Sep 10 23:44:22 lenivpn01 kernel: \[384666.430361\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:2f:6c:1b:d2:74:7f:6e:37:e3:08:00 SRC=37.49.230.216 DST=195.201.121.15 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=54321 PROTO=TCP SPT=43835 DPT=81 WINDOW=65535 RES=0x00 SYN URGP=0 
Sep 11 06:58:31 lenivpn01 kernel: \[410714.269318\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:2f:6c:1b:d2:74:7f:6e:37:e3:08:00 SRC=37.49.230.216 DST=195.201.121.15 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=54321 PROTO=TCP SPT=54372 DPT=81 WINDOW=65535 RES=0x00 SYN URGP=0 
Sep 11 15:54:54 lenivpn01 kernel: \[442896.761590\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:2f:6c:1b:d2:74:7f:6e:37:e3:08:00 SRC=37.49.230.216 DST=195.201.121.15 LEN=40 TOS=0x00 PREC=0x00 TTL=247 ID=54321 PROTO=TCP SPT=53922 DPT=81 WINDOW=65535 RES=0x00 SYN URGP=0 
...

Scanning random ports - tries to find possible vulnerable services

Splunk® : port scan detected:
Aug 25 23:29:08 testbed kernel: Firewall: *TCP_IN Blocked* IN=eth0 OUT= MAC=82:c6:52:d1:6e:53:c0:42:d0:39:2c:30:08:00 SRC=37.49.230.216 DST=104.248.11.191 LEN=40 TOS=0x00 PREC=0x00 TTL=241 ID=54321 PROTO=TCP SPT=40071 DPT=81 WINDOW=65535 RES=0x00 SYN URGP=0

Honeypot attack, port: 81, PTR: PTR record not found

81/tcp 389/udp...
[2019-07-01/22]195pkt,1pt.(tcp),1pt.(udp)

Port scan attempt detected by AWS-CCS, CTS, India

Jul 19 14:41:32 box kernel: [1654718.030115] [UFW BLOCK] IN=eth0 OUT= MAC=[munged] SRC=37.49.230.216 DST=[munged] LEN=40 TOS=0x08 PREC=0x20 TTL=247 ID=54321 PROTO=TCP SPT=41155 DPT=81 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul 19 15:06:50 box kernel: [1656235.459750] [UFW BLOCK] IN=eth0 OUT= MAC=[munged] SRC=37.49.230.216 DST=[munged] LEN=40 TOS=0x08 PREC=0x20 TTL=247 ID=54321 PROTO=TCP SPT=53987 DPT=81 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul 19 18:48:48 box kernel: [1669553.300839] [UFW BLOCK] IN=eth0 OUT= MAC=[munged] SRC=37.49.230.216 DST=[munged] LEN=40 TOS=0x08 PREC=0x20 TTL=247 ID=54321 PROTO=TCP SPT=35036 DPT=81 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul 19 23:40:58 box kernel: [1687083.624111] [UFW BLOCK] IN=eth0 OUT= MAC=[munged] SRC=37.49.230.216 DST=[munged] LEN=40 TOS=0x08 PREC=0x20 TTL=247 ID=54321 PROTO=TCP SPT=39019 DPT=81 WINDOW=65535 RES=0x00 SYN URGP=0 
Jul 20 01:26:15 box kernel: [1693400.326638] [UFW BLOCK] IN=eth0 OUT= MAC=[munged] SRC=37.49.230.216 DST=[munged] LEN=40 TOS=0x08 PREC=0x20 TTL=247 ID=

07.07.2019 03:47:17 Connection to port 81 blocked by firewall

Bible

2020-10-13T06:44:21.356144news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
2020-10-13T06:44:25.395781news0 dovecot[21131]: pop3-login: Aborted login (auth failed, 1 attempts in 4 secs): user=, method=PLAIN, rip=37.49.230.238, lip=95.111.246.42, session=
2020-10-13T06:44:28.401407news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
...

2020-10-13T06:44:21.356144news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
2020-10-13T06:44:25.395781news0 dovecot[21131]: pop3-login: Aborted login (auth failed, 1 attempts in 4 secs): user=, method=PLAIN, rip=37.49.230.238, lip=95.111.246.42, session=
2020-10-13T06:44:28.401407news0 auth[956]: pam_unix(dovecot:auth): authentication failure; logname= uid=0 euid=0 tty=dovecot ruser=admin rhost=37.49.230.238
...

