Sep 21 13:04:33 XXXXXX sshd[3460]: Invalid user taskctl from 180.71.58.82 port 36365

$f2bV_matches

Sep 21 14:48:31 prod4 sshd\[2325\]: Address 118.128.190.153 maps to www.ksae.org, but this does not map back to the address - POSSIBLE BREAK-IN ATTEMPT!
Sep 21 14:48:31 prod4 sshd\[2325\]: Invalid user elastic from 118.128.190.153
Sep 21 14:48:32 prod4 sshd\[2325\]: Failed password for invalid user elastic from 118.128.190.153 port 53494 ssh2
...

(sshd) Failed SSH login from 46.41.138.43 (PL/Poland/-): 5 in the last 3600 secs; Ports: *; Direction: inout; Trigger: LF_SSHD; Logs: Sep 21 13:08:23 server sshd[30988]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.41.138.43  user=root
Sep 21 13:08:25 server sshd[30988]: Failed password for root from 46.41.138.43 port 49592 ssh2
Sep 21 13:18:40 server sshd[2048]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=46.41.138.43  user=root
Sep 21 13:18:42 server sshd[2048]: Failed password for root from 46.41.138.43 port 43666 ssh2
Sep 21 13:23:03 server sshd[3660]: Invalid user vboxuser from 46.41.138.43 port 49070

Sep 21 18:48:32 Ubuntu-1404-trusty-64-minimal sshd\[14098\]: Invalid user jenkins from 109.244.99.21
Sep 21 18:48:32 Ubuntu-1404-trusty-64-minimal sshd\[14098\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=109.244.99.21
Sep 21 18:48:34 Ubuntu-1404-trusty-64-minimal sshd\[14098\]: Failed password for invalid user jenkins from 109.244.99.21 port 52088 ssh2
Sep 21 18:53:08 Ubuntu-1404-trusty-64-minimal sshd\[16815\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=109.244.99.21  user=root
Sep 21 18:53:10 Ubuntu-1404-trusty-64-minimal sshd\[16815\]: Failed password for root from 109.244.99.21 port 35646 ssh2

SSH Brute Force

Sep 21 19:06:22 eventyay sshd[27730]: Failed password for root from 218.92.0.248 port 40636 ssh2
Sep 21 19:06:38 eventyay sshd[27730]: error: maximum authentication attempts exceeded for root from 218.92.0.248 port 40636 ssh2 [preauth]
Sep 21 19:06:56 eventyay sshd[27738]: Failed password for root from 218.92.0.248 port 21312 ssh2
...

Telnet/23 MH Probe, Scan, BF, Hack -

Sep 20 18:59:41 mellenthin postfix/smtpd[11972]: NOQUEUE: reject: RCPT from unknown[132.157.128.215]: 554 5.7.1 Service unavailable; Client host [132.157.128.215] blocked using zen.spamhaus.org; https://www.spamhaus.org/query/ip/132.157.128.215; from= to= proto=ESMTP helo=<[132.157.128.215]>

Sep 20 13:50:20 firewall sshd[25810]: Invalid user aqwzsx from 223.70.163.82
Sep 20 13:50:22 firewall sshd[25810]: Failed password for invalid user aqwzsx from 223.70.163.82 port 61447 ssh2
Sep 20 13:59:34 firewall sshd[26038]: Invalid user A1234567890 from 223.70.163.82
...

2020-09-21T12:21:55.049724yoshi.linuxbox.ninja sshd[100880]: Failed password for invalid user admin from 41.90.105.202 port 57472 ssh2
2020-09-21T12:26:43.657722yoshi.linuxbox.ninja sshd[103815]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=41.90.105.202  user=root
2020-09-21T12:26:45.869091yoshi.linuxbox.ninja sshd[103815]: Failed password for root from 41.90.105.202 port 39168 ssh2
...

2020-09-21 20:45:57 dovecot_login authenticator failed for (smd-m.ru) [185.234.219.228]: 535 Incorrect authentication data (set_id=admin@smd-m.ru)
...

Brute force attempt

Sep 21 09:30:10 dignus sshd[3189]: Failed password for root from 175.213.185.129 port 60974 ssh2
Sep 21 09:31:32 dignus sshd[3375]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=175.213.185.129  user=root
Sep 21 09:31:33 dignus sshd[3375]: Failed password for root from 175.213.185.129 port 44426 ssh2
Sep 21 09:32:51 dignus sshd[3629]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=175.213.185.129  user=root
Sep 21 09:32:53 dignus sshd[3629]: Failed password for root from 175.213.185.129 port 56094 ssh2
...

RDP Bruteforce