2020-09-09T05:00:16.807067suse-nuc sshd[28705]: User root from 165.22.49.219 not allowed because listed in DenyUsers
...

...

Repeated brute force against a port

Invalid user lupdate from 165.22.49.42 port 32810

Oct 12 10:04:58 abendstille sshd\[19540\]: Invalid user durai from 165.22.49.42
Oct 12 10:04:58 abendstille sshd\[19540\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.42
Oct 12 10:05:01 abendstille sshd\[19540\]: Failed password for invalid user durai from 165.22.49.42 port 43038 ssh2
Oct 12 10:07:06 abendstille sshd\[22080\]: Invalid user administracao from 165.22.49.42
Oct 12 10:07:06 abendstille sshd\[22080\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.42
...

Banned for a week because repeated abuses, for example SSH, but not only

2020-10-08T16:49:59.538154hostname sshd[10485]: Failed password for root from 165.22.49.42 port 32980 ssh2
2020-10-08T16:53:50.811664hostname sshd[12011]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.42  user=root
2020-10-08T16:53:53.308876hostname sshd[12011]: Failed password for root from 165.22.49.42 port 35762 ssh2
...

Sep  7 18:15:14 ovpn sshd\[6970\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.205  user=root
Sep  7 18:15:17 ovpn sshd\[6970\]: Failed password for root from 165.22.49.205 port 49044 ssh2
Sep  7 18:24:39 ovpn sshd\[9261\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.205  user=root
Sep  7 18:24:41 ovpn sshd\[9261\]: Failed password for root from 165.22.49.205 port 49030 ssh2
Sep  7 18:28:52 ovpn sshd\[10302\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.205  user=root

2020-09-07T05:50:36.1384161495-001 sshd[59011]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.205  user=mysql
2020-09-07T05:50:37.9940741495-001 sshd[59011]: Failed password for mysql from 165.22.49.205 port 42060 ssh2
2020-09-07T05:53:11.7968251495-001 sshd[59234]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.205  user=root
2020-09-07T05:53:13.5973421495-001 sshd[59234]: Failed password for root from 165.22.49.205 port 49810 ssh2
2020-09-07T05:55:53.9024311495-001 sshd[59430]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.205  user=root
2020-09-07T05:55:55.9437711495-001 sshd[59430]: Failed password for root from 165.22.49.205 port 57554 ssh2
...

$f2bV_matches

Aug 29 11:45:45 ns3164893 sshd[22762]: Failed password for root from 165.22.49.205 port 48586 ssh2
Aug 29 11:50:12 ns3164893 sshd[22888]: Invalid user transfer from 165.22.49.205 port 56454
...

(sshd) Failed SSH login from 165.22.49.42 (SG/Singapore/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SSHD; Logs: Aug 28 19:30:57 grace sshd[12438]: Invalid user ia from 165.22.49.42 port 53192
Aug 28 19:30:58 grace sshd[12438]: Failed password for invalid user ia from 165.22.49.42 port 53192 ssh2
Aug 28 19:43:02 grace sshd[13700]: Invalid user lcm from 165.22.49.42 port 52488
Aug 28 19:43:04 grace sshd[13700]: Failed password for invalid user lcm from 165.22.49.42 port 52488 ssh2
Aug 28 19:46:36 grace sshd[14137]: Invalid user developer from 165.22.49.42 port 49976

Aug 27 22:51:59 xxx sshd[27485]: Failed password for r.r from 165.22.49.205 port 51866 ssh2
Aug 27 22:52:00 xxx sshd[27485]: Received disconnect from 165.22.49.205 port 51866:11: Bye Bye [preauth]
Aug 27 22:52:00 xxx sshd[27485]: Disconnected from 165.22.49.205 port 51866 [preauth]
Aug 27 23:07:18 xxx sshd[30446]: Invalid user king from 165.22.49.205 port 39910
Aug 27 23:07:18 xxx sshd[30446]: Failed password for invalid user king from 165.22.49.205 port 39910 ssh2
Aug 27 23:07:18 xxx sshd[30446]: Received disconnect from 165.22.49.205 port 39910:11: Bye Bye [preauth]
Aug 27 23:07:18 xxx sshd[30446]: Disconnected from 165.22.49.205 port 39910 [preauth]


