[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

2019-10-22T11:42:16.912625abusebot-6.cloudsearch.cf sshd\[9604\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=148.70.134.52  user=root

Unauthorized SMTP/IMAP/POP3 connection attempt

22.10.2019 17:23:07 Connection to port 53413 blocked by firewall

Honeypot attack, port: 23, PTR: PTR record not found

Brute force SMTP login attempts.

10/22/2019-14:16:53.779324 45.136.109.82 Protocol: 6 ET SCAN NMAP -sS window 1024

Oct 22 13:25:52 mxgate1 postfix/postscreen[9736]: CONNECT from [171.246.136.82]:14695 to [176.31.12.44]:25
Oct 22 13:25:52 mxgate1 postfix/dnsblog[9782]: addr 171.246.136.82 listed by domain zen.spamhaus.org as 127.0.0.3
Oct 22 13:25:52 mxgate1 postfix/dnsblog[9782]: addr 171.246.136.82 listed by domain zen.spamhaus.org as 127.0.0.11
Oct 22 13:25:52 mxgate1 postfix/dnsblog[9782]: addr 171.246.136.82 listed by domain zen.spamhaus.org as 127.0.0.4
Oct 22 13:25:52 mxgate1 postfix/dnsblog[9738]: addr 171.246.136.82 listed by domain cbl.abuseat.org as 127.0.0.2
Oct 22 13:25:52 mxgate1 postfix/dnsblog[9737]: addr 171.246.136.82 listed by domain b.barracudacentral.org as 127.0.0.2
Oct 22 13:25:58 mxgate1 postfix/postscreen[9736]: DNSBL rank 4 for [171.246.136.82]:14695
Oct x@x
Oct 22 13:25:59 mxgate1 postfix/postscreen[9736]: HANGUP after 1.3 from [171.246.136.82]:14695 in tests after SMTP handshake
Oct 22 13:25:59 mxgate1 postfix/postscreen[9736]: DISCONNECT [171.246.136.82]:........
-------------------------------

Chat Spam

Attempt to run wp-login.php

Oct 22 13:22:10 mxgate1 postfix/postscreen[9736]: CONNECT from [43.229.89.197]:50586 to [176.31.12.44]:25
Oct 22 13:22:10 mxgate1 postfix/dnsblog[9740]: addr 43.229.89.197 listed by domain cbl.abuseat.org as 127.0.0.2
Oct 22 13:22:10 mxgate1 postfix/dnsblog[10046]: addr 43.229.89.197 listed by domain zen.spamhaus.org as 127.0.0.11
Oct 22 13:22:10 mxgate1 postfix/dnsblog[10046]: addr 43.229.89.197 listed by domain zen.spamhaus.org as 127.0.0.4
Oct 22 13:22:10 mxgate1 postfix/dnsblog[9741]: addr 43.229.89.197 listed by domain b.barracudacentral.org as 127.0.0.2
Oct 22 13:22:16 mxgate1 postfix/postscreen[9736]: DNSBL rank 4 for [43.229.89.197]:50586
Oct x@x
Oct 22 13:22:17 mxgate1 postfix/postscreen[9736]: HANGUP after 0.79 from [43.229.89.197]:50586 in tests after SMTP handshake
Oct 22 13:22:17 mxgate1 postfix/postscreen[9736]: DISCONNECT [43.229.89.197]:50586


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=43.229.89.197

Oct 22 16:24:09 dedicated sshd[12910]: Invalid user oracle from 203.186.57.191 port 51084

Oct 22 09:54:18 web9 sshd\[13712\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.63.61  user=root
Oct 22 09:54:20 web9 sshd\[13712\]: Failed password for root from 139.59.63.61 port 41122 ssh2
Oct 22 09:58:50 web9 sshd\[14312\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.63.61  user=root
Oct 22 09:58:53 web9 sshd\[14312\]: Failed password for root from 139.59.63.61 port 51526 ssh2
Oct 22 10:03:23 web9 sshd\[14863\]: Invalid user redis from 139.59.63.61

xmlrpc attack

Oct 22 13:29:18 fry sshd[30570]: refused connect from 172.105.86.114 (172.105.86.114)
Oct 22 13:29:18 fry sshd[30573]: refused connect from 172.105.86.114 (172.105.86.114)
Oct 22 13:29:18 fry sshd[30571]: refused connect from 172.105.86.114 (172.105.86.114)
Oct 22 13:29:18 fry sshd[30572]: refused connect from 172.105.86.114 (172.105.86.114)


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=172.105.86.114

Honeypot attack, port: 23, PTR: 118-166-110-160.dynamic-ip.hinet.net.