Aug 25 18:54:29 vps46666688 sshd[7346]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.75
Aug 25 18:54:31 vps46666688 sshd[7346]: Failed password for invalid user test from 51.38.126.75 port 60580 ssh2
...

2020-08-21T20:25:01+0000 Failed SSH Authentication/Brute Force Attack. (Server 6)

"Unauthorized connection attempt on SSHD detected"

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

Aug  7 10:21:10 ovpn sshd\[5636\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.75  user=root
Aug  7 10:21:12 ovpn sshd\[5636\]: Failed password for root from 51.38.126.75 port 55436 ssh2
Aug  7 10:26:31 ovpn sshd\[8303\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.75  user=root
Aug  7 10:26:33 ovpn sshd\[8303\]: Failed password for root from 51.38.126.75 port 44970 ssh2
Aug  7 10:30:07 ovpn sshd\[9979\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.75  user=root

Invalid user user from 51.38.126.75 port 41966

2020-07-18T12:41:17.959667vps773228.ovh.net sshd[7635]: Failed password for invalid user es from 51.38.126.75 port 45848 ssh2
2020-07-18T12:45:30.419382vps773228.ovh.net sshd[7673]: Invalid user kv from 51.38.126.75 port 60812
2020-07-18T12:45:30.442027vps773228.ovh.net sshd[7673]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=75.ip-51-38-126.eu
2020-07-18T12:45:30.419382vps773228.ovh.net sshd[7673]: Invalid user kv from 51.38.126.75 port 60812
2020-07-18T12:45:32.879698vps773228.ovh.net sshd[7673]: Failed password for invalid user kv from 51.38.126.75 port 60812 ssh2
...

2020-07-13T06:45:12+0200 Failed SSH Authentication/Brute Force Attack. (Server 4)

Jul 11 10:42:53 hosting sshd[13904]: Invalid user user from 51.38.126.75 port 41156
...

2020-07-05T14:35:03.687017sorsha.thespaminator.com sshd[22739]: Invalid user spoj0 from 51.38.126.75 port 37874
2020-07-05T14:35:05.847886sorsha.thespaminator.com sshd[22739]: Failed password for invalid user spoj0 from 51.38.126.75 port 37874 ssh2
...

21 attempts against mh-ssh on water

Jun 24 06:28:11 ns381471 sshd[29277]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.75
Jun 24 06:28:14 ns381471 sshd[29277]: Failed password for invalid user deploy from 51.38.126.75 port 44934 ssh2

Jun 16 12:27:21 serwer sshd\[29325\]: Invalid user k from 51.38.126.75 port 60702
Jun 16 12:27:21 serwer sshd\[29325\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.75
Jun 16 12:27:23 serwer sshd\[29325\]: Failed password for invalid user k from 51.38.126.75 port 60702 ssh2
...

Jun  8 16:16:13 server sshd[20126]: Failed password for root from 51.38.126.75 port 35524 ssh2
Jun  8 16:19:01 server sshd[22199]: Failed password for root from 51.38.126.75 port 51422 ssh2
Jun  8 16:21:50 server sshd[24961]: Failed password for root from 51.38.126.75 port 39084 ssh2

SSH auth scanning - multiple failed logins

Jun  3 06:49:51 [host] sshd[8247]: pam_unix(sshd:a
Jun  3 06:49:53 [host] sshd[8247]: Failed password
Jun  3 06:51:28 [host] sshd[8316]: pam_unix(sshd:a

May 21 23:13:37 abendstille sshd\[16471\]: Invalid user aix from 51.38.126.75
May 21 23:13:37 abendstille sshd\[16471\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.75
May 21 23:13:40 abendstille sshd\[16471\]: Failed password for invalid user aix from 51.38.126.75 port 56962 ssh2
May 21 23:18:33 abendstille sshd\[21369\]: Invalid user ych from 51.38.126.75
May 21 23:18:33 abendstille sshd\[21369\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.75
...