Dovecot Invalid User Login Attempt.

"AmooT";tag=3533393765393339313363340132313832313335333935

\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.624+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffea08d88",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="096f171f",ReceivedChallenge="096f171f",ReceivedHash="b099bdfad5869da4ae2114a56a2b4299"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.759+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffeab8148",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="233a417c",ReceivedChallenge="233a417c",ReceivedHash="0017581d14759d4b5ad3a404ed924131"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.783+0200",Severity="Error",Service="SIP",EventVersion="2",Accoun
...

\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.624+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffea08d88",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="096f171f",ReceivedChallenge="096f171f",ReceivedHash="b099bdfad5869da4ae2114a56a2b4299"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.759+0200",Severity="Error",Service="SIP",EventVersion="2",AccountID="100",SessionID="0x7f0ffeab8148",LocalAddress="IPV4/UDP/204.8.216.89/5060",RemoteAddress="IPV4/UDP/37.49.230.126/5862",Challenge="233a417c",ReceivedChallenge="233a417c",ReceivedHash="0017581d14759d4b5ad3a404ed924131"
\[2020-10-02 15:01:13\] SECURITY\[6939\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-10-02T15:01:13.783+0200",Severity="Error",Service="SIP",EventVersion="2",Accoun
...

[N1.H1.VM1] Port Scanner Detected Blocked by UFW

SIP Server BruteForce Attack

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

[2020-09-30 18:00:12] NOTICE[1159][C-0000421d] chan_sip.c: Call from '' (37.49.230.201:64644) to extension '12526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:12] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:12.866-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="12526890745",SessionID="0x7fcaa045f8f8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/64644",ACLName="no_extension_match"
[2020-09-30 18:00:26] NOTICE[1159][C-0000421f] chan_sip.c: Call from '' (37.49.230.201:57391) to extension '712526890745' rejected because extension not found in context 'public'.
[2020-09-30 18:00:26] SECURITY[1198] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-09-30T18:00:26.237-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="712526890745",SessionID="0x7fcaa04d8d08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/37.49.230.201/
...

Hellooo

Hellooo

Sep 28 15:49:19 : SSH login attempts with invalid user

Oct  5 12:04:18 game-panel sshd[2018]: Failed password for root from 178.128.242.233 port 47712 ssh2
Oct  5 12:07:47 game-panel sshd[2122]: Failed password for root from 178.128.242.233 port 58990 ssh2

2019-10-05T15:26:51.762188shield sshd\[17508\]: Invalid user 4rfv3edc2wsx1qaz from 220.76.107.50 port 47048
2019-10-05T15:26:51.767306shield sshd\[17508\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=220.76.107.50
2019-10-05T15:26:53.561346shield sshd\[17508\]: Failed password for invalid user 4rfv3edc2wsx1qaz from 220.76.107.50 port 47048 ssh2
2019-10-05T15:31:51.203834shield sshd\[17984\]: Invalid user David@2017 from 220.76.107.50 port 41122
2019-10-05T15:31:51.208192shield sshd\[17984\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=220.76.107.50

IMAP

Oct  5 13:32:24 SilenceServices sshd[2035]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=193.70.2.117
Oct  5 13:32:27 SilenceServices sshd[2035]: Failed password for invalid user Amor1@3 from 193.70.2.117 port 54888 ssh2
Oct  5 13:35:47 SilenceServices sshd[3000]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=193.70.2.117

Oct  5 16:12:34 km20725 sshd\[10684\]: Failed password for root from 49.88.112.63 port 59700 ssh2Oct  5 16:12:34 km20725 sshd\[10686\]: Failed password for root from 49.88.112.63 port 31148 ssh2Oct  5 16:12:34 km20725 sshd\[10682\]: Failed password for root from 49.88.112.63 port 22738 ssh2Oct  5 16:12:37 km20725 sshd\[10684\]: Failed password for root from 49.88.112.63 port 59700 ssh2
...

Oct  3 15:45:02 mail sshd[13433]: Invalid user test from 51.255.174.215
...

