\[2019-10-02 10:31:35\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2019-10-02T10:31:35.137+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="\",SessionID="569253123-542477898-1895812680",LocalAddress="IPV4/UDP/188.40.118.248/5060",RemoteAddress="IPV4/UDP/158.69.226.6/57442",Challenge="1570005095/ab027d4bbef7adef4c76f623da31c90c",Response="d010c9bc7b0b6170a63983f369576d3a",ExpectedResponse=""
\[2019-10-02 10:31:35\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponseFailed",EventTV="2019-10-02T10:31:35.431+0200",Severity="Error",Service="PJSIP",EventVersion="1",AccountID="\",SessionID="569253123-542477898-1895812680",LocalAddress="IPV4/UDP/188.40.118.248/5060",RemoteAddress="IPV4/UDP/158.69.226.6/57442",Challenge="1570005095/ab027d4bbef7adef4c76f623da31c90c",Response="f8a2ebb6d3a41456a0eaad17005ed6cc",ExpectedResponse=""
\[2019-10-02 10:31:35\] SECURITY\[1715\] res_security_log.c: SecurityEvent="ChallengeResponse

\[2019-09-11 23:58:17\] SECURITY\[1849\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-11T23:58:17.065-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="300011442922550329",SessionID="0x7fd9a86cbbd8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/158.69.226.6/50622",ACLName="no_extension_match"
\[2019-09-12 00:01:16\] SECURITY\[1849\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-12T00:01:16.838-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="200011442922550329",SessionID="0x7fd9a863a768",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/158.69.226.6/54856",ACLName="no_extension_match"
\[2019-09-12 00:04:00\] SECURITY\[1849\] res_security_log.c: SecurityEvent="FailedACL",EventTV="2019-09-12T00:04:00.291-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="100011442922550329",SessionID="0x7fd9a863a768",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/158.69.226.6/61697",ACLName="

 TCP (SYN) 158.69.226.175:54004 -> port 27983, len 44

TCP port : 27983

 TCP (SYN) 158.69.226.175:54004 -> port 27983, len 44

Port scanning [2 denied]

Aug  2 15:40:37 debian-2gb-nbg1-2 kernel: \[18634112.539997\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=158.69.226.175 DST=195.201.40.59 LEN=40 TOS=0x18 PREC=0x00 TTL=239 ID=58485 PROTO=TCP SPT=46968 DPT=22222 WINDOW=1024 RES=0x00 SYN URGP=0

 TCP (SYN) 158.69.226.175:44819 -> port 25259, len 44

15013/tcp 27567/tcp 27275/tcp...
[2020-06-21/07-07]53pkt,19pt.(tcp)

portscan

Mar 13 11:12:52 aragorn sshd[20388]: Invalid user odoo from 158.69.226.107
Mar 13 11:12:53 aragorn sshd[20390]: Invalid user test from 158.69.226.107
Mar 13 11:12:53 aragorn sshd[20392]: User postgres from ns523267.ip-158-69-226.net not allowed because not listed in AllowUsers
Mar 13 11:12:53 aragorn sshd[20394]: Invalid user oracle from 158.69.226.107
...

Detected by Fail2Ban

Feb  8 07:55:28 server sshd\[5362\]: Invalid user rft from 158.69.226.175
Feb  8 07:55:28 server sshd\[5362\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=ns523335.ip-158-69-226.net 
Feb  8 07:55:30 server sshd\[5362\]: Failed password for invalid user rft from 158.69.226.175 port 55605 ssh2
Feb  8 07:58:37 server sshd\[5584\]: Invalid user rft from 158.69.226.175
Feb  8 07:58:37 server sshd\[5584\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=ns523335.ip-158-69-226.net 
...

Feb  7 17:25:31 tuxlinux sshd[38070]: Invalid user ezk from 158.69.226.175 port 46869
Feb  7 17:25:31 tuxlinux sshd[38070]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=158.69.226.175 
Feb  7 17:25:31 tuxlinux sshd[38070]: Invalid user ezk from 158.69.226.175 port 46869
Feb  7 17:25:31 tuxlinux sshd[38070]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=158.69.226.175 
Feb  7 17:25:31 tuxlinux sshd[38070]: Invalid user ezk from 158.69.226.175 port 46869
Feb  7 17:25:31 tuxlinux sshd[38070]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=158.69.226.175 
Feb  7 17:25:33 tuxlinux sshd[38070]: Failed password for invalid user ezk from 158.69.226.175 port 46869 ssh2
...

2020-02-06T08:32:12.6921761495-001 sshd[37707]: Invalid user uwf from 158.69.226.175 port 43727
2020-02-06T08:32:12.7045611495-001 sshd[37707]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=ns523335.ip-158-69-226.net
2020-02-06T08:32:12.6921761495-001 sshd[37707]: Invalid user uwf from 158.69.226.175 port 43727
2020-02-06T08:32:14.1958071495-001 sshd[37707]: Failed password for invalid user uwf from 158.69.226.175 port 43727 ssh2
2020-02-06T08:44:11.4685801495-001 sshd[38399]: Invalid user jzk from 158.69.226.175 port 34271
2020-02-06T08:44:11.4783661495-001 sshd[38399]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=ns523335.ip-158-69-226.net
2020-02-06T08:44:11.4685801495-001 sshd[38399]: Invalid user jzk from 158.69.226.175 port 34271
2020-02-06T08:44:13.6839741495-001 sshd[38399]: Failed password for invalid user jzk from 158.69.226.175 port 34271 ssh2
2020-02-06T08:48:15.2886381495-001 sshd[38622]: 
...

