\[2019-09-20 06:03:37\] NOTICE\[29653\] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '\' failed for '81.171.85.181:55490' \(callid: 424849820-497256448-382476822\) - Failed to authenticate
\[2019-09-20 06:03:37\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2019-09-20T06:03:37.563+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="\",SessionID="424849820-497256448-382476822",LocalAddress="IPV4/UDP/188.40.118.248/5060",RemoteAddress="IPV4/UDP/81.171.85.181/55490",Challenge="1568952217/0ab54a6913893c63779b8187972be11a",Response="6eda58e282939b8b2064f103fc0ad351",ExpectedResponse=""
\[2019-09-20 06:03:37\] NOTICE\[23191\] res_pjsip/pjsip_distributor.c: Request 'REGISTER' from '\' failed for '81.171.85.181:55490' \(callid: 424849820-497256448-382476822\) - Failed to authenticate
\[2019-09-20 06:03:37\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseFai

Unauthorized connection attempt from IP address 36.65.123.99 on Port 445(SMB)

Sep 20 04:24:47 ns41 sshd[26459]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=104.131.22.72

Automatic report - Port Scan Attack

Sep 20 11:24:48 webhost01 sshd[17351]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=150.254.222.97
Sep 20 11:24:49 webhost01 sshd[17351]: Failed password for invalid user upload from 150.254.222.97 port 58447 ssh2
...

$f2bV_matches

SMTP try to deliver spam to harvested address.

2019-09-20T04:21:27.332709abusebot-3.cloudsearch.cf sshd\[22638\]: Invalid user ubuntu-studio from 182.61.58.131 port 56084

Unauthorized connection attempt from IP address 188.43.12.65 on Port 445(SMB)

spam tolerant fucks

\[2019-09-20 01:08:20\] SECURITY\[2283\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-20T01:08:20.055-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="00035901148343508004",SessionID="0x7fcd8c8702f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.110.138/49748",ACLName="no_extension_match"
\[2019-09-20 01:08:32\] SECURITY\[2283\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-20T01:08:32.659-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="0001035401148556213002",SessionID="0x7fcd8c1c4788",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.110.138/63938",ACLName="no_extension_match"
\[2019-09-20 01:08:47\] SECURITY\[2283\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-20T01:08:47.415-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="0002036101148585359005",SessionID="0x7fcd8c33e188",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/77.247.110.138/

Sep 20 07:14:57 www sshd\[180395\]: Invalid user norberto from 218.29.42.220
Sep 20 07:14:57 www sshd\[180395\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.29.42.220
Sep 20 07:14:59 www sshd\[180395\]: Failed password for invalid user norberto from 218.29.42.220 port 58863 ssh2
...

2019-09-20T00:10:59.8487141495-001 sshd\[28075\]: Failed password for invalid user qwerty from 144.217.93.130 port 41762 ssh2
2019-09-20T00:28:47.4033661495-001 sshd\[29342\]: Invalid user january from 144.217.93.130 port 33810
2019-09-20T00:28:47.4121461495-001 sshd\[29342\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=130.ip-144-217-93.net
2019-09-20T00:28:49.2253751495-001 sshd\[29342\]: Failed password for invalid user january from 144.217.93.130 port 33810 ssh2
2019-09-20T00:33:14.4618981495-001 sshd\[29810\]: Invalid user 123 from 144.217.93.130 port 45940
2019-09-20T00:33:14.4701411495-001 sshd\[29810\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=130.ip-144-217-93.net
...

SSH Brute-Force reported by Fail2Ban

Unauthorized connection attempt from IP address 200.68.137.236 on Port 445(SMB)