:51:02 microserver sshd[35353]: Failed password for invalid user admin from 139.59.247.114 port 45230 ssh2
Sep  7 13:56:08 microserver sshd[36035]: Invalid user admin from 139.59.247.114 port 60970
Sep  7 13:56:08 microserver sshd[36035]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.247.114
Sep  7 14:06:24 microserver sshd[37471]: Invalid user www from 139.59.247.114 port 35974
Sep  7 14:06:24 microserver sshd[37471]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.247.114
Sep  7 14:06:25 microserver sshd[37471]: Failed password for invalid user www from 139.59.247.114 port 35974 ssh2
Sep  7 14:11:35 microserver sshd[38170]: Invalid user student1 from 139.59.247.114 port 517

Unauthorized connection attempt from IP address 193.124.184.124 on Port 445(SMB)