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=165.22.49.205

Time:     Sun Aug 23 22:51:37 2020 +0000
IP:       165.22.49.42 (SG/Singapore/-)
Failures: 5 (sshd)
Interval: 3600 seconds
Blocked:  Permanent Block [LF_SSHD]

Log entries:

Aug 23 22:47:16 ca-1-ams1 sshd[20470]: Invalid user abc123 from 165.22.49.42 port 37280
Aug 23 22:47:18 ca-1-ams1 sshd[20470]: Failed password for invalid user abc123 from 165.22.49.42 port 37280 ssh2
Aug 23 22:50:28 ca-1-ams1 sshd[20557]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.42  user=root
Aug 23 22:50:30 ca-1-ams1 sshd[20557]: Failed password for root from 165.22.49.42 port 46150 ssh2
Aug 23 22:51:36 ca-1-ams1 sshd[20593]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.42  user=root

Aug  3 23:50:26 journals sshd\[89278\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.42  user=root
Aug  3 23:50:28 journals sshd\[89278\]: Failed password for root from 165.22.49.42 port 58752 ssh2
Aug  3 23:54:39 journals sshd\[89730\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.42  user=root
Aug  3 23:54:40 journals sshd\[89730\]: Failed password for root from 165.22.49.42 port 43574 ssh2
Aug  3 23:58:59 journals sshd\[90176\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.42  user=root
...

2020-07-29T15:46:14.319340server.mjenks.net sshd[14388]: Invalid user mpcheng from 165.22.49.42 port 37598
2020-07-29T15:46:14.325197server.mjenks.net sshd[14388]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.42
2020-07-29T15:46:14.319340server.mjenks.net sshd[14388]: Invalid user mpcheng from 165.22.49.42 port 37598
2020-07-29T15:46:16.328441server.mjenks.net sshd[14388]: Failed password for invalid user mpcheng from 165.22.49.42 port 37598 ssh2
2020-07-29T15:50:26.458832server.mjenks.net sshd[14862]: Invalid user dell from 165.22.49.42 port 50066
...

$f2bV_matches

Jul 24 15:58:01 h2779839 sshd[14309]: Invalid user webuser from 165.22.49.42 port 49426
Jul 24 15:58:01 h2779839 sshd[14309]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.42
Jul 24 15:58:01 h2779839 sshd[14309]: Invalid user webuser from 165.22.49.42 port 49426
Jul 24 15:58:03 h2779839 sshd[14309]: Failed password for invalid user webuser from 165.22.49.42 port 49426 ssh2
Jul 24 16:01:04 h2779839 sshd[14366]: Invalid user sysadmin from 165.22.49.42 port 36948
Jul 24 16:01:04 h2779839 sshd[14366]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=165.22.49.42
Jul 24 16:01:04 h2779839 sshd[14366]: Invalid user sysadmin from 165.22.49.42 port 36948
Jul 24 16:01:05 h2779839 sshd[14366]: Failed password for invalid user sysadmin from 165.22.49.42 port 36948 ssh2
Jul 24 16:04:10 h2779839 sshd[14492]: Invalid user jv from 165.22.49.42 port 52704
...