Automatic report - Banned IP Access

2019-10-05T10:10:35.1270721495-001 sshd\[22883\]: Invalid user Haslo_1@3 from 142.93.174.47 port 33646
2019-10-05T10:10:35.1304571495-001 sshd\[22883\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=142.93.174.47
2019-10-05T10:10:37.3867251495-001 sshd\[22883\]: Failed password for invalid user Haslo_1@3 from 142.93.174.47 port 33646 ssh2
2019-10-05T10:13:56.1647041495-001 sshd\[23126\]: Invalid user Welcome2019 from 142.93.174.47 port 42642
2019-10-05T10:13:56.1718741495-001 sshd\[23126\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=142.93.174.47
2019-10-05T10:13:58.3535101495-001 sshd\[23126\]: Failed password for invalid user Welcome2019 from 142.93.174.47 port 42642 ssh2
...

Oct  5 18:02:52 www5 sshd\[28088\]: Invalid user Salve2017 from 45.40.199.87
Oct  5 18:02:52 www5 sshd\[28088\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=45.40.199.87
Oct  5 18:02:54 www5 sshd\[28088\]: Failed password for invalid user Salve2017 from 45.40.199.87 port 47180 ssh2
...

Oct  5 15:40:29 dev0-dcfr-rnet sshd[4733]: Failed password for root from 187.0.221.222 port 28235 ssh2
Oct  5 15:45:42 dev0-dcfr-rnet sshd[4744]: Failed password for root from 187.0.221.222 port 48549 ssh2

[SatOct0513:33:55.6581612019][:error][pid11076:tid46955184039680][client186.95.186.155:50531][client186.95.186.155]ModSecurity:Accessdeniedwithcode403\(phase2\).Matchof"rx\(MSWebServicesClientProtocol\|WormlyBot\|webauth@cmcm\\\\\\\\.com\)"against"REQUEST_HEADERS:user-agent"required.[file"/usr/local/apache.ea3/conf/modsec_rules/20_asl_useragents.conf"][line"395"][id"397989"][rev"1"][msg"Atomicorp.comWAFRules:MSIE6.0detected\(DisableifyouwanttoallowMSIE6\)"][severity"WARNING"][hostname"148.251.104.80"][uri"/public/index.php"][unique_id"XZh-o9p5TuYoNtR1NxLRfgAAAUM"][SatOct0513:35:52.2806162019][:error][pid11298:tid46955188242176][client186.95.186.155:63131][client186.95.186.155]ModSecurity:Accessdeniedwithcode403\(phase2\).Matchof"rx\(MSWebServicesClientProtocol\|WormlyBot\|webauth@cmcm\\\\\\\\.com\)"against"REQUEST_HEADERS:user-agent"required.[file"/usr/local/apache.ea3/conf/modsec_rules/20_asl_useragents.conf"][line"395"][id"397989"][rev"1"][msg"Atomicorp.comWAFRules:MSIE6.0

2019-10-05T15:26:02.285805abusebot-6.cloudsearch.cf sshd\[17231\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=58.ip-51-255-35.eu  user=root

Oct  5 01:49:57 wbs sshd\[17252\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.215.130  user=root
Oct  5 01:49:59 wbs sshd\[17252\]: Failed password for root from 106.12.215.130 port 33110 ssh2
Oct  5 01:54:42 wbs sshd\[17676\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.215.130  user=root
Oct  5 01:54:44 wbs sshd\[17676\]: Failed password for root from 106.12.215.130 port 39356 ssh2
Oct  5 01:59:31 wbs sshd\[18075\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.12.215.130  user=root

2019-10-05T10:55:48.7523921495-001 sshd\[25743\]: Failed password for invalid user Paris@2016 from 202.67.15.106 port 40542 ssh2
2019-10-05T11:06:09.4619511495-001 sshd\[26387\]: Invalid user abc2017 from 202.67.15.106 port 56906
2019-10-05T11:06:09.4651511495-001 sshd\[26387\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=202.67.15.106
2019-10-05T11:06:11.0887471495-001 sshd\[26387\]: Failed password for invalid user abc2017 from 202.67.15.106 port 56906 ssh2
2019-10-05T11:11:26.2612271495-001 sshd\[26709\]: Invalid user Amazon123 from 202.67.15.106 port 51002
2019-10-05T11:11:26.2697981495-001 sshd\[26709\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=202.67.15.106
...

Oct  5 15:57:56 vmanager6029 sshd\[23477\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.16.115.130  user=root
Oct  5 15:57:57 vmanager6029 sshd\[23477\]: Failed password for root from 182.16.115.130 port 60908 ssh2
Oct  5 16:02:37 vmanager6029 sshd\[23581\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.16.115.130  user=root