Jun 27 18:50:40 ip-172-31-61-156 sshd[16728]: Invalid user vikram from 51.91.97.153
Jun 27 18:50:42 ip-172-31-61-156 sshd[16728]: Failed password for invalid user vikram from 51.91.97.153 port 55148 ssh2
Jun 27 18:50:40 ip-172-31-61-156 sshd[16728]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.91.97.153
Jun 27 18:50:40 ip-172-31-61-156 sshd[16728]: Invalid user vikram from 51.91.97.153
Jun 27 18:50:42 ip-172-31-61-156 sshd[16728]: Failed password for invalid user vikram from 51.91.97.153 port 55148 ssh2
...

Bruteforce detected by fail2ban

2020-06-17T10:03:19.629051mail.broermann.family sshd[14877]: Invalid user jacob from 51.91.97.153 port 49574
2020-06-17T10:03:21.822974mail.broermann.family sshd[14877]: Failed password for invalid user jacob from 51.91.97.153 port 49574 ssh2
2020-06-17T10:06:45.714148mail.broermann.family sshd[15168]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=153.ip-51-91-97.eu  user=root
2020-06-17T10:06:47.516053mail.broermann.family sshd[15168]: Failed password for root from 51.91.97.153 port 49474 ssh2
2020-06-17T10:10:00.506185mail.broermann.family sshd[15442]: Invalid user ksl from 51.91.97.153 port 49364
...

Jun 14 15:33:19 srv-ubuntu-dev3 sshd[110837]: Invalid user theforest from 51.91.97.153
Jun 14 15:33:19 srv-ubuntu-dev3 sshd[110837]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.91.97.153
Jun 14 15:33:19 srv-ubuntu-dev3 sshd[110837]: Invalid user theforest from 51.91.97.153
Jun 14 15:33:21 srv-ubuntu-dev3 sshd[110837]: Failed password for invalid user theforest from 51.91.97.153 port 59842 ssh2
Jun 14 15:36:51 srv-ubuntu-dev3 sshd[111457]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.91.97.153  user=root
Jun 14 15:36:53 srv-ubuntu-dev3 sshd[111457]: Failed password for root from 51.91.97.153 port 33668 ssh2
Jun 14 15:40:25 srv-ubuntu-dev3 sshd[111981]: Invalid user redmine from 51.91.97.153
Jun 14 15:40:25 srv-ubuntu-dev3 sshd[111981]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.91.97.153
Jun 14 15:40:25 srv-ubuntu-dev3 sshd[111981]: Invalid user re
...

2020-06-12T06:10:14.234954abusebot-3.cloudsearch.cf sshd[11980]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=153.ip-51-91-97.eu  user=root
2020-06-12T06:10:16.555012abusebot-3.cloudsearch.cf sshd[11980]: Failed password for root from 51.91.97.153 port 35958 ssh2
2020-06-12T06:13:38.226258abusebot-3.cloudsearch.cf sshd[12151]: Invalid user minecraft from 51.91.97.153 port 39338
2020-06-12T06:13:38.232595abusebot-3.cloudsearch.cf sshd[12151]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=153.ip-51-91-97.eu
2020-06-12T06:13:38.226258abusebot-3.cloudsearch.cf sshd[12151]: Invalid user minecraft from 51.91.97.153 port 39338
2020-06-12T06:13:40.557245abusebot-3.cloudsearch.cf sshd[12151]: Failed password for invalid user minecraft from 51.91.97.153 port 39338 ssh2
2020-06-12T06:17:03.899892abusebot-3.cloudsearch.cf sshd[12370]: Invalid user www from 51.91.97.153 port 42736
...

Jun  7 22:38:52 piServer sshd[27289]: Failed password for root from 51.91.97.153 port 37688 ssh2
Jun  7 22:42:20 piServer sshd[27724]: Failed password for root from 51.91.97.153 port 40766 ssh2
...

Jun  2 00:30:03 home sshd[6591]: Failed password for root from 51.91.97.153 port 39942 ssh2
Jun  2 00:33:30 home sshd[7030]: Failed password for root from 51.91.97.153 port 43874 ssh2
...

