Mar 27 04:53:16 santamaria sshd\[18014\]: Invalid user shiba from 51.255.9.160
Mar 27 04:53:16 santamaria sshd\[18014\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.255.9.160
Mar 27 04:53:18 santamaria sshd\[18014\]: Failed password for invalid user shiba from 51.255.9.160 port 49430 ssh2
...

Mar 27 05:04:49 markkoudstaal sshd[25251]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=140.143.127.179
Mar 27 05:04:52 markkoudstaal sshd[25251]: Failed password for invalid user lida from 140.143.127.179 port 50354 ssh2
Mar 27 05:08:41 markkoudstaal sshd[25717]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=140.143.127.179

Mar 27 04:53:24 ks10 sshd[897107]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=162.243.237.90 
Mar 27 04:53:26 ks10 sshd[897107]: Failed password for invalid user zhoumin from 162.243.237.90 port 54505 ssh2
...

Mar 27 06:19:38 vps647732 sshd[4871]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=13.92.102.210
Mar 27 06:19:41 vps647732 sshd[4871]: Failed password for invalid user hippy from 13.92.102.210 port 40996 ssh2
...

2020-03-27 06:27:39 dovecot_login authenticator failed for \(\[78.128.113.72\]\) \[78.128.113.72\]: 535 Incorrect authentication data \(set_id=admina@no-server.de\)
2020-03-27 06:27:46 dovecot_login authenticator failed for \(\[78.128.113.72\]\) \[78.128.113.72\]: 535 Incorrect authentication data
2020-03-27 06:27:54 dovecot_login authenticator failed for \(\[78.128.113.72\]\) \[78.128.113.72\]: 535 Incorrect authentication data
2020-03-27 06:27:59 dovecot_login authenticator failed for \(\[78.128.113.72\]\) \[78.128.113.72\]: 535 Incorrect authentication data
2020-03-27 06:28:11 dovecot_login authenticator failed for \(\[78.128.113.72\]\) \[78.128.113.72\]: 535 Incorrect authentication data
...

Invalid user v from 188.213.175.98 port 56041

Mar 27 05:43:49 silence02 sshd[15176]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.83.46.16
Mar 27 05:43:52 silence02 sshd[15176]: Failed password for invalid user webadmin from 51.83.46.16 port 40476 ssh2
Mar 27 05:45:47 silence02 sshd[15265]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.83.46.16

Mar 27 05:42:05 mail.srvfarm.net postfix/smtpd[3723724]: NOQUEUE: reject: RCPT from unknown[134.73.51.153]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=ESMTP helo=
Mar 27 05:42:05 mail.srvfarm.net postfix/smtpd[3721876]: NOQUEUE: reject: RCPT from unknown[134.73.51.153]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=ESMTP helo=
Mar 27 05:42:05 mail.srvfarm.net postfix/smtpd[3723721]: NOQUEUE: reject: RCPT from unknown[134.73.51.153]: 450 4.1.8 : Sender address rejected: Domain not found; from= to= proto=ESMTP helo=
Mar 27 05:42:05 mail.srvfarm.net postfix/smtpd[3721944]: NOQUEUE: reject: RCPT from unknown[134.73.51.153]:

[portscan] Port scan

Mar 27 07:01:34 minden010 sshd[11316]: Failed password for root from 222.186.30.167 port 55850 ssh2
Mar 27 07:01:36 minden010 sshd[11316]: Failed password for root from 222.186.30.167 port 55850 ssh2
Mar 27 07:01:39 minden010 sshd[11316]: Failed password for root from 222.186.30.167 port 55850 ssh2
...

Invalid user oracle from 189.254.33.157 port 35557

$f2bV_matches

Mar 27 04:46:46 mail.srvfarm.net postfix/smtpd[3702190]: NOQUEUE: reject: RCPT from 50-196-126-233-static.hfc.comcastbusiness.net[50.196.126.233]: 554 5.7.1 Service unavailable; Client host [50.196.126.233] blocked using bl.spamcop.net; Blocked - see https://www.spamcop.net/bl.shtml?50.196.126.233; from= to= proto=ESMTP helo=<50-196-126-233-static.hfc.comcastbusiness.net>
Mar 27 04:46:46 mail.srvfarm.net postfix/smtpd[3702190]: NOQUEUE: reject: RCPT from 50-196-126-233-static.hfc.comcastbusiness.net[50.196.126.233]: 554 5.7.1 Service unavailable; Client host [50.196.126.233] blocked using bl.spamcop.net; Blocked - see https://www.spamcop.net/bl.shtml?50.196.126.233; from= to= proto=ESMTP helo=<50-196-126-233-static.hfc.comcastbusiness.net>
Mar 27 04:46:47 mail.srvfarm.net postfix/smtpd[3702190]: NOQUEUE: reject: RCPT from 50-196-126-233-static.hfc.comcastbusiness.net[50.196.126.233]: 554

Mar 27 06:28:00 srv01 postfix/smtpd\[24868\]: warning: unknown\[46.38.145.4\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 27 06:28:29 srv01 postfix/smtpd\[24868\]: warning: unknown\[46.38.145.4\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 27 06:29:01 srv01 postfix/smtpd\[30345\]: warning: unknown\[46.38.145.4\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 27 06:29:30 srv01 postfix/smtpd\[7853\]: warning: unknown\[46.38.145.4\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Mar 27 06:30:00 srv01 postfix/smtpd\[24868\]: warning: unknown\[46.38.145.4\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

[2020-03-26 23:43:10] NOTICE[1148][C-00017559] chan_sip.c: Call from '' (185.53.88.49:5077) to extension '1011972595778361' rejected because extension not found in context 'public'.
[2020-03-26 23:43:10] SECURITY[1163] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-03-26T23:43:10.140-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="1011972595778361",SessionID="0x7fd82c43c848",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.53.88.49/5077",ACLName="no_extension_match"
[2020-03-26 23:53:05] NOTICE[1148][C-00017562] chan_sip.c: Call from '' (185.53.88.49:5079) to extension '7011972595778361' rejected because extension not found in context 'public'.
[2020-03-26 23:53:05] SECURITY[1163] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-03-26T23:53:05.501-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="7011972595778361",SessionID="0x7fd82c530768",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/18
...