Jul 26 12:02:33 124388 sshd[29031]: Invalid user eti from 51.38.126.92 port 40460
Jul 26 12:02:33 124388 sshd[29031]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.92
Jul 26 12:02:33 124388 sshd[29031]: Invalid user eti from 51.38.126.92 port 40460
Jul 26 12:02:35 124388 sshd[29031]: Failed password for invalid user eti from 51.38.126.92 port 40460 ssh2
Jul 26 12:06:08 124388 sshd[29167]: Invalid user chart from 51.38.126.92 port 48904

Invalid user user from 51.38.126.92 port 36512

Jul 14 20:41:43 inter-technics sshd[25715]: Invalid user ct from 51.38.126.92 port 54158
Jul 14 20:41:43 inter-technics sshd[25715]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.92
Jul 14 20:41:43 inter-technics sshd[25715]: Invalid user ct from 51.38.126.92 port 54158
Jul 14 20:41:44 inter-technics sshd[25715]: Failed password for invalid user ct from 51.38.126.92 port 54158 ssh2
Jul 14 20:44:47 inter-technics sshd[25932]: Invalid user zhangyl from 51.38.126.92 port 50698
...

20 attempts against mh-ssh on pluto

Jul  4 10:20:42 rancher-0 sshd[123876]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.92  user=root
Jul  4 10:20:44 rancher-0 sshd[123876]: Failed password for root from 51.38.126.92 port 42300 ssh2
...

Jun 21 05:46:31 ws26vmsma01 sshd[87444]: Failed password for root from 51.38.126.92 port 47072 ssh2
Jun 21 06:00:34 ws26vmsma01 sshd[106367]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.92
...

Jun  8 10:55:57 *** sshd[24874]: User root from 51.38.126.92 not allowed because not listed in AllowUsers

Unauthorised connection attempt detected at AUO NODE 4. System is sshd. Protected by AUO Stack Web Application Firewall (WAF)

$f2bV_matches

2020-05-21T12:56:03.745481vivaldi2.tree2.info sshd[16899]: Invalid user jpj from 51.38.126.92
2020-05-21T12:56:03.761660vivaldi2.tree2.info sshd[16899]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=92.ip-51-38-126.eu
2020-05-21T12:56:03.745481vivaldi2.tree2.info sshd[16899]: Invalid user jpj from 51.38.126.92
2020-05-21T12:56:05.415247vivaldi2.tree2.info sshd[16899]: Failed password for invalid user jpj from 51.38.126.92 port 51260 ssh2
2020-05-21T12:59:42.981437vivaldi2.tree2.info sshd[17090]: Invalid user adl from 51.38.126.92
...

2020-05-07T14:04:10.925184vivaldi2.tree2.info sshd[5946]: Invalid user rick from 51.38.126.92
2020-05-07T14:04:10.936934vivaldi2.tree2.info sshd[5946]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=92.ip-51-38-126.eu
2020-05-07T14:04:10.925184vivaldi2.tree2.info sshd[5946]: Invalid user rick from 51.38.126.92
2020-05-07T14:04:13.321232vivaldi2.tree2.info sshd[5946]: Failed password for invalid user rick from 51.38.126.92 port 56222 ssh2
2020-05-07T14:07:52.283020vivaldi2.tree2.info sshd[6079]: Invalid user denis from 51.38.126.92
...

Apr 28 15:23:54 [host] sshd[10712]: Invalid user t
Apr 28 15:23:54 [host] sshd[10712]: pam_unix(sshd:
Apr 28 15:23:56 [host] sshd[10712]: Failed passwor

Apr 21 18:50:05 ns381471 sshd[17192]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.126.92
Apr 21 18:50:07 ns381471 sshd[17192]: Failed password for invalid user xml from 51.38.126.92 port 33886 ssh2

Apr 13 06:11:58 host sshd[16209]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=92.ip-51-38-126.eu  user=root
Apr 13 06:12:00 host sshd[16209]: Failed password for root from 51.38.126.92 port 35692 ssh2
...

2020-04-10T17:47:20.478700abusebot-7.cloudsearch.cf sshd[28283]: Invalid user ftpusr from 51.38.126.92 port 36672
2020-04-10T17:47:20.482862abusebot-7.cloudsearch.cf sshd[28283]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=92.ip-51-38-126.eu
2020-04-10T17:47:20.478700abusebot-7.cloudsearch.cf sshd[28283]: Invalid user ftpusr from 51.38.126.92 port 36672
2020-04-10T17:47:23.061097abusebot-7.cloudsearch.cf sshd[28283]: Failed password for invalid user ftpusr from 51.38.126.92 port 36672 ssh2
2020-04-10T17:50:42.028182abusebot-7.cloudsearch.cf sshd[28646]: Invalid user steam from 51.38.126.92 port 44328
2020-04-10T17:50:42.032632abusebot-7.cloudsearch.cf sshd[28646]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=92.ip-51-38-126.eu
2020-04-10T17:50:42.028182abusebot-7.cloudsearch.cf sshd[28646]: Invalid user steam from 51.38.126.92 port 44328
2020-04-10T17:50:43.838547abusebot-7.cloudsearch.cf sshd[28646]
...

