May 21 01:55:39 h1745522 sshd[10596]: Invalid user jxm from 185.58.192.194 port 37140
May 21 01:55:39 h1745522 sshd[10596]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.58.192.194
May 21 01:55:39 h1745522 sshd[10596]: Invalid user jxm from 185.58.192.194 port 37140
May 21 01:55:41 h1745522 sshd[10596]: Failed password for invalid user jxm from 185.58.192.194 port 37140 ssh2
May 21 01:59:36 h1745522 sshd[11156]: Invalid user emy from 185.58.192.194 port 43364
May 21 01:59:36 h1745522 sshd[11156]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=185.58.192.194
May 21 01:59:36 h1745522 sshd[11156]: Invalid user emy from 185.58.192.194 port 43364
May 21 01:59:38 h1745522 sshd[11156]: Failed password for invalid user emy from 185.58.192.194 port 43364 ssh2
May 21 02:03:56 h1745522 sshd[11773]: Invalid user mks from 185.58.192.194 port 49590
...

May 21 02:11:49 piServer sshd[28225]: Failed password for root from 222.186.15.115 port 60140 ssh2
May 21 02:11:53 piServer sshd[28225]: Failed password for root from 222.186.15.115 port 60140 ssh2
May 21 02:11:57 piServer sshd[28225]: Failed password for root from 222.186.15.115 port 60140 ssh2
...

May 21 01:42:05 dev01 sshd[22986]: Invalid user oracle from 172.245.185.165 port 37961
May 21 01:42:21 dev01 sshd[23096]: Invalid user postgres from 172.245.185.165 port 44059
May 21 01:42:38 dev01 sshd[23136]: Invalid user hadoop from 172.245.185.165 port 50153
May 21 01:43:10 dev01 sshd[23281]: Invalid user mysql from 172.245.185.165 port 34114
May 21 01:43:26 dev01 sshd[23312]: Invalid user test from 172.245.185.165 port 40209


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=172.245.185.165

fail2ban/May 20 23:57:36 h1962932 sshd[3208]: Invalid user qoh from 182.253.184.20 port 38558
May 20 23:57:36 h1962932 sshd[3208]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=182.253.184.20
May 20 23:57:36 h1962932 sshd[3208]: Invalid user qoh from 182.253.184.20 port 38558
May 20 23:57:38 h1962932 sshd[3208]: Failed password for invalid user qoh from 182.253.184.20 port 38558 ssh2
May 21 00:04:45 h1962932 sshd[5456]: Invalid user lxu from 182.253.184.20 port 60944

May 21 01:01:45 [host] kernel: [6644316.314425] [U
May 21 01:04:00 [host] kernel: [6644451.434731] [U
May 21 01:37:21 [host] kernel: [6646452.669392] [U
May 21 01:38:21 [host] kernel: [6646512.169175] [U
May 21 01:42:26 [host] kernel: [6646757.083977] [U
May 21 01:50:10 [host] kernel: [6647221.248695] [U

May 21 02:01:00 legacy sshd[10305]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.82.253.106
May 21 02:01:03 legacy sshd[10305]: Failed password for invalid user fcm from 222.82.253.106 port 25057 ssh2
May 21 02:04:00 legacy sshd[10405]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=222.82.253.106
...

Automatic report - Port Scan Attack

May 21 01:44:34 pl3server sshd[27297]: Invalid user pi from 178.142.126.34 port 57838
May 21 01:44:34 pl3server sshd[27298]: Invalid user pi from 178.142.126.34 port 57840
May 21 01:44:34 pl3server sshd[27297]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.142.126.34
May 21 01:44:34 pl3server sshd[27298]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=178.142.126.34
May 21 01:44:36 pl3server sshd[27297]: Failed password for invalid user pi from 178.142.126.34 port 57838 ssh2
May 21 01:44:37 pl3server sshd[27298]: Failed password for invalid user pi from 178.142.126.34 port 57840 ssh2
May 21 01:44:37 pl3server sshd[27297]: Connection closed by 178.142.126.34 port 57838 [preauth]
May 21 01:44:37 pl3server sshd[27298]: Connection closed by 178.142.126.34 port 57840 [preauth]


........
-----------------------------------------------
https://www.blocklist.de/en/view.html?ip=178.142.126.34

May 21 02:07:41 nextcloud sshd\[28941\]: Invalid user cdk from 128.199.72.96
May 21 02:07:41 nextcloud sshd\[28941\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=128.199.72.96
May 21 02:07:43 nextcloud sshd\[28941\]: Failed password for invalid user cdk from 128.199.72.96 port 36524 ssh2

May 20 19:24:04 vps sshd[596186]: Failed password for invalid user siberest from 171.220.243.192 port 44400 ssh2
May 20 19:29:36 vps sshd[621185]: Invalid user jib from 171.220.243.192 port 48902
May 20 19:29:36 vps sshd[621185]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=171.220.243.192
May 20 19:29:38 vps sshd[621185]: Failed password for invalid user jib from 171.220.243.192 port 48902 ssh2
May 20 19:35:08 vps sshd[650313]: Invalid user vck from 171.220.243.192 port 53406
...

[2020-05-20 19:30:15] NOTICE[1157] chan_sip.c: Registration from 'xxxxxtestxxxx ' failed for '138.68.253.235:5060' - Wrong password
[2020-05-20 19:30:15] SECURITY[1173] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-05-20T19:30:15.129-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="xxxxxtestxxxx",SessionID="0x7f5f1051dd08",LocalAddress="IPV4/UDP/192.168.244.6/5060",RemoteAddress="IPV4/UDP/138.68.253.235/5060",Challenge="5fd2a5d9",ReceivedChallenge="5fd2a5d9",ReceivedHash="ab6fc5b8cc99f7b17ef7f28b37b8de35"
[2020-05-20 19:30:15] NOTICE[1157] chan_sip.c: Registration from '270270 ' failed for '138.68.253.235:5060' - Wrong password
[2020-05-20 19:30:15] SECURITY[1173] res_security_log.c: SecurityEvent="InvalidPassword",EventTV="2020-05-20T19:30:15.273-0400",Severity="Error",Service="SIP",EventVersion="2",AccountID="270270",SessionID="0x7f5f100266a8",LocalAddress="IPV4/UDP/192.168.244.6/
...

May 21 01:04:00 sigma sshd\[16843\]: Invalid user usf from 200.206.81.154May 21 01:04:02 sigma sshd\[16843\]: Failed password for invalid user usf from 200.206.81.154 port 57969 ssh2
...

Dovecot Invalid User Login Attempt.

Ssh brute force

Fail2Ban Ban Triggered (2)