Apr  8 05:48:07 mail.srvfarm.net postfix/smtpd[1615437]: NOQUEUE: reject: RCPT from unknown[119.18.154.196]: 554 5.7.1 Service unavailable; Client host [119.18.154.196] blocked using bl.spamcop.net; Blocked - see https://www.spamcop.net/bl.shtml?119.18.154.196; from= to= proto=ESMTP helo=
Apr  8 05:48:09 mail.srvfarm.net postfix/smtpd[1615437]: NOQUEUE: reject: RCPT from unknown[119.18.154.196]: 554 5.7.1 Service unavailable; Client host [119.18.154.196] blocked using bl.spamcop.net; Blocked - see https://www.spamcop.net/bl.shtml?119.18.154.196; from= to= proto=ESMTP helo=
Apr  8 05:48:12 mail.srvfarm.net postfix/smtpd[1615437]: NOQUEUE: reject: RCPT from unknown[119.18.154.196]: 554 5.7.1 Service unavailable; Client host [119.18.154.196] blocked using bl.spamcop.net; Blocked - see https://www.spamcop.net/bl.shtml?119.18.154.196; from= to= proto=E

Unauthorized connection attempt detected from IP address 119.18.154.170 to port 80 [J]

proto=tcp  .  spt=35122  .  dpt=25  .     (Found on   Blocklist de  Dec 03)     (322)

2019-11-26 00:29:08 H=(ip-154-194.jlm.net.id) [119.18.154.196]:52812 I=[192.147.25.65]:25 F= rejected RCPT : RBL: found in thrukfz5b56tq6xao6odgdyjrq.zen.dq.spamhaus.net (127.0.0.3, 127.0.0.4) (https://www.spamhaus.org/sbl/query/SBLCSS)
2019-11-26 00:29:09 H=(ip-154-194.jlm.net.id) [119.18.154.196]:52812 I=[192.147.25.65]:25 F= rejected RCPT : RBL: found in thrukfz5b56tq6xao6odgdyjrq.zen.dq.spamhaus.net (127.0.0.4, 127.0.0.3) (https://www.spamhaus.org/sbl/query/SBLCSS)
2019-11-26 00:29:10 H=(ip-154-194.jlm.net.id) [119.18.154.196]:52812 I=[192.147.25.65]:25 F= rejected RCPT : RBL: found in thrukfz5b56tq6xao6odgdyjrq.zen.dq.spamhaus.net (127.0.0.3, 127.0.0.4) (https://www.spamhaus.org/sbl/query/SBLCSS)
...

Oct 12 09:44:09 our-server-hostname postfix/smtpd[24780]: connect from unknown[119.18.154.196]
Oct x@x
Oct x@x
Oct x@x
Oct x@x
Oct 12 09:44:11 our-server-hostname postfix/smtpd[24780]: lost connection after RCPT from unknown[119.18.154.196]
Oct 12 09:44:11 our-server-hostname postfix/smtpd[24780]: disconnect from unknown[119.18.154.196]
Oct 12 13:32:29 our-server-hostname postfix/smtpd[7948]: connect from unknown[119.18.154.196]
Oct x@x
Oct 12 13:32:31 our-server-hostname postfix/smtpd[7948]: lost connection after RCPT from unknown[119.18.154.196]
Oct 12 13:32:31 our-server-hostname postfix/smtpd[7948]: disconnect from unknown[119.18.154.196]
Oct 12 14:23:39 our-server-hostname postfix/smtpd[4250]: connect from unknown[119.18.154.196]
Oct x@x
Oct x@x
Oct x@x
Oct x@x
Oct x@x
Oct x@x
Oct 12 14:23:48 our-server-hostname postfix/smtpd[4250]: lost connection after RCPT from unknown[119.18.154.196]
Oct 12 14:23:48 our-server-hostname postfix/smtpd[4250]: disconnect from unkno........
-------------------------------