SSH login attempts brute force.

2020-02-17 00:52:32 dovecot_login authenticator failed for \(User\) \[92.118.38.57\]: 535 Incorrect authentication data \(set_id=athena@no-server.de\)
2020-02-17 00:52:33 dovecot_login authenticator failed for \(User\) \[92.118.38.57\]: 535 Incorrect authentication data \(set_id=athena@no-server.de\)
2020-02-17 00:52:38 dovecot_login authenticator failed for \(User\) \[92.118.38.57\]: 535 Incorrect authentication data \(set_id=athena@no-server.de\)
2020-02-17 00:52:41 dovecot_login authenticator failed for \(User\) \[92.118.38.57\]: 535 Incorrect authentication data \(set_id=athena@no-server.de\)
2020-02-17 00:53:03 dovecot_login authenticator failed for \(User\) \[92.118.38.57\]: 535 Incorrect authentication data \(set_id=athenaea@no-server.de\)
...

20/2/16@17:53:31: FAIL: Alarm-Network address from=49.145.108.60
...

1581891992 - 02/16/2020 23:26:32 Host: 209.203.47.33/209.203.47.33 Port: 445 TCP Blocked

ssh intrusion attempt

Feb 16 12:58:40 auw2 sshd\[19998\]: Invalid user andre from 49.235.243.246
Feb 16 12:58:40 auw2 sshd\[19998\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.235.243.246
Feb 16 12:58:42 auw2 sshd\[19998\]: Failed password for invalid user andre from 49.235.243.246 port 39958 ssh2
Feb 16 13:02:16 auw2 sshd\[20370\]: Invalid user jsclient from 49.235.243.246
Feb 16 13:02:16 auw2 sshd\[20370\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.235.243.246

Feb 17 00:15:58 serwer sshd\[15432\]: Invalid user client from 192.241.249.19 port 44457
Feb 17 00:15:58 serwer sshd\[15432\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=192.241.249.19
Feb 17 00:16:00 serwer sshd\[15432\]: Failed password for invalid user client from 192.241.249.19 port 44457 ssh2
...

Feb 16 22:21:35 server sshd\[1680\]: Invalid user master from 188.120.227.119
Feb 16 22:21:35 server sshd\[1680\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=kirix820.fvds.ru 
Feb 16 22:21:37 server sshd\[1680\]: Failed password for invalid user master from 188.120.227.119 port 40958 ssh2
Feb 17 01:44:54 server sshd\[6387\]: Invalid user baldwin from 188.120.227.119
Feb 17 01:44:54 server sshd\[6387\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=kirix820.fvds.ru 
...

Feb 16 23:26:28  sshd[22240]: Failed password for invalid user eric from 177.69.104.168 port 42945 ssh2

Feb 17 00:24:47 sd-53420 sshd\[20824\]: Invalid user testftp from 178.128.86.127
Feb 17 00:24:47 sd-53420 sshd\[20824\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.128.86.127
Feb 17 00:24:49 sd-53420 sshd\[20824\]: Failed password for invalid user testftp from 178.128.86.127 port 57874 ssh2
Feb 17 00:27:58 sd-53420 sshd\[21088\]: Invalid user sshuser from 178.128.86.127
Feb 17 00:27:58 sd-53420 sshd\[21088\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.128.86.127
...

port scan and connect, tcp 1433 (ms-sql-s)

Feb 16 13:37:52 hpm sshd\[4926\]: Invalid user teamspeak3 from 51.15.41.165
Feb 16 13:37:52 hpm sshd\[4926\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.15.41.165
Feb 16 13:37:55 hpm sshd\[4926\]: Failed password for invalid user teamspeak3 from 51.15.41.165 port 52438 ssh2
Feb 16 13:40:59 hpm sshd\[5495\]: Invalid user student from 51.15.41.165
Feb 16 13:40:59 hpm sshd\[5495\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.15.41.165

trying to access non-authorized port

MultiHost/MultiPort Probe, Scan, Hack -

Feb 16 18:33:02 plusreed sshd[20871]: Invalid user hcat123 from 118.89.237.20
...