Feb  3 14:38:32 legacy sshd[10148]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=158.69.226.175
Feb  3 14:38:34 legacy sshd[10148]: Failed password for invalid user venus from 158.69.226.175 port 34845 ssh2
Feb  3 14:41:16 legacy sshd[10322]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=158.69.226.175
...

Jan 13 01:38:30 mout sshd[7743]: Invalid user c from 158.69.226.175 port 48698

Jun 28 23:37:45 vpn01 sshd[3042]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.38.3.138
Jun 28 23:37:47 vpn01 sshd[3042]: Failed password for invalid user xys from 185.38.3.138 port 43114 ssh2
...

Jun 29 00:35:05 mail sshd\[15123\]: Invalid user admin from 195.234.21.211
Jun 29 00:35:06 mail sshd\[15123\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=195.234.21.211
Jun 29 00:35:08 mail sshd\[15123\]: Failed password for invalid user admin from 195.234.21.211 port 59118 ssh2

Jun 29 00:19:24 plex sshd[25630]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.15.46.184  user=root
Jun 29 00:19:26 plex sshd[25630]: Failed password for root from 51.15.46.184 port 54736 ssh2

Jun 29 00:08:37 piServer sshd[18780]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=195.97.75.174 
Jun 29 00:08:39 piServer sshd[18780]: Failed password for invalid user postgres from 195.97.75.174 port 47620 ssh2
Jun 29 00:12:29 piServer sshd[19588]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=195.97.75.174 
...

Jun 28 15:22:05 dignus sshd[6774]: Failed password for root from 49.88.112.111 port 10309 ssh2
Jun 28 15:23:07 dignus sshd[6856]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.111  user=root
Jun 28 15:23:08 dignus sshd[6856]: Failed password for root from 49.88.112.111 port 22063 ssh2
Jun 28 15:23:53 dignus sshd[6974]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.88.112.111  user=root
Jun 28 15:23:55 dignus sshd[6974]: Failed password for root from 49.88.112.111 port 30835 ssh2
...

Jun 29 00:24:10 piServer sshd[20828]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.88.246 
Jun 29 00:24:12 piServer sshd[20828]: Failed password for invalid user unix from 106.12.88.246 port 45580 ssh2
Jun 29 00:27:19 piServer sshd[21303]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.88.246 
...

Jun 28 22:25:23 ns382633 sshd\[3191\]: Invalid user linjk from 5.196.64.61 port 42438
Jun 28 22:25:23 ns382633 sshd\[3191\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.196.64.61
Jun 28 22:25:25 ns382633 sshd\[3191\]: Failed password for invalid user linjk from 5.196.64.61 port 42438 ssh2
Jun 28 22:37:05 ns382633 sshd\[5318\]: Invalid user rho from 5.196.64.61 port 43690
Jun 28 22:37:05 ns382633 sshd\[5318\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.196.64.61

Jun 28 23:38:37 h1745522 sshd[24317]: Invalid user adam from 67.205.135.127 port 57554
Jun 28 23:38:37 h1745522 sshd[24317]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=67.205.135.127
Jun 28 23:38:37 h1745522 sshd[24317]: Invalid user adam from 67.205.135.127 port 57554
Jun 28 23:38:39 h1745522 sshd[24317]: Failed password for invalid user adam from 67.205.135.127 port 57554 ssh2
Jun 28 23:40:55 h1745522 sshd[24523]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=67.205.135.127  user=root
Jun 28 23:40:56 h1745522 sshd[24523]: Failed password for root from 67.205.135.127 port 38668 ssh2
Jun 28 23:43:05 h1745522 sshd[24650]: Invalid user za from 67.205.135.127 port 48010
Jun 28 23:43:05 h1745522 sshd[24650]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=67.205.135.127
Jun 28 23:43:05 h1745522 sshd[24650]: Invalid user za from 67.205.135.127 port 48010
Jun 28 23:4
...

Automatic report - XMLRPC Attack

(imapd) Failed IMAP login from 182.48.234.227 (IN/India/182.48.234.227.dvois.com): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: Jun 29 01:07:04 ir1 dovecot[2885757]: imap-login: Disconnected (auth failed, 1 attempts in 6 secs): user=, method=PLAIN, rip=182.48.234.227, lip=5.63.12.44, TLS, session=<1hZT5yqp0ue2MOrj>

Attempted Brute Force (dovecot)

Automatic report - Banned IP Access

Jun 28 23:42:45 abendstille sshd\[7477\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=62.234.130.87  user=root
Jun 28 23:42:46 abendstille sshd\[7477\]: Failed password for root from 62.234.130.87 port 56570 ssh2
Jun 28 23:49:01 abendstille sshd\[14316\]: Invalid user steven from 62.234.130.87
Jun 28 23:49:01 abendstille sshd\[14316\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=62.234.130.87
Jun 28 23:49:03 abendstille sshd\[14316\]: Failed password for invalid user steven from 62.234.130.87 port 45588 ssh2
...

Invalid user ariel from 139.199.1.166 port 51608

Jun 29 00:02:13 lnxded64 sshd[17796]: Failed password for root from 54.38.42.63 port 46716 ssh2
Jun 29 00:02:13 lnxded64 sshd[17796]: Failed password for root from 54.38.42.63 port 46716 ssh2