[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

$f2bV_matches

Aug 24 17:05:26 hb sshd\[25869\]: Invalid user marie from 107.172.156.169
Aug 24 17:05:26 hb sshd\[25869\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=107.172.156.169
Aug 24 17:05:28 hb sshd\[25869\]: Failed password for invalid user marie from 107.172.156.169 port 47126 ssh2
Aug 24 17:09:57 hb sshd\[26297\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=107.172.156.169  user=root
Aug 24 17:09:58 hb sshd\[26297\]: Failed password for root from 107.172.156.169 port 41872 ssh2

Aug 24 06:04:45 auw2 sshd\[8414\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.66  user=root
Aug 24 06:04:47 auw2 sshd\[8414\]: Failed password for root from 49.88.112.66 port 35814 ssh2
Aug 24 06:04:50 auw2 sshd\[8414\]: Failed password for root from 49.88.112.66 port 35814 ssh2
Aug 24 06:04:53 auw2 sshd\[8414\]: Failed password for root from 49.88.112.66 port 35814 ssh2
Aug 24 06:05:55 auw2 sshd\[8534\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.66  user=root

port scan and connect, tcp 23 (telnet)

F2B jail: sshd. Time: 2019-08-24 18:16:14, Reported by: VKReport

Aug 24 02:44:49 tdfoods sshd\[15019\]: Invalid user lazano from 200.150.87.131
Aug 24 02:44:49 tdfoods sshd\[15019\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=200.150.87.131
Aug 24 02:44:51 tdfoods sshd\[15019\]: Failed password for invalid user lazano from 200.150.87.131 port 33368 ssh2
Aug 24 02:50:11 tdfoods sshd\[15517\]: Invalid user arena from 200.150.87.131
Aug 24 02:50:11 tdfoods sshd\[15517\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=200.150.87.131

Aug 24 15:51:15 hcbbdb sshd\[11776\]: Invalid user manish from 152.136.96.94
Aug 24 15:51:15 hcbbdb sshd\[11776\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=152.136.96.94
Aug 24 15:51:18 hcbbdb sshd\[11776\]: Failed password for invalid user manish from 152.136.96.94 port 39882 ssh2
Aug 24 15:57:29 hcbbdb sshd\[12477\]: Invalid user e from 152.136.96.94
Aug 24 15:57:29 hcbbdb sshd\[12477\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=152.136.96.94

Invalid user pi from 151.29.190.250 port 56000

Aug 24 18:20:25 icinga sshd[23255]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.37.157.219
Aug 24 18:20:26 icinga sshd[23255]: Failed password for invalid user nas from 54.37.157.219 port 39102 ssh2
...

Aug 24 07:03:26 hanapaa sshd\[15919\]: Invalid user patricia from 51.38.234.224
Aug 24 07:03:26 hanapaa sshd\[15919\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=224.ip-51-38-234.eu
Aug 24 07:03:28 hanapaa sshd\[15919\]: Failed password for invalid user patricia from 51.38.234.224 port 51660 ssh2
Aug 24 07:07:31 hanapaa sshd\[16240\]: Invalid user uk from 51.38.234.224
Aug 24 07:07:31 hanapaa sshd\[16240\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=224.ip-51-38-234.eu

Bruteforce on SSH Honeypot

Aug 24 19:27:26 pkdns2 sshd\[16289\]: Invalid user ftphome from 114.143.139.38Aug 24 19:27:28 pkdns2 sshd\[16289\]: Failed password for invalid user ftphome from 114.143.139.38 port 33772 ssh2Aug 24 19:32:06 pkdns2 sshd\[16495\]: Invalid user gateway from 114.143.139.38Aug 24 19:32:08 pkdns2 sshd\[16495\]: Failed password for invalid user gateway from 114.143.139.38 port 53006 ssh2Aug 24 19:36:49 pkdns2 sshd\[16679\]: Invalid user a from 114.143.139.38Aug 24 19:36:52 pkdns2 sshd\[16679\]: Failed password for invalid user a from 114.143.139.38 port 44532 ssh2
...

Aug 24 11:24:35   TCP Attack: SRC=1.255.101.80 DST=[Masked] LEN=40 TOS=0x08 PREC=0x20 TTL=54  DF PROTO=TCP SPT=47396 DPT=80 WINDOW=29200 RES=0x00 SYN URGP=0

Aug 24 06:32:16 auw2 sshd\[11675\]: Invalid user tweety from 159.65.222.153
Aug 24 06:32:16 auw2 sshd\[11675\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.65.222.153
Aug 24 06:32:18 auw2 sshd\[11675\]: Failed password for invalid user tweety from 159.65.222.153 port 59056 ssh2
Aug 24 06:36:39 auw2 sshd\[12033\]: Invalid user rpm from 159.65.222.153
Aug 24 06:36:39 auw2 sshd\[12033\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.65.222.153

Aug 24 17:36:26 www sshd[18579]: refused connect from 159.203.169.16 (159.203.169.16) - 3 ssh attempts