Automated report - ssh fail2ban:
Sep 27 21:36:36 authentication failure 
Sep 27 21:36:38 wrong password, user=admin1, port=44077, ssh2
Sep 27 21:41:13 authentication failure

web-1 [ssh_2] SSH Attack

Unauthorized SSH login attempts

Sep 11 21:59:47 [host] sshd[18644]: Invalid user minecraft from 119.18.154.235
Sep 11 21:59:47 [host] sshd[18644]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=119.18.154.235
Sep 11 21:59:50 [host] sshd[18644]: Failed password for invalid user minecraft from 119.18.154.235 port 33122 ssh2

Sep  9 18:09:51 [host] sshd[17265]: Invalid user fctrserver from 119.18.154.235
Sep  9 18:09:51 [host] sshd[17265]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=119.18.154.235
Sep  9 18:09:53 [host] sshd[17265]: Failed password for invalid user fctrserver from 119.18.154.235 port 45862 ssh2

Aug 30 06:40:05 tdfoods sshd\[20716\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=119.18.154.82  user=root
Aug 30 06:40:07 tdfoods sshd\[20716\]: Failed password for root from 119.18.154.82 port 52612 ssh2
Aug 30 06:45:30 tdfoods sshd\[21137\]: Invalid user neo from 119.18.154.82
Aug 30 06:45:30 tdfoods sshd\[21137\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=119.18.154.82
Aug 30 06:45:32 tdfoods sshd\[21137\]: Failed password for invalid user neo from 119.18.154.82 port 44238 ssh2

Aug 27 12:37:27 php1 sshd\[13351\]: Invalid user tamara from 119.18.154.82
Aug 27 12:37:27 php1 sshd\[13351\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=119.18.154.82
Aug 27 12:37:29 php1 sshd\[13351\]: Failed password for invalid user tamara from 119.18.154.82 port 48608 ssh2
Aug 27 12:42:39 php1 sshd\[13891\]: Invalid user student from 119.18.154.82
Aug 27 12:42:39 php1 sshd\[13891\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=119.18.154.82

Aug 21 17:01:13 mail sshd\[12139\]: Invalid user marjorie from 119.18.154.82 port 46084
Aug 21 17:01:13 mail sshd\[12139\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=119.18.154.82
...

Aug 21 16:49:08 MK-Soft-Root2 sshd\[16730\]: Invalid user invitado from 119.18.154.235 port 53458
Aug 21 16:49:08 MK-Soft-Root2 sshd\[16730\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=119.18.154.235
Aug 21 16:49:10 MK-Soft-Root2 sshd\[16730\]: Failed password for invalid user invitado from 119.18.154.235 port 53458 ssh2
...

Repeated brute force against a port

Jun  7 13:29:35 vlre-nyc-1 sshd\[17950\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.173  user=root
Jun  7 13:29:37 vlre-nyc-1 sshd\[17950\]: Failed password for root from 218.92.0.173 port 22120 ssh2
Jun  7 13:29:40 vlre-nyc-1 sshd\[17950\]: Failed password for root from 218.92.0.173 port 22120 ssh2
Jun  7 13:29:43 vlre-nyc-1 sshd\[17950\]: Failed password for root from 218.92.0.173 port 22120 ssh2
Jun  7 13:29:46 vlre-nyc-1 sshd\[17950\]: Failed password for root from 218.92.0.173 port 22120 ssh2
...

Brute-force attempt banned

2020-06-07T12:08:46.359978homeassistant sshd[12641]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=138.197.129.38  user=root
2020-06-07T12:08:47.824973homeassistant sshd[12641]: Failed password for root from 138.197.129.38 port 57620 ssh2
...