SSH brutforce

" "

Trying out my SMTP servers:
Out: 220 ,In:  EHLO ylmf-pc, Out: 503 5.5.1 Error: authentication not enabled, Out: 421 4.4.2 Error: timeout exceeded

Dec 19 09:49:44 linuxvps sshd\[27273\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.28.228.84  user=root
Dec 19 09:49:46 linuxvps sshd\[27273\]: Failed password for root from 159.28.228.84 port 56426 ssh2
Dec 19 09:53:38 linuxvps sshd\[29790\]: Invalid user franki from 159.28.228.84
Dec 19 09:53:38 linuxvps sshd\[29790\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=159.28.228.84
Dec 19 09:53:39 linuxvps sshd\[29790\]: Failed password for invalid user franki from 159.28.228.84 port 38684 ssh2

Dec 19 05:46:36 sachi sshd\[31355\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.80.65  user=mysql
Dec 19 05:46:39 sachi sshd\[31355\]: Failed password for mysql from 139.59.80.65 port 44036 ssh2
Dec 19 05:52:44 sachi sshd\[31933\]: Invalid user roloff from 139.59.80.65
Dec 19 05:52:44 sachi sshd\[31933\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=139.59.80.65
Dec 19 05:52:47 sachi sshd\[31933\]: Failed password for invalid user roloff from 139.59.80.65 port 54550 ssh2

Dec 19 16:40:09 grey postfix/smtpd\[24642\]: NOQUEUE: reject: RCPT from unknown\[91.232.96.30\]: 554 5.7.1 Service unavailable\; Client host \[91.232.96.30\] blocked using truncate.gbudb.net\; http://www.gbudb.com/truncate/ \[91.232.96.30\]\; from=\ to=\ proto=ESMTP helo=\
...

Dec 19 15:41:13 124388 sshd[24180]: Invalid user admin from 46.105.112.107 port 33592
Dec 19 15:41:13 124388 sshd[24180]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.105.112.107
Dec 19 15:41:13 124388 sshd[24180]: Invalid user admin from 46.105.112.107 port 33592
Dec 19 15:41:15 124388 sshd[24180]: Failed password for invalid user admin from 46.105.112.107 port 33592 ssh2
Dec 19 15:46:09 124388 sshd[24243]: Invalid user floyd from 46.105.112.107 port 39706

firewall-block, port(s): 3520/tcp, 3530/tcp, 3531/tcp, 3534/tcp, 3535/tcp, 3544/tcp, 3546/tcp, 3547/tcp

1576766276 - 12/19/2019 15:37:56 Host: 180.247.78.202/180.247.78.202 Port: 445 TCP Blocked

Invalid user 123456 from 79.137.86.205 port 55660
pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=79.137.86.205
Failed password for invalid user 123456 from 79.137.86.205 port 55660 ssh2
Invalid user Castromonte from 79.137.86.205 port 34900
pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=79.137.86.205

Dec 19 21:03:20 gw1 sshd[27131]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=118.201.65.162
Dec 19 21:03:22 gw1 sshd[27131]: Failed password for invalid user fainecos from 118.201.65.162 port 52334 ssh2
...

Dec 19 15:38:23 grey postfix/smtpd\[13196\]: NOQUEUE: reject: RCPT from unknown\[124.58.105.124\]: 554 5.7.1 Service unavailable\; Client host \[124.58.105.124\] blocked using bl.spamcop.net\; Blocked - see https://www.spamcop.net/bl.shtml\?124.58.105.124\; from=\ to=\ proto=ESMTP helo=\<\[124.58.105.124\]\>
...

Dec 19 15:57:00 loxhost sshd\[11809\]: Invalid user jjjjjjjjjj from 120.201.124.158 port 56125
Dec 19 15:57:00 loxhost sshd\[11809\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=120.201.124.158
Dec 19 15:57:02 loxhost sshd\[11809\]: Failed password for invalid user jjjjjjjjjj from 120.201.124.158 port 56125 ssh2
Dec 19 16:06:42 loxhost sshd\[12246\]: Invalid user 123456789 from 120.201.124.158 port 50528
Dec 19 16:06:42 loxhost sshd\[12246\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=120.201.124.158
...

12/19/2019-17:08:02.526373 52.36.131.219 Protocol: 6 SURICATA TLS invalid record/traffic

" "