[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.388+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923",Challenge="1599650861/52198d4167c3a9a00e5d361ee7f02dcd",Response="6532c6282320ff82d1005d4123862644",ExpectedResponse=""
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="InvalidAccountID",EventTV="2020-09-09T13:27:41.418+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="10",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923"
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.419+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518
...

[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.388+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923",Challenge="1599650861/52198d4167c3a9a00e5d361ee7f02dcd",Response="6532c6282320ff82d1005d4123862644",ExpectedResponse=""
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="InvalidAccountID",EventTV="2020-09-09T13:27:41.418+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="10",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923"
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.419+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518
...

[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.388+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923",Challenge="1599650861/52198d4167c3a9a00e5d361ee7f02dcd",Response="6532c6282320ff82d1005d4123862644",ExpectedResponse=""
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="InvalidAccountID",EventTV="2020-09-09T13:27:41.418+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="10",SessionID="518973635-123769044-452640836",LocalAddress="IPV4/UDP/51.255.2.242/5060",RemoteAddress="IPV4/UDP/5.183.92.170/60923"
[2020-09-09 13:27:41] SECURITY[2022] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-09-09T13:27:41.419+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="518
...

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[2020-07-16 18:26:05] NOTICE[1277] chan_sip.c: Registration from '"543"' failed for '5.183.92.128:52838' - Wrong password
[2020-07-16 18:26:05] SECURITY[1295] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-07-16T18:26:05.073-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="543",SessionID="0x7f175414cf98",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/5.183.92.128/52838",Challenge="328762d7",ReceivedChallenge="328762d7",ReceivedHash="f154eae596210d6e27e3ca3700e7b8de"
[2020-07-16 18:32:29] NOTICE[1277] chan_sip.c: Registration from '"544"' failed for '5.183.92.128:37339' - Wrong password
[2020-07-16 18:32:29] SECURITY[1295] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-07-16T18:32:29.083-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="544",SessionID="0x7f17540de808",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/5.183.92.1
...

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\[Apr 12 06:53:33\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:53654' - Wrong password
\[Apr 12 06:54:20\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:59122' - Wrong password
\[Apr 12 06:54:42\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:60576' - Wrong password
\[Apr 12 06:54:48\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:65343' - Wrong password
\[Apr 12 06:55:00\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:59309' - Wrong password
\[Apr 12 06:55:11\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.183.92.176:51353' - Wrong password
\[Apr 12 06:55:31\] NOTICE\[2019\] chan_sip.c: Registration from '\' failed for '5.1
...

Has tried to attack my server.

POST /index.php/napisat-nam.html HTTP/1.0 303 - index.phpMozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36 OPR/55.0.2994.44

[2020-02-26 22:38:49] NOTICE[14744] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '' failed for '5.183.92.32:64598' (callid: 376215522-649646893-389571818) - Failed to authenticate
[2020-02-26 22:38:49] SECURITY[20721] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-02-26T22:38:49.492+0100",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="",SessionID="376215522-649646893-389571818",LocalAddress="IPV4/UDP/185.118.196.148/5060",RemoteAddress="IPV4/UDP/5.183.92.32/64598",Challenge="1582753129/dad733ecc9e5841b0a1529ab2e7adcda",Response="1de0935f9f82950b6c3e7fb95c212f82",ExpectedResponse=""
[2020-02-26 22:38:49] NOTICE[14744] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '' failed for '5.183.92.32:64598' (callid: 376215522-649646893-389571818) - Failed to authenticate
[2020-02-26 22:38:49] SECURITY[20721] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2020-02-26T22:38:49.563+0

2020-08-21T08:52:04.1470091495-001 sshd[44001]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=68.183.19.84  user=root
2020-08-21T08:52:06.0760841495-001 sshd[44001]: Failed password for root from 68.183.19.84 port 45028 ssh2
2020-08-21T08:56:06.0681321495-001 sshd[44240]: Invalid user anni from 68.183.19.84 port 54340
2020-08-21T08:56:06.0733361495-001 sshd[44240]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=68.183.19.84
2020-08-21T08:56:06.0681321495-001 sshd[44240]: Invalid user anni from 68.183.19.84 port 54340
2020-08-21T08:56:07.8919441495-001 sshd[44240]: Failed password for invalid user anni from 68.183.19.84 port 54340 ssh2
...

Aug 21 15:55:31 ift sshd\[21069\]: Failed password for invalid user admin from 159.65.163.59 port 36534 ssh2Aug 21 15:59:44 ift sshd\[21718\]: Invalid user ed from 159.65.163.59Aug 21 15:59:46 ift sshd\[21718\]: Failed password for invalid user ed from 159.65.163.59 port 41084 ssh2Aug 21 16:03:50 ift sshd\[22799\]: Invalid user juan from 159.65.163.59Aug 21 16:03:52 ift sshd\[22799\]: Failed password for invalid user juan from 159.65.163.59 port 45636 ssh2
...

