Jul  9 16:04:28 santamaria sshd\[18952\]: Invalid user splunk from 129.146.250.102
Jul  9 16:04:28 santamaria sshd\[18952\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=129.146.250.102
Jul  9 16:04:29 santamaria sshd\[18952\]: Failed password for invalid user splunk from 129.146.250.102 port 49884 ssh2
...

$f2bV_matches

[Thu Jul 09 19:05:00.089471 2020] [:error] [pid 32224:tid 140046008297216] [client 178.162.123.80:34903] [client 178.162.123.80] 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 "103.27.207.197:80"] [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 "XwcH7N-w4PLeR-c0aSH3XwAAAyw"]
...

2020-07-09T20:11:29.693599mail.standpoint.com.ua sshd[19816]: Invalid user lemwal from 116.6.234.141 port 34037
2020-07-09T20:11:29.696138mail.standpoint.com.ua sshd[19816]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=116.6.234.141
2020-07-09T20:11:29.693599mail.standpoint.com.ua sshd[19816]: Invalid user lemwal from 116.6.234.141 port 34037
2020-07-09T20:11:32.510052mail.standpoint.com.ua sshd[19816]: Failed password for invalid user lemwal from 116.6.234.141 port 34037 ssh2
2020-07-09T20:13:54.394438mail.standpoint.com.ua sshd[20141]: Invalid user annemarie from 116.6.234.141 port 34038
...

Jul  9 15:02:03 lukav-desktop sshd\[5831\]: Invalid user test from 118.25.109.46
Jul  9 15:02:03 lukav-desktop sshd\[5831\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=118.25.109.46
Jul  9 15:02:05 lukav-desktop sshd\[5831\]: Failed password for invalid user test from 118.25.109.46 port 49728 ssh2
Jul  9 15:04:53 lukav-desktop sshd\[5883\]: Invalid user wangcl from 118.25.109.46
Jul  9 15:04:53 lukav-desktop sshd\[5883\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=118.25.109.46

Unauthorized access or intrusion attempt detected from Thor banned IP

 TCP (SYN) 216.218.206.88:56211 -> port 21, len 44

Jul  9 10:08:22 vps46666688 sshd[32246]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=120.203.29.78
Jul  9 10:08:25 vps46666688 sshd[32246]: Failed password for invalid user cqp from 120.203.29.78 port 4487 ssh2
...

Jul  9 14:11:54 firewall sshd[25725]: Invalid user clj from 159.65.77.254
Jul  9 14:11:56 firewall sshd[25725]: Failed password for invalid user clj from 159.65.77.254 port 42502 ssh2
Jul  9 14:14:41 firewall sshd[25806]: Invalid user pia from 159.65.77.254
...

Auto Fail2Ban report, multiple SSH login attempts.

2020-07-09T13:03:30.281686beta postfix/smtpd[16166]: NOQUEUE: reject: RCPT from 89-64-56-129.dynamic.chello.pl[89.64.56.129]: 554 5.7.1 : Relay access denied; from= to= proto=ESMTP helo=<89-64-56-129.dynamic.chello.pl>
2020-07-09T13:04:37.114833beta postfix/smtpd[16166]: NOQUEUE: reject: RCPT from 89-64-56-129.dynamic.chello.pl[89.64.56.129]: 554 5.7.1 : Relay access denied; from= to= proto=ESMTP helo=<89-64-56-129.dynamic.chello.pl>
2020-07-09T13:04:58.834304beta postfix/smtpd[16166]: NOQUEUE: reject: RCPT from 89-64-56-129.dynamic.chello.pl[89.64.56.129]: 554 5.7.1 : Relay access denied; from= to= proto=ESMTP helo=<89-64-56-129.dynamic.chello.pl>
...

Jul  9 19:32:51 vps639187 sshd\[24258\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.248  user=root
Jul  9 19:32:53 vps639187 sshd\[24258\]: Failed password for root from 218.92.0.248 port 56371 ssh2
Jul  9 19:32:57 vps639187 sshd\[24258\]: Failed password for root from 218.92.0.248 port 56371 ssh2
...

[2020-07-09 13:19:51] NOTICE[1150][C-000012b7] chan_sip.c: Call from '' (156.96.154.8:52221) to extension '17453011441904911004' rejected because extension not found in context 'public'.
[2020-07-09 13:19:51] SECURITY[1167] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-07-09T13:19:51.707-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="17453011441904911004",SessionID="0x7fcb4c0dfe08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/156.96.154.8/52221",ACLName="no_extension_match"
[2020-07-09 13:20:42] NOTICE[1150][C-000012bb] chan_sip.c: Call from '' (156.96.154.8:58805) to extension '17454011441904911004' rejected because extension not found in context 'public'.
[2020-07-09 13:20:42] SECURITY[1167] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-07-09T13:20:42.779-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="17454011441904911004",SessionID="0x7fcb4c16aa68",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteA
...

Jul  9 12:55:38 mail1 postfix/smtpd[17152]: connect from unknown[183.17.62.123]
Jul  9 12:55:39 mail1 postgrey[697]: action=greylist, reason=new, client_name=unknown, client_address=183.17.62.123, sender=x@x recipient=x@x
Jul  9 12:55:39 mail1 postfix/smtpd[17152]: disconnect from unknown[183.17.62.123] ehlo=1 mail=1 rcpt=0/1 data=0/1 quhostname=1 commands=3/5
Jul  9 12:56:20 mail1 postfix/smtpd[17152]: connect from unknown[183.17.62.123]
Jul  9 12:56:21 mail1 postgrey[697]: action=greylist, reason=new, client_name=unknown, client_address=183.17.62.123, sender=x@x recipient=x@x
Jul  9 12:56:21 mail1 postfix/smtpd[17152]: disconnect from unknown[183.17.62.123] ehlo=1 mail=1 rcpt=0/1 data=0/1 quhostname=1 commands=3/5
Jul  9 12:56:23 mail1 postfix/smtpd[17274]: connect from unknown[183.17.62.123]
Jul  9 12:56:24 mail1 postgrey[697]: action=greylist, reason=new, client_name=unknown, client_address=183.17.62.123, sender=x@x recipient=x@x
Jul  9 12:56:25 mail1 postgrey[697]:........
-------------------------------

Jul  9 19:07:46 db sshd[9214]: Invalid user user from 189.240.225.205 port 38286
...