$f2bV_matches

5x Failed Password

May 11 06:38:35 PorscheCustomer sshd[10561]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.91.97.153
May 11 06:38:37 PorscheCustomer sshd[10561]: Failed password for invalid user plover from 51.91.97.153 port 45442 ssh2
May 11 06:42:23 PorscheCustomer sshd[10743]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.91.97.153
...

Bruteforce detected by fail2ban

$f2bV_matches

Apr 30 07:03:33 ns382633 sshd\[30935\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.91.97.153  user=root
Apr 30 07:03:36 ns382633 sshd\[30935\]: Failed password for root from 51.91.97.153 port 40836 ssh2
Apr 30 07:15:10 ns382633 sshd\[929\]: Invalid user ho from 51.91.97.153 port 37106
Apr 30 07:15:10 ns382633 sshd\[929\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.91.97.153
Apr 30 07:15:12 ns382633 sshd\[929\]: Failed password for invalid user ho from 51.91.97.153 port 37106 ssh2

Lines containing failures of 51.91.97.153 (max 1000)
Apr 28 01:56:42 mxbb sshd[28801]: Invalid user zlc from 51.91.97.153 port 42764
Apr 28 01:56:44 mxbb sshd[28801]: Failed password for invalid user zlc from 51.91.97.153 port 42764 ssh2
Apr 28 01:56:44 mxbb sshd[28801]: Received disconnect from 51.91.97.153 port 42764:11: Bye Bye [preauth]
Apr 28 01:56:44 mxbb sshd[28801]: Disconnected from 51.91.97.153 port 42764 [preauth]
Apr 28 02:07:18 mxbb sshd[29272]: Failed password for r.r from 51.91.97.153 port 34262 ssh2
Apr 28 02:07:18 mxbb sshd[29272]: Received disconnect from 51.91.97.153 port 34262:11: Bye Bye [preauth]
Apr 28 02:07:18 mxbb sshd[29272]: Disconnected from 51.91.97.153 port 34262 [preauth]
Apr 28 02:12:03 mxbb sshd[29452]: Invalid user etq from 51.91.97.153 port 50140
Apr 28 02:12:05 mxbb sshd[29452]: Failed password for invalid user etq from 51.91.97.153 port 50140 ssh2
Apr 28 02:12:05 mxbb sshd[29452]: Received disconnect from 51.91.97.153 port 50140:11: B........
------------------------------

Lines containing failures of 51.91.97.153 (max 1000)
Apr 28 01:56:42 mxbb sshd[28801]: Invalid user zlc from 51.91.97.153 port 42764
Apr 28 01:56:44 mxbb sshd[28801]: Failed password for invalid user zlc from 51.91.97.153 port 42764 ssh2
Apr 28 01:56:44 mxbb sshd[28801]: Received disconnect from 51.91.97.153 port 42764:11: Bye Bye [preauth]
Apr 28 01:56:44 mxbb sshd[28801]: Disconnected from 51.91.97.153 port 42764 [preauth]
Apr 28 02:07:18 mxbb sshd[29272]: Failed password for r.r from 51.91.97.153 port 34262 ssh2
Apr 28 02:07:18 mxbb sshd[29272]: Received disconnect from 51.91.97.153 port 34262:11: Bye Bye [preauth]
Apr 28 02:07:18 mxbb sshd[29272]: Disconnected from 51.91.97.153 port 34262 [preauth]
Apr 28 02:12:03 mxbb sshd[29452]: Invalid user etq from 51.91.97.153 port 50140
Apr 28 02:12:05 mxbb sshd[29452]: Failed password for invalid user etq from 51.91.97.153 port 50140 ssh2
Apr 28 02:12:05 mxbb sshd[29452]: Received disconnect from 51.91.97.153 port 50140:11: B........
------------------------------

Apr 28 16:29:03 vmd26974 sshd[30527]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=45.55.155.72
Apr 28 16:29:05 vmd26974 sshd[30527]: Failed password for invalid user flex from 45.55.155.72 port 32805 ssh2
...

Honeypot attack, port: 445, PTR: b8.de.089f.ip4.static.sl-reverse.com.