Jun  7 16:12:47 debian kernel: [438126.570195] [UFW BLOCK] IN=eth0 OUT= MAC=52:54:00:be:e4:65:08:e8:4f:6e:48:0c:08:00 SRC=183.136.225.45 DST=89.252.131.35 LEN=44 TOS=0x00 PREC=0x00 TTL=110 ID=15068 PROTO=TCP SPT=8161 DPT=8006 WINDOW=29200 RES=0x00 SYN URGP=0

Jun  7 13:21:42 cdc sshd[1490]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.92.0.191  user=root
Jun  7 13:21:43 cdc sshd[1490]: Failed password for invalid user root from 218.92.0.191 port 60974 ssh2

Jun  5 02:35:27 cumulus sshd[12108]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.189.155.12  user=r.r
Jun  5 02:35:29 cumulus sshd[12108]: Failed password for r.r from 5.189.155.12 port 41548 ssh2
Jun  5 02:35:29 cumulus sshd[12108]: Received disconnect from 5.189.155.12 port 41548:11: Bye Bye [preauth]
Jun  5 02:35:29 cumulus sshd[12108]: Disconnected from 5.189.155.12 port 41548 [preauth]
Jun  5 02:49:54 cumulus sshd[13559]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=5.189.155.12  user=r.r
Jun  5 02:49:57 cumulus sshd[13559]: Failed password for r.r from 5.189.155.12 port 54230 ssh2
Jun  5 02:49:57 cumulus sshd[13559]: Received disconnect from 5.189.155.12 port 54230:11: Bye Bye [preauth]
Jun  5 02:49:57 cumulus sshd[13559]: Disconnected from 5.189.155.12 port 54230 [preauth]
Jun  5 02:53:14 cumulus sshd[13881]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 ........
-------------------------------

Lines containing failures of 113.173.239.127
2020-06-07 x@x


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=113.173.239.127

Jun  7 14:15:19 roki sshd[26731]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.83.44.111  user=root
Jun  7 14:15:21 roki sshd[26731]: Failed password for root from 51.83.44.111 port 51930 ssh2
Jun  7 14:24:31 roki sshd[27358]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.83.44.111  user=root
Jun  7 14:24:32 roki sshd[27358]: Failed password for root from 51.83.44.111 port 60344 ssh2
Jun  7 14:27:46 roki sshd[27591]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.83.44.111  user=root
...

Jun  7 14:02:43 amit sshd\[3201\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=196.36.1.106  user=root
Jun  7 14:02:46 amit sshd\[3201\]: Failed password for root from 196.36.1.106 port 43702 ssh2
Jun  7 14:10:23 amit sshd\[14163\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=196.36.1.106  user=root
...

Brute forcing email accounts

Jun  7 15:35:17 mellenthin sshd[27801]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.186.30.76  user=root
Jun  7 15:35:19 mellenthin sshd[27801]: Failed password for invalid user root from 222.186.30.76 port 12822 ssh2

Jun  7 02:00:37 web1 sshd\[21471\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.75.35.150  user=root
Jun  7 02:00:39 web1 sshd\[21471\]: Failed password for root from 106.75.35.150 port 37886 ssh2
Jun  7 02:04:49 web1 sshd\[21982\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.75.35.150  user=root
Jun  7 02:04:51 web1 sshd\[21982\]: Failed password for root from 106.75.35.150 port 56316 ssh2
Jun  7 02:09:04 web1 sshd\[22380\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.75.35.150  user=root

Port Scan detected!
...

Jun  7 10:13:57 firewall sshd[13125]: Failed password for root from 163.172.127.251 port 59166 ssh2
Jun  7 10:17:16 firewall sshd[13221]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=163.172.127.251  user=root
Jun  7 10:17:19 firewall sshd[13221]: Failed password for root from 163.172.127.251 port 33252 ssh2
...

Jun  7 15:04:35 vps639187 sshd\[24489\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=35.223.9.162  user=root
Jun  7 15:04:38 vps639187 sshd\[24489\]: Failed password for root from 35.223.9.162 port 35644 ssh2
Jun  7 15:05:34 vps639187 sshd\[24503\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=35.223.9.162  user=root
...