Aug 21 08:06:36 Tower sshd[3434]: Connection from 66.223.164.237 port 1202 on 192.168.10.220 port 22 rdomain ""
Aug 21 08:06:37 Tower sshd[3434]: Invalid user testuser from 66.223.164.237 port 1202
Aug 21 08:06:37 Tower sshd[3434]: error: Could not get shadow information for NOUSER
Aug 21 08:06:37 Tower sshd[3434]: Failed password for invalid user testuser from 66.223.164.237 port 1202 ssh2
Aug 21 08:06:37 Tower sshd[3434]: Received disconnect from 66.223.164.237 port 1202:11: Bye Bye [preauth]
Aug 21 08:06:37 Tower sshd[3434]: Disconnected from invalid user testuser 66.223.164.237 port 1202 [preauth]

Aug 21 10:12:25 firewall sshd[16700]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=119.45.138.160
Aug 21 10:12:25 firewall sshd[16700]: Invalid user factorio from 119.45.138.160
Aug 21 10:12:27 firewall sshd[16700]: Failed password for invalid user factorio from 119.45.138.160 port 48476 ssh2
...

$f2bV_matches

Aug 21 05:44:10 mockhub sshd[6666]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=203.195.130.233
Aug 21 05:44:12 mockhub sshd[6666]: Failed password for invalid user bash from 203.195.130.233 port 36168 ssh2
...

Aug 21 08:37:33 ny01 sshd[6616]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.99.98.248
Aug 21 08:37:34 ny01 sshd[6616]: Failed password for invalid user esq from 139.99.98.248 port 38196 ssh2
Aug 21 08:42:01 ny01 sshd[7226]: Failed password for root from 139.99.98.248 port 45748 ssh2

Hits on port : 23

Lines containing failures of 106.13.232.197
Aug 20 22:37:49 nxxxxxxx sshd[11308]: Invalid user ivete from 106.13.232.197 port 52556
Aug 20 22:37:49 nxxxxxxx sshd[11308]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.232.197
Aug 20 22:37:51 nxxxxxxx sshd[11308]: Failed password for invalid user ivete from 106.13.232.197 port 52556 ssh2
Aug 20 22:37:51 nxxxxxxx sshd[11308]: Received disconnect from 106.13.232.197 port 52556:11: Bye Bye [preauth]
Aug 20 22:37:51 nxxxxxxx sshd[11308]: Disconnected from invalid user ivete 106.13.232.197 port 52556 [preauth]
Aug 20 22:47:04 nxxxxxxx sshd[13066]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.13.232.197  user=r.r
Aug 20 22:47:06 nxxxxxxx sshd[13066]: Failed password for r.r from 106.13.232.197 port 56808 ssh2
Aug 20 22:47:06 nxxxxxxx sshd[13066]: Received disconnect from 106.13.232.197 port 56808:11: Bye Bye [preauth]
Aug 20 22:47:06 n........
------------------------------

Port scan: Attack repeated for 24 hours

Aug 21 15:50:10 eventyay sshd[7343]: Failed password for root from 222.186.175.212 port 52868 ssh2
Aug 21 15:50:23 eventyay sshd[7343]: error: maximum authentication attempts exceeded for root from 222.186.175.212 port 52868 ssh2 [preauth]
Aug 21 15:50:30 eventyay sshd[7351]: Failed password for root from 222.186.175.212 port 28536 ssh2
...

$f2bV_matches

$f2bV_matches

Aug 21 02:38:54 cumulus sshd[11893]: Invalid user relay from 35.163.166.197 port 42178
Aug 21 02:38:54 cumulus sshd[11893]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=35.163.166.197
Aug 21 02:38:57 cumulus sshd[11893]: Failed password for invalid user relay from 35.163.166.197 port 42178 ssh2
Aug 21 02:38:57 cumulus sshd[11893]: Received disconnect from 35.163.166.197 port 42178:11: Bye Bye [preauth]
Aug 21 02:38:57 cumulus sshd[11893]: Disconnected from 35.163.166.197 port 42178 [preauth]
Aug 21 02:50:57 cumulus sshd[12954]: Invalid user angie from 35.163.166.197 port 60116
Aug 21 02:50:57 cumulus sshd[12954]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=35.163.166.197
Aug 21 02:50:59 cumulus sshd[12954]: Failed password for invalid user angie from 35.163.166.197 port 60116 ssh2
Aug 21 02:50:59 cumulus sshd[12954]: Received disconnect from 35.163.166.197 port 60116:11: Bye Bye [prea........
-------------------------------

Aug 21 12:05:45 game-panel sshd[9016]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=41.225.16.156
Aug 21 12:05:48 game-panel sshd[9016]: Failed password for invalid user apple from 41.225.16.156 port 37148 ssh2
Aug 21 12:06:59 game-panel sshd[9069]: Failed password for root from 41.225.16.156 port 49812 ssh2