2019-07-19 18:34:22 SMTP protocol synchronization error (input sent whostnamehout wahostnameing for greeting): rejected connection from H=[106.251.240.130] input="200F001003001"
2019-07-19 18:34:35 SMTP protocol synchronization error (input sent whostnamehout wahostnameing for greeting): rejected connection from H=[106.251.240.130] input="200F001003001"
2019-07-19 18:35:23 SMTP protocol synchronization error (input sent whostnamehout wahostnameing for greeting): rejected connection from H=[106.251.240.130] input="200F001003001"


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=106.251.240.130

2019-07-19T22:13:03.055883ns1.unifynetsol.net webmin\[3629\]: Invalid login as root from 47.204.197.188
2019-07-19T22:13:08.824218ns1.unifynetsol.net webmin\[3630\]: Invalid login as root from 47.204.197.188
2019-07-19T22:13:14.573858ns1.unifynetsol.net webmin\[3631\]: Invalid login as root from 47.204.197.188
2019-07-19T22:13:20.350050ns1.unifynetsol.net webmin\[3637\]: Invalid login as root from 47.204.197.188
2019-07-19T22:13:26.101630ns1.unifynetsol.net webmin\[3643\]: Invalid login as root from 47.204.197.188

Jul 19 15:31:14 plusreed sshd[19805]: Invalid user lanto from 192.99.245.135
...

Jul 19 21:40:05 legacy sshd[20570]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=27.221.81.138
Jul 19 21:40:07 legacy sshd[20570]: Failed password for invalid user support from 27.221.81.138 port 56316 ssh2
Jul 19 21:45:51 legacy sshd[20789]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=27.221.81.138
...

Splunk® : port scan detected:
Jul 19 13:56:35 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=219.129.118.51 DST=104.248.11.191 LEN=40 TOS=0x00 PREC=0x00 TTL=110 ID=256 PROTO=TCP SPT=57726 DPT=33891 WINDOW=16384 RES=0x00 SYN URGP=0

\[2019-07-19 15:47:59\] NOTICE\[20804\] chan_sip.c: Registration from '"4567891"\' failed for '51.38.111.180:8104' - Wrong password
\[2019-07-19 15:47:59\] SECURITY\[20812\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-07-19T15:47:59.985-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="4567891",SessionID="0x7f06f82756a8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/51.38.111.180/8104",Challenge="0eca2408",ReceivedChallenge="0eca2408",ReceivedHash="0ba1200c58901b59abfbc110044e6c53"
\[2019-07-19 15:48:02\] NOTICE\[20804\] chan_sip.c: Registration from '"4567891"\' failed for '51.38.111.180:8042' - Wrong password
\[2019-07-19 15:48:02\] SECURITY\[20812\] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2019-07-19T15:48:02.144-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="4567891",SessionID="0x7f06f801be28",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="I

Jul 19 17:43:48 debian sshd\[8201\]: Invalid user sue from 107.172.3.124 port 44092
Jul 19 17:43:48 debian sshd\[8201\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=107.172.3.124
...

Brute forcing RDP port 3389

Jul 19 19:13:35 MK-Soft-VM7 sshd\[1406\]: Invalid user postgres from 58.175.144.110 port 46106
Jul 19 19:13:35 MK-Soft-VM7 sshd\[1406\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=58.175.144.110
Jul 19 19:13:37 MK-Soft-VM7 sshd\[1406\]: Failed password for invalid user postgres from 58.175.144.110 port 46106 ssh2
...

Jul 19 21:22:10 vpn01 sshd\[24855\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=62.102.148.69  user=root
Jul 19 21:22:12 vpn01 sshd\[24855\]: Failed password for root from 62.102.148.69 port 37179 ssh2
Jul 19 21:22:15 vpn01 sshd\[24855\]: Failed password for root from 62.102.148.69 port 37179 ssh2

2323/tcp 23/tcp 23/tcp
[2019-05-29/07-19]3pkt

2323/tcp 37215/tcp 23/tcp...
[2019-05-23/07-19]17pkt,3pt.(tcp)

DATE:2019-07-19 21:15:26, IP:178.255.112.71, PORT:telnet Telnet brute force auth on honeypot server (honey-neo-dc-bis)

Scanning (more than 2 packets) random ports - tries to find possible vulnerable services

2323/tcp 23/tcp...
[2019-05-20/07-19]7pkt,2pt.(tcp)