Apr 26 15:26:00 lanister sshd[25656]: Invalid user svt from 80.81.0.94
Apr 26 15:26:00 lanister sshd[25656]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=80.81.0.94
Apr 26 15:26:00 lanister sshd[25656]: Invalid user svt from 80.81.0.94
Apr 26 15:26:03 lanister sshd[25656]: Failed password for invalid user svt from 80.81.0.94 port 61944 ssh2

2020-04-26T20:58:27.696592hermes postfix/smtpd[151520]: NOQUEUE: reject: RCPT from unknown[180.107.181.53]: 554 5.7.1 Service unavailable; Client host [180.107.181.53] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/180.107.181.53; from= to= proto=ESMTP helo=
...

SSH bruteforce

(imapd) Failed IMAP login from 183.89.214.10 (TH/Thailand/mx-ll-183.89.214-10.dynamic.3bb.co.th): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: Apr 26 16:28:03 ir1 dovecot[264309]: imap-login: Disconnected (auth failed, 1 attempts in 12 secs): user=, method=PLAIN, rip=183.89.214.10, lip=5.63.12.44, TLS, session=

142.93.46.172 - - [26/Apr/2020:22:17:49 +0200] "GET /wp-login.php HTTP/1.1" 200 1689 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
142.93.46.172 - - [26/Apr/2020:22:17:50 +0200] "POST /wp-login.php HTTP/1.1" 200 1811 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
142.93.46.172 - - [26/Apr/2020:22:17:51 +0200] "GET /wp-login.php HTTP/1.1" 200 1689 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
142.93.46.172 - - [26/Apr/2020:22:17:54 +0200] "POST /wp-login.php HTTP/1.1" 200 1790 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
142.93.46.172 - - [26/Apr/2020:22:17:57 +0200] "GET /wp-login.php HTTP/1.1" 200 1689 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Firefox/62.0"
142.93.46.172 - - [26/Apr/2020:22:17:58 +0200] "POST /wp-login.php HTTP/1.1" 200 1790 "-" "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:62.0) Gecko/20100101 Fir
...

1587933648 - 04/26/2020 22:40:48 Host: 85.254.16.25/85.254.16.25 Port: 445 TCP Blocked

Apr 26 13:58:56 debian-2gb-nbg1-2 kernel: \[10161271.919340\] \[UFW BLOCK\] IN=eth0 OUT= MAC=96:00:00:0e:18:f4:d2:74:7f:6e:37:e3:08:00 SRC=134.122.76.227 DST=195.201.40.59 LEN=40 TOS=0x00 PREC=0x00 TTL=246 ID=31925 PROTO=TCP SPT=40320 DPT=8067 WINDOW=1024 RES=0x00 SYN URGP=0

[2020-04-26 16:40:50] NOTICE[1170][C-000061ff] chan_sip.c: Call from '' (103.145.12.14:58155) to extension '0046213724626' rejected because extension not found in context 'public'.
[2020-04-26 16:40:50] SECURITY[1184] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-04-26T16:40:50.466-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="0046213724626",SessionID="0x7f6c082fee88",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/103.145.12.14/58155",ACLName="no_extension_match"
[2020-04-26 16:40:51] NOTICE[1170][C-00006200] chan_sip.c: Call from '' (103.145.12.14:62527) to extension '0046812111464' rejected because extension not found in context 'public'.
[2020-04-26 16:40:51] SECURITY[1184] res_security_log.c: SecurityEvent="FailedACL",EventTV="2020-04-26T16:40:51.346-0400",Severity="Error",Service="SIP",EventVersion="1",AccountID="0046812111464",SessionID="0x7f6c083b5ae8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/103.145.
...

2020-04-26T20:37:27.749993shield sshd\[8461\]: Invalid user benny from 220.246.88.92 port 51118
2020-04-26T20:37:27.753563shield sshd\[8461\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=n220246088092.netvigator.com
2020-04-26T20:37:29.847118shield sshd\[8461\]: Failed password for invalid user benny from 220.246.88.92 port 51118 ssh2
2020-04-26T20:40:39.887264shield sshd\[9320\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=n220246088092.netvigator.com  user=root
2020-04-26T20:40:42.346101shield sshd\[9320\]: Failed password for root from 220.246.88.92 port 47924 ssh2

Apr 26 22:10:02 ntop sshd[10148]: Invalid user speak from 18.163.79.167 port 54348
Apr 26 22:10:02 ntop sshd[10148]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=18.163.79.167 
Apr 26 22:10:04 ntop sshd[10148]: Failed password for invalid user speak from 18.163.79.167 port 54348 ssh2
Apr 26 22:10:05 ntop sshd[10148]: Received disconnect from 18.163.79.167 port 54348:11: Bye Bye [preauth]
Apr 26 22:10:05 ntop sshd[10148]: Disconnected from invalid user speak 18.163.79.167 port 54348 [preauth]
Apr 26 22:18:18 ntop sshd[12015]: Invalid user node2 from 18.163.79.167 port 60482
Apr 26 22:18:18 ntop sshd[12015]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=18.163.79.167 
Apr 26 22:18:20 ntop sshd[12015]: Failed password for invalid user node2 from 18.163.79.167 port 60482 ssh2
Apr 26 22:18:20 ntop sshd[12015]: Received disconnect from 18.163.79.167 port 60482:11: Bye Bye [preauth]
Apr 26 22:........
-------------------------------

SSH brute-force attempt

(sshd) Failed SSH login from 69.10.48.130 (US/United States/lushcurrent.com): 5 in the last 3600 secs

Apr 27 06:28:26 our-server-hostname sshd[31248]: Failed password for r.r from 35.229.135.250 port 47468 ssh2
Apr 27 06:32:27 our-server-hostname sshd[3437]: Invalid user nagios from 35.229.135.250
Apr 27 06:32:29 our-server-hostname sshd[3437]: Failed password for invalid user nagios from 35.229.135.250 port 53160 ssh2


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=35.229.135.250

Unauthorized connection attempt detected from IP address 175.202.29.187 to port 23

ET DROP Dshield Block Listed Source group 1 - port: 1111 proto: TCP cat: Misc Attack