\[Apr 12 06:53:33\] 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
...

[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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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

This IP probed my network for almost an hour and a half on December 10th, 2019.
Logs from my system:
Dec 10 05:26:19 neutron sshd[8312]: Honey: Username: web1 Password: newgeneration Host: 165.227.70.23
Dec 10 05:26:25 neutron sshd[8316]: Honey: Username: web1 Password: newtest Host: 165.227.70.23
Dec 10 05:26:25 neutron sshd[8315]: Honey: Username: test Password: asdfgh Host: 165.227.70.23
Dec 10 05:26:30 neutron sshd[8319]: Honey: Username: web1 Password: p@55w0rd Host: 165.227.70.23
Dec 10 05:26:30 neutron sshd[8320]: Honey: Username: test Password: dr0gatu Host: 165.227.70.23
Dec 10 05:26:36 neutron sshd[8323]: Honey: Username: web1 Password: p@ssw0rd Host: 165.227.70.23
Dec 10 05:26:36 neutron sshd[8324]: Honey: Username: test Password: intex306 Host: 165.227.70.23
Dec 10 05:26:42 neutron sshd[8327]: Honey: Username: web1 Password: password Host: 165.227.70.23
Dec 10 05:26:42 neutron sshd[8328]: Honey: Username: test Password: password Host: 165.227.70.23
Dec 10 05:26:47 neutron sshd[8332]: Honey: Username: test Password: pustyu12345 Host: 165.227.70.23
Dec 10 05:26:47 neutron sshd[8331]: Honey: Username: web1 Password: web1 Host: 165.227.70.23
Dec 10 05:26:53 neutron sshd[8336]: Honey: Username: web1 Password: web123 Host: 165.227.70.23
Dec 10 05:26:53 neutron sshd[8335]: Honey: Username: test Password: qwerty Host: 165.227.70.23
Dec 10 05:26:59 neutron sshd[8339]: Honey: Username: web2 Password: 123 Host: 165.227.70.23
Dec 10 05:26:59 neutron sshd[8340]: Honey: Username: test Password: root Host: 165.227.70.23

Dec 10 05:19:24 kapalua sshd\[26798\]: Invalid user schreifels from 178.33.233.54
Dec 10 05:19:24 kapalua sshd\[26798\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=ns231729.ovh.net
Dec 10 05:19:26 kapalua sshd\[26798\]: Failed password for invalid user schreifels from 178.33.233.54 port 45903 ssh2
Dec 10 05:25:02 kapalua sshd\[27300\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=ns231729.ovh.net  user=root
Dec 10 05:25:04 kapalua sshd\[27300\]: Failed password for root from 178.33.233.54 port 49952 ssh2

Dec 10 15:47:12 vps691689 sshd[4472]: Failed password for root from 178.128.223.243 port 36672 ssh2
Dec 10 15:54:14 vps691689 sshd[4705]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.128.223.243
...

Fail2Ban - SSH Bruteforce Attempt

fell into ViewStateTrap:vaduz

Dec 10 10:29:46 markkoudstaal sshd[15425]: Failed password for news from 167.114.98.96 port 55836 ssh2
Dec 10 10:35:08 markkoudstaal sshd[15993]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=167.114.98.96
Dec 10 10:35:10 markkoudstaal sshd[15993]: Failed password for invalid user padubrin from 167.114.98.96 port 35740 ssh2

Dec 10 05:04:51 sachi sshd\[18370\]: Invalid user server from 50.207.12.103
Dec 10 05:04:51 sachi sshd\[18370\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=50-207-12-103-static.hfc.comcastbusiness.net
Dec 10 05:04:53 sachi sshd\[18370\]: Failed password for invalid user server from 50.207.12.103 port 57950 ssh2
Dec 10 05:10:13 sachi sshd\[19008\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=50-207-12-103-static.hfc.comcastbusiness.net  user=root
Dec 10 05:10:16 sachi sshd\[19008\]: Failed password for root from 50.207.12.103 port 37560 ssh2

2019-12-10T15:06:17.199334shield sshd\[8777\]: Invalid user on from 210.242.67.17 port 49962
2019-12-10T15:06:17.203791shield sshd\[8777\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=210-242-67-17.hinet-ip.hinet.net
2019-12-10T15:06:18.799348shield sshd\[8777\]: Failed password for invalid user on from 210.242.67.17 port 49962 ssh2
2019-12-10T15:12:25.727623shield sshd\[10237\]: Invalid user wwwrun from 210.242.67.17 port 59438
2019-12-10T15:12:25.731813shield sshd\[10237\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=210-242-67-17.hinet-ip.hinet.net

Dec 10 15:54:05 vpn01 sshd[15338]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=113.31.112.11
Dec 10 15:54:08 vpn01 sshd[15338]: Failed password for invalid user zoie from 113.31.112.11 port 41966 ssh2
...

12/10/2019-10:05:11.102400 185.176.27.254 Protocol: 6 ET SCAN NMAP -sS window 1024

Dec 10 06:35:47 Tower sshd[22803]: Connection from 202.175.22.53 port 35650 on 192.168.10.220 port 22
Dec 10 06:35:51 Tower sshd[22803]: Invalid user pj from 202.175.22.53 port 35650
Dec 10 06:35:51 Tower sshd[22803]: error: Could not get shadow information for NOUSER
Dec 10 06:35:51 Tower sshd[22803]: Failed password for invalid user pj from 202.175.22.53 port 35650 ssh2
Dec 10 06:35:51 Tower sshd[22803]: Received disconnect from 202.175.22.53 port 35650:11: Bye Bye [preauth]
Dec 10 06:35:51 Tower sshd[22803]: Disconnected from invalid user pj 202.175.22.53 port 35650 [preauth]

Dec 10 05:28:26 hpm sshd\[5698\]: Invalid user jokern from 14.225.11.25
Dec 10 05:28:26 hpm sshd\[5698\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.225.11.25
Dec 10 05:28:28 hpm sshd\[5698\]: Failed password for invalid user jokern from 14.225.11.25 port 41606 ssh2
Dec 10 05:35:07 hpm sshd\[6952\]: Invalid user admin from 14.225.11.25
Dec 10 05:35:07 hpm sshd\[6952\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=14.225.11.25

SIP/5060 Probe, BF, Hack -

SIP/5060 Probe, BF, Hack -

2019-12-10T15:17:22.103633shield sshd\[11284\]: Invalid user dedo from 110.35.173.103 port 59992
2019-12-10T15:17:22.108059shield sshd\[11284\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=110.35.173.103
2019-12-10T15:17:23.997468shield sshd\[11284\]: Failed password for invalid user dedo from 110.35.173.103 port 59992 ssh2
2019-12-10T15:23:46.770555shield sshd\[13110\]: Invalid user kusum from 110.35.173.103 port 39596
2019-12-10T15:23:46.775232shield sshd\[13110\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=110.35.173.103