Aug 23 21:53:33 SilenceServices sshd[7999]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.37.157.219
Aug 23 21:53:35 SilenceServices sshd[7999]: Failed password for invalid user xyzzy from 54.37.157.219 port 49254 ssh2
Aug 23 21:57:58 SilenceServices sshd[11701]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.37.157.219

Aug 24 02:12:16 lnxweb61 sshd[24412]: Failed password for root from 14.35.249.205 port 47448 ssh2
Aug 24 02:18:48 lnxweb61 sshd[30277]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.35.249.205
Aug 24 02:18:49 lnxweb61 sshd[30277]: Failed password for invalid user webadmin from 14.35.249.205 port 40995 ssh2

2019-08-23 17:28:05 unexpected disconnection while reading SMTP command from ([223.237.41.5]) [223.237.14.77]:60733 I=[10.100.18.25]:25 (error: Connection reset by peer)
2019-08-23 17:29:34 unexpected disconnection while reading SMTP command from ([223.237.41.5]) [223.237.14.77]:9974 I=[10.100.18.25]:25 (error: Connection reset by peer)
2019-08-23 17:30:23 unexpected disconnection while reading SMTP command from ([223.237.41.5]) [223.237.14.77]:24359 I=[10.100.18.25]:25 (error: Connection reset by peer)


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=223.237.14.77

Aug 23 21:08:20 dedicated sshd[1374]: Invalid user pmd from 175.19.30.46 port 53002

Aug 24 02:37:39 hosting sshd[22350]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=91.194.211.40  user=postgres
Aug 24 02:37:41 hosting sshd[22350]: Failed password for postgres from 91.194.211.40 port 32900 ssh2
Aug 24 02:41:07 hosting sshd[22729]: Invalid user tester from 91.194.211.40 port 38730
...

Aug 23 14:00:46 auw2 sshd\[10858\]: Invalid user ftpuser from 177.7.217.57
Aug 23 14:00:46 auw2 sshd\[10858\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=4832574137.e.brasiltelecom.net.br
Aug 23 14:00:48 auw2 sshd\[10858\]: Failed password for invalid user ftpuser from 177.7.217.57 port 33140 ssh2
Aug 23 14:06:31 auw2 sshd\[11393\]: Invalid user tanvir from 177.7.217.57
Aug 23 14:06:31 auw2 sshd\[11393\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=4832574137.e.brasiltelecom.net.br

Aug 23 20:04:59 OPSO sshd\[11881\]: Invalid user zzz from 85.241.49.89 port 38608
Aug 23 20:04:59 OPSO sshd\[11881\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=85.241.49.89
Aug 23 20:05:01 OPSO sshd\[11881\]: Failed password for invalid user zzz from 85.241.49.89 port 38608 ssh2
Aug 23 20:09:11 OPSO sshd\[12421\]: Invalid user wuhao from 85.241.49.89 port 54756
Aug 23 20:09:11 OPSO sshd\[12421\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=85.241.49.89

Aug 24 01:50:31 ks10 sshd[21231]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=137.74.25.247 
Aug 24 01:50:33 ks10 sshd[21231]: Failed password for invalid user noc from 137.74.25.247 port 51779 ssh2
...

Aug 24 02:18:29 relay postfix/smtpd\[30092\]: warning: unknown\[80.82.77.18\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Aug 24 02:18:48 relay postfix/smtpd\[19308\]: warning: unknown\[80.82.77.18\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Aug 24 02:19:08 relay postfix/smtpd\[20034\]: warning: unknown\[80.82.77.18\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Aug 24 02:19:26 relay postfix/smtpd\[3776\]: warning: unknown\[80.82.77.18\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Aug 24 02:19:45 relay postfix/smtpd\[30092\]: warning: unknown\[80.82.77.18\]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
...

\[2019-08-24 01:26:35\] NOTICE\[29653\] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '\' failed for '5.62.41.134:2337' \(callid: 2143043886-197359368-1462043865\) - Failed to authenticate
\[2019-08-24 01:26:35\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2019-08-24T01:26:35.676+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="\",SessionID="2143043886-197359368-1462043865",LocalAddress="IPV4/UDP/188.40.118.248/5060",RemoteAddress="IPV4/UDP/5.62.41.134/2337",Challenge="1566602795/f805f448d2791fe52cfc2c603c737b79",Response="ff4a09a0518b2417f3c152a177c45c8d",ExpectedResponse=""
\[2019-08-24 01:26:35\] NOTICE\[3817\] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '\' failed for '5.62.41.134:2337' \(callid: 2143043886-197359368-1462043865\) - Failed to authenticate
\[2019-08-24 01:26:35\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseFailed"

NAME : "" "" CIDR :  | STATUS : 403 {Looking for resource vulnerabilities} DDoS Attack  - block certain countries :) IP: 154.16.69.130  Denial-of-Service Attack (DoS) Detected and Blocked by ADMIN  - data recovery https://help-dysk.pl

Aug 24 02:05:03 mail postfix/smtpd\[12302\]: warning: 185-118-198-140.clients.srvfarm.net\[185.118.198.140\]: SASL CRAM-MD5 authentication failed: Invalid authentication mechanism
Aug 24 02:05:31 mail postfix/smtpd\[11802\]: warning: 185-118-198-140.clients.srvfarm.net\[185.118.198.140\]: SASL CRAM-MD5 authentication failed: Invalid authentication mechanism
Aug 24 02:05:31 mail postfix/smtpd\[11920\]: warning: 185-118-198-140.clients.srvfarm.net\[185.118.198.140\]: SASL CRAM-MD5 authentication failed: Invalid authentication mechanism
Aug 24 02:05:31 mail postfix/smtpd\[15649\]: warning: 185-118-198-140.clients.srvfarm.net\[185.118.198.140\]: SASL CRAM-MD5 authentication failed: Invalid authentication mechanism

$f2bV_matches

Aug 24 02:20:36 pornomens sshd\[25926\]: Invalid user cam from 81.30.212.14 port 34086
Aug 24 02:20:36 pornomens sshd\[25926\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=81.30.212.14
Aug 24 02:20:37 pornomens sshd\[25926\]: Failed password for invalid user cam from 81.30.212.14 port 34086 ssh2
...

Aug 23 10:49:42 hiderm sshd\[16534\]: Invalid user hauptinhaltsverzeichnis from 62.4.23.104
Aug 23 10:49:42 hiderm sshd\[16534\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=62.4.23.104
Aug 23 10:49:44 hiderm sshd\[16534\]: Failed password for invalid user hauptinhaltsverzeichnis from 62.4.23.104 port 34560 ssh2
Aug 23 10:53:39 hiderm sshd\[16934\]: Invalid user kyuubi from 62.4.23.104
Aug 23 10:53:39 hiderm sshd\[16934\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=62.4.23.104