(smtpauth) Failed SMTP AUTH login from 37.49.230.131 (EE/Estonia/-): 5 in the last 3600 secs

Jun 18 17:42:35 relay postfix/smtpd\[20339\]: warning: unknown\[37.49.230.131\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jun 18 17:42:41 relay postfix/smtpd\[18096\]: warning: unknown\[37.49.230.131\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jun 18 17:42:51 relay postfix/smtpd\[26742\]: warning: unknown\[37.49.230.131\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jun 18 17:43:13 relay postfix/smtpd\[26712\]: warning: unknown\[37.49.230.131\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jun 18 17:43:19 relay postfix/smtpd\[18096\]: warning: unknown\[37.49.230.131\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

Jun  8 23:17:31 mail.srvfarm.net postfix/smtpd[1052472]: warning: unknown[37.49.230.131]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jun  8 23:17:31 mail.srvfarm.net postfix/smtpd[1052472]: lost connection after AUTH from unknown[37.49.230.131]
Jun  8 23:17:37 mail.srvfarm.net postfix/smtpd[1068290]: warning: unknown[37.49.230.131]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jun  8 23:17:37 mail.srvfarm.net postfix/smtpd[1068290]: lost connection after AUTH from unknown[37.49.230.131]
Jun  8 23:17:47 mail.srvfarm.net postfix/smtpd[1066616]: warning: unknown[37.49.230.131]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Jun  8 23:17:47 mail.srvfarm.net postfix/smtpd[1066616]: lost connection after AUTH from unknown[37.49.230.131]

May 30 07:01:29 mail postfix/smtpd\[11752\]: warning: unknown\[37.49.230.131\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
May 30 07:01:35 mail postfix/smtpd\[11752\]: warning: unknown\[37.49.230.131\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
May 30 07:01:45 mail postfix/smtpd\[11333\]: warning: unknown\[37.49.230.131\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6\
May 30 07:01:55 mail postfix/smtpd\[11752\]: warning: unknown\[37.49.230.131\]: SASL LOGIN authentication failed: Connection lost to authentication server\

May 14 00:08:38 mail postfix/smtpd[102040]: warning: unknown[37.49.230.131]: SASL LOGIN authentication failed: authentication failure
May 14 00:08:40 mail postfix/smtpd[102040]: warning: unknown[37.49.230.131]: SASL LOGIN authentication failed: authentication failure
May 14 00:08:42 mail postfix/smtpd[102040]: warning: unknown[37.49.230.131]: SASL LOGIN authentication failed: authentication failure
...

2020-04-28 18:27:07 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=admin@ift.org.ua\)2020-04-28 18:27:46 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=noreply@ift.org.ua\)2020-04-28 18:29:10 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=webmaster@ift.org.ua\)
...

2020-04-25 10:00:15 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=ftpuser@ift.org.ua\)2020-04-25 10:00:36 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=copier@ift.org.ua\)2020-04-25 10:02:30 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=test@ift.org.ua\)
...

2020-04-25 02:36:16 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=ipmanagement@ift.org.ua\)2020-04-25 02:36:21 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=postmaster@ift.org.ua\)2020-04-25 02:38:04 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=shipping@ift.org.ua\)
...

2020-04-24 20:17:44 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=webmaster@ift.org.ua\)2020-04-24 20:17:50 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=administrator@ift.org.ua\)2020-04-24 20:19:30 dovecot_login authenticator failed for \(User\) \[37.49.230.131\]: 535 Incorrect authentication data \(set_id=manager@ift.org.ua\)
...

(smtpauth) Failed SMTP AUTH login from 37.49.230.131 (NL/Netherlands/-): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: 2020-04-02 17:09:04 login authenticator failed for (User) [37.49.230.131]: 535 Incorrect authentication data (set_id=test@farasunict.com)

Bible

2020-10-13T06:44:21.356144news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
2020-10-13T06:44:25.395781news0 dovecot[21131]: pop3-login: Aborted login (auth failed, 1 attempts in 4 secs): user=, method=PLAIN, rip=37.49.230.238, lip=95.111.246.42, session=
2020-10-13T06:44:28.401407news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
...

2020-10-13T06:44:21.356144news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
2020-10-13T06:44:25.395781news0 dovecot[21131]: pop3-login: Aborted login (auth failed, 1 attempts in 4 secs): user=, method=PLAIN, rip=37.49.230.238, lip=95.111.246.42, session=
2020-10-13T06:44:28.401407news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
...

Dovecot Invalid User Login Attempt.

"AmooT";tag=3533393765393339313363340132313832313335333935

\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.624+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffea08d88",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="096f171f",ReceivedChallenge="096f171f",ReceivedHash="b099bdfad5869da4ae2114a56a2b4299"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.759+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffeab8148",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="233a417c",ReceivedChallenge="233a417c",ReceivedHash="0017581d14759d4b5ad3a404ed924131"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.783+0200",Severity="Error",Service="SIP",EventVersion="2",Accoun
...

