(sshd) Failed SSH login from 51.38.230.10 (FR/France/10.ip-51-38-230.eu): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SSHD; Logs: Jun 25 18:26:31 amsweb01 sshd[6900]: Invalid user ubuntu from 51.38.230.10 port 41682
Jun 25 18:26:33 amsweb01 sshd[6900]: Failed password for invalid user ubuntu from 51.38.230.10 port 41682 ssh2
Jun 25 18:29:57 amsweb01 sshd[7410]: Invalid user cyrus from 51.38.230.10 port 40152
Jun 25 18:29:59 amsweb01 sshd[7410]: Failed password for invalid user cyrus from 51.38.230.10 port 40152 ssh2
Jun 25 18:33:23 amsweb01 sshd[8133]: Invalid user tom from 51.38.230.10 port 38622

Jun 22 23:27:00 scw-tender-jepsen sshd[20410]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.10
Jun 22 23:27:02 scw-tender-jepsen sshd[20410]: Failed password for invalid user usuario from 51.38.230.10 port 45968 ssh2

2020-06-11T23:59:15.846760randservbullet-proofcloud-66.localdomain sshd[3553]: Invalid user prashant from 51.38.230.10 port 47066
2020-06-11T23:59:15.850748randservbullet-proofcloud-66.localdomain sshd[3553]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=10.ip-51-38-230.eu
2020-06-11T23:59:15.846760randservbullet-proofcloud-66.localdomain sshd[3553]: Invalid user prashant from 51.38.230.10 port 47066
2020-06-11T23:59:17.398803randservbullet-proofcloud-66.localdomain sshd[3553]: Failed password for invalid user prashant from 51.38.230.10 port 47066 ssh2
...

Jun  7 08:46:34 piServer sshd[15519]: Failed password for root from 51.38.230.10 port 56390 ssh2
Jun  7 08:50:08 piServer sshd[15962]: Failed password for root from 51.38.230.10 port 32828 ssh2
...

May 31 05:25:10 ms-srv sshd[60816]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.10
May 31 05:25:12 ms-srv sshd[60816]: Failed password for invalid user admin from 51.38.230.10 port 36776 ssh2

May 29 00:24:32 mail sshd\[6999\]: Invalid user rdc from 51.38.230.10
May 29 00:24:32 mail sshd\[6999\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.10
...

k+ssh-bruteforce

Apr 29 15:31:06 OPSO sshd\[22494\]: Invalid user zjz from 51.38.230.10 port 40906
Apr 29 15:31:06 OPSO sshd\[22494\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.10
Apr 29 15:31:09 OPSO sshd\[22494\]: Failed password for invalid user zjz from 51.38.230.10 port 40906 ssh2
Apr 29 15:35:02 OPSO sshd\[23590\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.10  user=root
Apr 29 15:35:05 OPSO sshd\[23590\]: Failed password for root from 51.38.230.10 port 52578 ssh2

SSH brute-force: detected 20 distinct usernames within a 24-hour window.

Sep 27 10:14:27 serwer sshd\[26142\]: Invalid user user from 51.38.230.65 port 38688
Sep 27 10:14:27 serwer sshd\[26142\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.65
Sep 27 10:14:28 serwer sshd\[26142\]: Failed password for invalid user user from 51.38.230.65 port 38688 ssh2
Sep 27 10:17:35 serwer sshd\[26477\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.65  user=root
Sep 27 10:17:37 serwer sshd\[26477\]: Failed password for root from 51.38.230.65 port 43774 ssh2
Sep 27 10:19:37 serwer sshd\[26632\]: Invalid user alumni from 51.38.230.65 port 60042
Sep 27 10:19:37 serwer sshd\[26632\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.65
Sep 27 10:19:39 serwer sshd\[26632\]: Failed password for invalid user alumni from 51.38.230.65 port 60042 ssh2
Sep 27 10:21:29 serwer sshd\[26872\]: Invalid user anderson from 51.38.2
...

Time:     Sun Sep 27 00:50:55 2020 +0000
IP:       51.38.230.65 (FR/France/65.ip-51-38-230.eu)
Failures: 5 (sshd)
Interval: 3600 seconds
Blocked:  Permanent Block [LF_SSHD]

Log entries:

Sep 27 00:35:02 29-1 sshd[28634]: Invalid user a from 51.38.230.65 port 43354
Sep 27 00:35:05 29-1 sshd[28634]: Failed password for invalid user a from 51.38.230.65 port 43354 ssh2
Sep 27 00:43:27 29-1 sshd[29871]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.65  user=root
Sep 27 00:43:29 29-1 sshd[29871]: Failed password for root from 51.38.230.65 port 37988 ssh2
Sep 27 00:50:51 29-1 sshd[31093]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.65  user=root

2020-09-28T09:03:59.416667ks3355764 sshd[10389]: Invalid user caixa from 51.38.230.65 port 47834
2020-09-28T09:04:01.723972ks3355764 sshd[10389]: Failed password for invalid user caixa from 51.38.230.65 port 47834 ssh2
...

