Feb 21 19:08:33 mail sshd\[12487\]: Invalid user taeyoung from 206.81.12.209
Feb 21 19:08:33 mail sshd\[12487\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=206.81.12.209
...

Multiport scan : 4 ports scanned 6378 6379 6380 6381

Feb 21 15:55:26 cumulus sshd[26053]: Invalid user gmodserver from 168.196.42.122 port 45377
Feb 21 15:55:26 cumulus sshd[26053]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=168.196.42.122
Feb 21 15:55:28 cumulus sshd[26053]: Failed password for invalid user gmodserver from 168.196.42.122 port 45377 ssh2
Feb 21 15:55:28 cumulus sshd[26053]: Received disconnect from 168.196.42.122 port 45377:11: Bye Bye [preauth]
Feb 21 15:55:28 cumulus sshd[26053]: Disconnected from 168.196.42.122 port 45377 [preauth]
Feb 21 16:06:52 cumulus sshd[26360]: Invalid user akazam from 168.196.42.122 port 49222
Feb 21 16:06:52 cumulus sshd[26360]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=168.196.42.122
Feb 21 16:06:53 cumulus sshd[26360]: Failed password for invalid user akazam from 168.196.42.122 port 49222 ssh2
Feb 21 16:06:54 cumulus sshd[26360]: Received disconnect from 168.196.42.122 port 49222:11: B........
-------------------------------

Feb 22 00:31:47 MK-Soft-Root1 sshd[6175]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.66.207.67 
Feb 22 00:31:49 MK-Soft-Root1 sshd[6175]: Failed password for invalid user username from 180.66.207.67 port 56762 ssh2
...

IP Ban Report :  
 https://help-dysk.pl/wordpress-firewall-plugins/ip/217.70.186.133/ 
 
 LU - 1H : (1)  
 Protection Against DDoS WordPress plugin :  
 "odzyskiwanie danych help-dysk" 
 IP Address Ranges by Country : LU 
 NAME ASN : ASN29169 
 
 IP : 217.70.186.133 
 
 CIDR : 217.70.186.0/24 
 
 PREFIX COUNT : 22 
 
 UNIQUE IP COUNT : 24832 
 
 
 ATTACKS DETECTED ASN29169 :  
  1H - 1 
  3H - 1 
  6H - 1 
 12H - 1 
 24H - 1 
 
 DateTime : 2020-02-21 22:27:54 
 
 INFO : Server 301 - Looking for resource vulnerabilities Detected and Blocked by ADMIN  - data recovery

Feb 21 18:27:58 firewall sshd[12838]: Invalid user admin from 80.87.66.24
Feb 21 18:28:00 firewall sshd[12838]: Failed password for invalid user admin from 80.87.66.24 port 36970 ssh2
Feb 21 18:28:04 firewall sshd[12842]: Invalid user admin from 80.87.66.24
...

Automatic report - Port Scan Attack

2020-02-21 22:14:52 SMTP protocol synchronization error (input sent whostnamehout wahostnameing for greeting): rejected connection from H=[192.241.222.158] input="EHLO zg0213a-152rn"
2020-02-21 22:15:05 SMTP protocol synchronization error (input sent whostnamehout wahostnameing for greeting): rejected connection from H=[192.241.222.158] input="EHLO zg0213a-152rn"
2020-02-21 22:15:17 SMTP protocol synchronization error (input sent whostnamehout wahostnameing for greeting): rejected connection from H=[192.241.222.158] input="EHLO zg0213a-152rn"


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=192.241.222.158

Feb 21 19:13:48 plusreed sshd[13549]: Invalid user robertparker from 181.52.251.209
...

[2020-02-21 19:06:06] NOTICE[1148] chan_sip.c: Registration from '' failed for '185.147.212.8:52646' - Wrong password
[2020-02-21 19:06:06] SECURITY[1163] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-02-21T19:06:06.410-0500",Severity="Error",Service="SIP",EventVersion="2",AccountID="1470",SessionID="0x7fd82c10acc8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.147.212.8/52646",Challenge="6edaa18e",ReceivedChallenge="6edaa18e",ReceivedHash="2efbf583d88362443215193e28142107"
[2020-02-21 19:06:32] NOTICE[1148] chan_sip.c: Registration from '' failed for '185.147.212.8:64246' - Wrong password
[2020-02-21 19:06:32] SECURITY[1163] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-02-21T19:06:32.790-0500",Severity="Error",Service="SIP",EventVersion="2",AccountID="2579",SessionID="0x7fd82cdc4bd8",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/185.147.212.8
...

Scanning random ports - tries to find possible vulnerable services

$f2bV_matches

Feb 22 01:02:32 dcd-gentoo sshd[15801]: User root from 218.92.0.191 not allowed because none of user's groups are listed in AllowGroups
Feb 22 01:02:34 dcd-gentoo sshd[15801]: error: PAM: Authentication failure for illegal user root from 218.92.0.191
Feb 22 01:02:32 dcd-gentoo sshd[15801]: User root from 218.92.0.191 not allowed because none of user's groups are listed in AllowGroups
Feb 22 01:02:34 dcd-gentoo sshd[15801]: error: PAM: Authentication failure for illegal user root from 218.92.0.191
Feb 22 01:02:32 dcd-gentoo sshd[15801]: User root from 218.92.0.191 not allowed because none of user's groups are listed in AllowGroups
Feb 22 01:02:34 dcd-gentoo sshd[15801]: error: PAM: Authentication failure for illegal user root from 218.92.0.191
Feb 22 01:02:34 dcd-gentoo sshd[15801]: Failed keyboard-interactive/pam for invalid user root from 218.92.0.191 port 55414 ssh2
...

Invalid user rabbitmq from 123.206.212.138 port 46532

firewall-block, port(s): 389/udp, 6666/tcp, 8000/tcp, 8080/tcp