Dec  9 21:48:14 hpm sshd\[24800\]: Invalid user orcel from 51.83.42.244
Dec  9 21:48:14 hpm sshd\[24800\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=244.ip-51-83-42.eu
Dec  9 21:48:16 hpm sshd\[24800\]: Failed password for invalid user orcel from 51.83.42.244 port 54942 ssh2
Dec  9 21:53:48 hpm sshd\[25340\]: Invalid user test from 51.83.42.244
Dec  9 21:53:48 hpm sshd\[25340\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=244.ip-51-83-42.eu

2019-12-10T08:00:35.676011shield sshd\[7635\]: Invalid user marlene from 170.81.148.7 port 40572
2019-12-10T08:00:35.680856shield sshd\[7635\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=sistema.mitelecom.net.br
2019-12-10T08:00:37.470316shield sshd\[7635\]: Failed password for invalid user marlene from 170.81.148.7 port 40572 ssh2
2019-12-10T08:07:06.531425shield sshd\[9774\]: Invalid user nnnnn from 170.81.148.7 port 49614
2019-12-10T08:07:06.535690shield sshd\[9774\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=sistema.mitelecom.net.br

$f2bV_matches

2019-12-10T08:03:47.592957shield sshd\[8801\]: Invalid user jerry from 118.24.56.143 port 40100
2019-12-10T08:03:47.596233shield sshd\[8801\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=118.24.56.143
2019-12-10T08:03:49.071228shield sshd\[8801\]: Failed password for invalid user jerry from 118.24.56.143 port 40100 ssh2
2019-12-10T08:10:36.470621shield sshd\[10450\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=118.24.56.143  user=root
2019-12-10T08:10:38.095905shield sshd\[10450\]: Failed password for root from 118.24.56.143 port 46198 ssh2

Dec 10 07:29:43 pornomens sshd\[3823\]: Invalid user svendson from 49.235.38.225 port 37368
Dec 10 07:29:43 pornomens sshd\[3823\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=49.235.38.225
Dec 10 07:29:45 pornomens sshd\[3823\]: Failed password for invalid user svendson from 49.235.38.225 port 37368 ssh2
...

Dec 10 08:31:11 OPSO sshd\[8151\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.36.189.198  user=root
Dec 10 08:31:14 OPSO sshd\[8151\]: Failed password for root from 54.36.189.198 port 57003 ssh2
Dec 10 08:36:26 OPSO sshd\[9521\]: Invalid user server from 54.36.189.198 port 62252
Dec 10 08:36:26 OPSO sshd\[9521\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=54.36.189.198
Dec 10 08:36:28 OPSO sshd\[9521\]: Failed password for invalid user server from 54.36.189.198 port 62252 ssh2

Dec 10 08:47:36 mail sshd[6432]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.164.48.164 
Dec 10 08:47:39 mail sshd[6432]: Failed password for invalid user postgres from 121.164.48.164 port 51240 ssh2
Dec 10 08:53:57 mail sshd[8327]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=121.164.48.164

2019-12-10T08:08:10.182905abusebot-3.cloudsearch.cf sshd\[20205\]: Invalid user admin from 70.88.253.123 port 40017

" "

Dec 10 08:51:59 relay postfix/smtpd\[3699\]: NOQUEUE: reject: RCPT from unknown\[181.41.216.137\]: 554 5.7.1 \: Relay access denied\; from=\<817n41a9fzyun5h@slon.ru\> to=\ proto=ESMTP helo=\<\[181.41.216.131\]\>
Dec 10 08:51:59 relay postfix/smtpd\[3699\]: NOQUEUE: reject: RCPT from unknown\[181.41.216.137\]: 554 5.7.1 \: Relay access denied\; from=\<817n41a9fzyun5h@slon.ru\> to=\ proto=ESMTP helo=\<\[181.41.216.131\]\>
Dec 10 08:51:59 relay postfix/smtpd\[3699\]: NOQUEUE: reject: RCPT from unknown\[181.41.216.137\]: 554 5.7.1 \: Relay access denied\; from=\<817n41a9fzyun5h@slon.ru\> to=\ proto=ESMTP helo=\<\[181.41.216.131\]\>
Dec 10 08:51:59 relay postfix/smtpd\[3699\]: NOQUEUE: reject: RCPT from unknown\[181.41.216.137\]: 554 5.7.1 \: Relay access denied\; from=\<817n41a9fzyun5h@slon.ru\> to=\

Dec 10 07:29:59 srv206 sshd[9209]: Invalid user mordechi from 84.1.28.157
Dec 10 07:29:59 srv206 sshd[9209]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=dsl54011c9d.fixip.t-online.hu
Dec 10 07:29:59 srv206 sshd[9209]: Invalid user mordechi from 84.1.28.157
Dec 10 07:30:01 srv206 sshd[9209]: Failed password for invalid user mordechi from 84.1.28.157 port 53668 ssh2
...

Dec 10 08:47:27 arianus sshd\[25740\]: Unable to negotiate with 218.92.0.171 port 62596: no matching key exchange method found. Their offer: diffie-hellman-group1-sha1,diffie-hellman-group14-sha1,diffie-hellman-group-exchange-sha1 \[preauth\]
...

Dec 10 08:52:44 loxhost sshd\[19760\]: Invalid user cin from 106.38.76.156 port 40127
Dec 10 08:52:44 loxhost sshd\[19760\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.38.76.156
Dec 10 08:52:46 loxhost sshd\[19760\]: Failed password for invalid user cin from 106.38.76.156 port 40127 ssh2
Dec 10 08:58:18 loxhost sshd\[19912\]: Invalid user root123456 from 106.38.76.156 port 57298
Dec 10 08:58:18 loxhost sshd\[19912\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=106.38.76.156
...

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

/var/log/messages:Dec 10 05:53:58 sanyalnet-cloud-vps audispd: node=sanyalnet-cloud-vps.freeddns.org type=CRYPTO_SESSION msg=audhostname(1575957238.514:8258): pid=21956 uid=0 auid=4294967295 ses=4294967295 msg='op=start direction=from-server cipher=aes256-ctr ksize=256 mac=hmac-sha1 pfs=ecdh-sha2-nistp256 spid=21957 suid=74 rport=20180 laddr=104.167.106.93 lport=22  exe="/usr/sbin/sshd" hostname=? addr=124.232.153.212 terminal=? res=success'
/var/log/messages:Dec 10 05:53:58 sanyalnet-cloud-vps audispd: node=sanyalnet-cloud-vps.freeddns.org type=CRYPTO_SESSION msg=audhostname(1575957238.518:8259): pid=21956 uid=0 auid=4294967295 ses=4294967295 msg='op=start direction=from-client cipher=aes256-ctr ksize=256 mac=hmac-sha1 pfs=ecdh-sha2-nistp256 spid=21957 suid=74 rport=20180 laddr=104.167.106.93 lport=22  exe="/usr/sbin/sshd" hostname=? addr=124.232.153.212 terminal=? res=success'
/var/log/messages:Dec 10 05:53:59 sanyalnet-cloud-vps fail2ban.filter[2496]: INFO [sshd] Fou........
-------------------------------