Aug 31 07:53:16 * sshd[11285]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.65
Aug 31 07:53:18 * sshd[11285]: Failed password for invalid user radio from 51.38.230.65 port 36244 ssh2

SSH invalid-user multiple login try

Unauthorized SSH login attempts

Automatic report - XMLRPC Attack

May 29 09:46:40 vps639187 sshd\[32668\]: Invalid user postgres from 51.38.230.59 port 43646
May 29 09:46:40 vps639187 sshd\[32668\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.59
May 29 09:46:42 vps639187 sshd\[32668\]: Failed password for invalid user postgres from 51.38.230.59 port 43646 ssh2
...

$f2bV_matches | Triggered by Fail2Ban at Vostok web server

May  9 05:49:53 pkdns2 sshd\[38623\]: Invalid user shinken from 51.38.230.59May  9 05:49:54 pkdns2 sshd\[38625\]: Invalid user shinken from 51.38.230.59May  9 05:49:55 pkdns2 sshd\[38625\]: Failed password for invalid user shinken from 51.38.230.59 port 52822 ssh2May  9 05:49:56 pkdns2 sshd\[38623\]: Failed password for invalid user shinken from 51.38.230.59 port 47574 ssh2May  9 05:50:01 pkdns2 sshd\[38640\]: Invalid user shinken from 51.38.230.59May  9 05:50:03 pkdns2 sshd\[38640\]: Failed password for invalid user shinken from 51.38.230.59 port 58062 ssh2
...

Unauthorized connection attempt detected from IP address 51.38.230.5 to port 2220 [J]

Unauthorized connection attempt detected from IP address 51.38.230.5 to port 2220 [J]

Automatic report - SSH Brute-Force Attack

Invalid user roo from 51.38.230.62 port 34150

Jul 28 04:57:25 vtv3 sshd\[423\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.62  user=root
Jul 28 04:57:28 vtv3 sshd\[423\]: Failed password for root from 51.38.230.62 port 52912 ssh2
Jul 28 05:01:36 vtv3 sshd\[2558\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.62  user=root
Jul 28 05:01:38 vtv3 sshd\[2558\]: Failed password for root from 51.38.230.62 port 48694 ssh2
Jul 28 05:05:53 vtv3 sshd\[4557\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.62  user=root
Jul 28 05:18:28 vtv3 sshd\[10293\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.62  user=root
Jul 28 05:18:30 vtv3 sshd\[10293\]: Failed password for root from 51.38.230.62 port 60030 ssh2
Jul 28 05:22:51 vtv3 sshd\[12387\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=51.38.230.62  u

sshd jail - ssh hack attempt

1594179878 - 07/08/2020 05:44:38 Host: 116.97.155.80/116.97.155.80 Port: 445 TCP Blocked

2020-07-08T03:36:00.897353upcloud.m0sh1x2.com sshd[15495]: Invalid user arun from 49.233.139.218 port 52860

Automatic report - Port Scan Attack

Jul  8 07:49:59 ns381471 sshd[8907]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=83.37.0.106
Jul  8 07:50:01 ns381471 sshd[8907]: Failed password for invalid user paulette from 83.37.0.106 port 51300 ssh2

port scan and connect, tcp 80 (http)

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Jul  8 03:44:45 *** sshd[11986]: Invalid user auberta from 122.160.76.224

Jul  8 06:15:02 vps sshd[764300]: Failed password for invalid user physics from 106.54.72.77 port 50036 ssh2
Jul  8 06:18:32 vps sshd[783422]: Invalid user elinor from 106.54.72.77 port 40555
Jul  8 06:18:32 vps sshd[783422]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.54.72.77
Jul  8 06:18:34 vps sshd[783422]: Failed password for invalid user elinor from 106.54.72.77 port 40555 ssh2
Jul  8 06:22:05 vps sshd[802028]: Invalid user lilkim from 106.54.72.77 port 59309
...

(smtpauth) Failed SMTP AUTH login from 45.175.1.206 (BR/Brazil/-): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: 2020-07-08 08:14:27 plain authenticator failed for ([45.175.1.206]) [45.175.1.206]: 535 Incorrect authentication data (set_id=info@sabzroyan.com)

Jul  8 05:48:40 scw-6657dc sshd[6205]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=175.24.46.107
Jul  8 05:48:40 scw-6657dc sshd[6205]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=175.24.46.107
Jul  8 05:48:42 scw-6657dc sshd[6205]: Failed password for invalid user xm from 175.24.46.107 port 45084 ssh2
...

(smtpauth) Failed SMTP AUTH login from 177.21.131.225 (BR/Brazil/-): 1 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_TRIGGER; Logs: 2020-07-08 08:14:35 plain authenticator failed for ([177.21.131.225]) [177.21.131.225]: 535 Incorrect authentication data (set_id=info)

Jul  8 07:18:46 rush sshd[29822]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.141.184.154
Jul  8 07:18:48 rush sshd[29822]: Failed password for invalid user dfl from 182.141.184.154 port 42226 ssh2
Jul  8 07:21:54 rush sshd[29913]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.141.184.154
...

Unauthorized connection attempt detected from IP address 191.239.255.6 to port 23

Unauthorized access or intrusion attempt detected from Thor banned IP