2020-04-28T12:19:34.682715shield sshd\[14268\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=123.127.107.70  user=root
2020-04-28T12:19:36.830886shield sshd\[14268\]: Failed password for root from 123.127.107.70 port 40560 ssh2
2020-04-28T12:23:50.436543shield sshd\[15034\]: Invalid user testuser from 123.127.107.70 port 53993
2020-04-28T12:23:50.440172shield sshd\[15034\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=123.127.107.70
2020-04-28T12:23:52.397747shield sshd\[15034\]: Failed password for invalid user testuser from 123.127.107.70 port 53993 ssh2

Lines containing failures of 51.91.97.153 (max 1000)
Apr 28 01:56:42 mxbb sshd[28801]: Invalid user zlc from 51.91.97.153 port 42764
Apr 28 01:56:44 mxbb sshd[28801]: Failed password for invalid user zlc from 51.91.97.153 port 42764 ssh2
Apr 28 01:56:44 mxbb sshd[28801]: Received disconnect from 51.91.97.153 port 42764:11: Bye Bye [preauth]
Apr 28 01:56:44 mxbb sshd[28801]: Disconnected from 51.91.97.153 port 42764 [preauth]
Apr 28 02:07:18 mxbb sshd[29272]: Failed password for r.r from 51.91.97.153 port 34262 ssh2
Apr 28 02:07:18 mxbb sshd[29272]: Received disconnect from 51.91.97.153 port 34262:11: Bye Bye [preauth]
Apr 28 02:07:18 mxbb sshd[29272]: Disconnected from 51.91.97.153 port 34262 [preauth]
Apr 28 02:12:03 mxbb sshd[29452]: Invalid user etq from 51.91.97.153 port 50140
Apr 28 02:12:05 mxbb sshd[29452]: Failed password for invalid user etq from 51.91.97.153 port 50140 ssh2
Apr 28 02:12:05 mxbb sshd[29452]: Received disconnect from 51.91.97.153 port 50140:11: B........
------------------------------

Bruteforce detected by fail2ban

Unauthorized connection attempt detected from IP address 185.108.164.225 to port 8080

Apr 28 14:06:43 server postfix/smtpd[6900]: NOQUEUE: reject: RCPT from unknown[106.110.164.196]: 554 5.7.1 Service unavailable; Client host [106.110.164.196] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/106.110.164.196 / https://www.spamhaus.org/sbl/query/SBLCSS; from= to= proto=SMTP helo=

Honeypot attack, port: 81, PTR: ip-177-76-84-152.user.vivozap.com.br.

Unauthorized connection attempt detected from IP address 198.108.66.161 to port 5903 [T]

Apr 28 13:48:16 mockhub sshd[22283]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=218.149.128.186
Apr 28 13:48:19 mockhub sshd[22283]: Failed password for invalid user patrick from 218.149.128.186 port 35183 ssh2
...

Apr 28 13:49:20 server1 sshd\[4202\]: Failed password for invalid user ocs from 202.152.0.14 port 55230 ssh2
Apr 28 13:52:07 server1 sshd\[5057\]: Invalid user john from 202.152.0.14
Apr 28 13:52:07 server1 sshd\[5057\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=202.152.0.14 
Apr 28 13:52:09 server1 sshd\[5057\]: Failed password for invalid user john from 202.152.0.14 port 58558 ssh2
Apr 28 13:54:48 server1 sshd\[5928\]: Invalid user student from 202.152.0.14
...

Unauthorized connection attempt detected from IP address 189.170.110.122 to port 80

1588075587 - 04/28/2020 14:06:27 Host: 177.19.34.129/177.19.34.129 Port: 445 TCP Blocked

Honeypot attack, port: 445, PTR: PTR record not found

Apr 28 21:15:43 mail sshd[4501]: Invalid user testuser from 59.188.2.19
Apr 28 21:15:43 mail sshd[4501]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=59.188.2.19
Apr 28 21:15:43 mail sshd[4501]: Invalid user testuser from 59.188.2.19
Apr 28 21:15:45 mail sshd[4501]: Failed password for invalid user testuser from 59.188.2.19 port 49803 ssh2
Apr 28 21:22:16 mail sshd[5377]: Invalid user ava from 59.188.2.19
...