\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.624+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffea08d88",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="096f171f",ReceivedChallenge="096f171f",ReceivedHash="b099bdfad5869da4ae2114a56a2b4299"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.759+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffeab8148",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="233a417c",ReceivedChallenge="233a417c",ReceivedHash="0017581d14759d4b5ad3a404ed924131"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.783+0200",Severity="Error",Service="SIP",EventVersion="2",Accoun
...

[N1.H1.VM1] Port Scanner Detected Blocked by UFW

SIP Server BruteForce Attack

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

Hellooo

Hellooo

Sep 28 15:49:19 : SSH login attempts with invalid user

$f2bV_matches

$f2bV_matches

Invalid user support from 113.53.146.227 port 61831

Invalid user yp from 120.70.100.89 port 51378

2020-04-21T19:47:04.639264abusebot-5.cloudsearch.cf sshd[6471]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=27.100.247.40  user=root
2020-04-21T19:47:06.652404abusebot-5.cloudsearch.cf sshd[6471]: Failed password for root from 27.100.247.40 port 31787 ssh2
2020-04-21T19:52:18.579700abusebot-5.cloudsearch.cf sshd[6529]: Invalid user postgres from 27.100.247.40 port 51288
2020-04-21T19:52:18.592932abusebot-5.cloudsearch.cf sshd[6529]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=27.100.247.40
2020-04-21T19:52:18.579700abusebot-5.cloudsearch.cf sshd[6529]: Invalid user postgres from 27.100.247.40 port 51288
2020-04-21T19:52:20.380045abusebot-5.cloudsearch.cf sshd[6529]: Failed password for invalid user postgres from 27.100.247.40 port 51288 ssh2
2020-04-21T19:56:27.340059abusebot-5.cloudsearch.cf sshd[6580]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=27.100.2
...

2020-04-21T20:02:38.127215shield sshd\[10805\]: Invalid user ri from 43.243.37.227 port 46294
2020-04-21T20:02:38.131446shield sshd\[10805\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=43.243.37.227
2020-04-21T20:02:40.365377shield sshd\[10805\]: Failed password for invalid user ri from 43.243.37.227 port 46294 ssh2
2020-04-21T20:06:40.095199shield sshd\[11227\]: Invalid user ly from 43.243.37.227 port 52946
2020-04-21T20:06:40.099178shield sshd\[11227\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=43.243.37.227

2020-04-21T21:43:46.946971v22018076590370373 sshd[4995]: Failed password for root from 37.187.113.144 port 37526 ssh2
2020-04-21T21:51:12.508236v22018076590370373 sshd[20378]: Invalid user postgres from 37.187.113.144 port 52500
2020-04-21T21:51:12.514818v22018076590370373 sshd[20378]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.187.113.144
2020-04-21T21:51:12.508236v22018076590370373 sshd[20378]: Invalid user postgres from 37.187.113.144 port 52500
2020-04-21T21:51:14.573930v22018076590370373 sshd[20378]: Failed password for invalid user postgres from 37.187.113.144 port 52500 ssh2
...

Lines containing failures of 176.31.61.210
Apr 21 09:31:38 penfold sshd[6851]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=176.31.61.210  user=r.r
Apr 21 09:31:40 penfold sshd[6851]: Failed password for r.r from 176.31.61.210 port 37142 ssh2
Apr 21 09:31:41 penfold sshd[6851]: Received disconnect from 176.31.61.210 port 37142:11: Bye Bye [preauth]
Apr 21 09:31:41 penfold sshd[6851]: Disconnected from authenticating user r.r 176.31.61.210 port 37142 [preauth]
Apr 21 09:41:37 penfold sshd[7752]: Invalid user ik from 176.31.61.210 port 46868
Apr 21 09:41:37 penfold sshd[7752]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=176.31.61.210 
Apr 21 09:41:39 penfold sshd[7752]: Failed password for invalid user ik from 176.31.61.210 port 46868 ssh2
Apr 21 09:41:40 penfold sshd[7752]: Received disconnect from 176.31.61.210 port 46868:11: Bye Bye [preauth]
Apr 21 09:41:40 penfold sshd[7752]: Discon........
------------------------------

Invalid user rr from 117.50.140.230 port 39059

Malicious brute force vulnerability hacking attacks

Invalid user m from 113.142.71.35 port 25096

Brute-force attempt banned

Apr 21 21:56:40 [host] sshd[16517]: Invalid user k
Apr 21 21:56:40 [host] sshd[16517]: pam_unix(sshd:
Apr 21 21:56:41 [host] sshd[16517]: Failed passwor

Apr 21 21:47:12 eventyay sshd[18064]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=66.23.225.239
Apr 21 21:47:13 eventyay sshd[18064]: Failed password for invalid user admin from 66.23.225.239 port 60342 ssh2
Apr 21 21:51:09 eventyay sshd[18167]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=66.23.225.239
...

Triggered by Fail2Ban at Ares web server