Aug 18 05:47:05 fhem-rasp sshd[29918]: Failed password for root from 161.117.7.137 port 53280 ssh2
Aug 18 05:47:07 fhem-rasp sshd[29918]: Disconnected from authenticating user root 161.117.7.137 port 53280 [preauth]
...

Aug 18 13:36:20 cosmoit sshd[5264]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=37.59.37.69

SSH/22 MH Probe, BF, Hack -

1597726911 - 08/18/2020 07:01:51 Host: 117.216.165.189/117.216.165.189 Port: 445 TCP Blocked
...

Invalid user gl from 128.199.240.120 port 60574

X-Header-Overseas: Mail.from.Overseas.source.webmail.granjaregina.com.br
X-Originating-IP: [177.53.178.19]
Received: from webmail.granjaregina.com.br (webmail.granjaregina.com.br [177.53.178.19])
	by alph749.prodigy.net (Inbound 8.15.2/8.15.2) with ESMTPS id 07I7KKIi016305
	(version=TLSv1.2 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO)
	for <>; Tue, 18 Aug 2020 03:20:22 -0400
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Received: from [192.168.88.47] (unknown [185.248.12.100])
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	Tue, 18 Aug 2020 02:15:21 -0300 (BRT)
Content-Type: multipart/alternative; boundary="===============1766144709=="
MIME-Version: 1.0
Subject: Hello
To: Recipients 
From: "Les Matheson" 
Date: Tue, 18 Aug 2020 06:15:12 +0100
Reply-To: lesmatheson5@myfairpoint.net
Message-Id: <20200818051522.B33EB4106D00@webmail.granjaregina.com.br>
Content-Length: 667

Please confirm receipt of the previous email i sent =
to you
--===============1766144709==--

Unauthorised access (Aug 18) SRC=201.243.3.83 LEN=48 TTL=113 ID=10579 TCP DPT=445 WINDOW=8192 SYN

Aug 18 09:37:04 meumeu sshd[902097]: Invalid user col from 180.171.78.116 port 54912
Aug 18 09:37:04 meumeu sshd[902097]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.171.78.116 
Aug 18 09:37:04 meumeu sshd[902097]: Invalid user col from 180.171.78.116 port 54912
Aug 18 09:37:06 meumeu sshd[902097]: Failed password for invalid user col from 180.171.78.116 port 54912 ssh2
Aug 18 09:39:27 meumeu sshd[902203]: Invalid user kobayashi from 180.171.78.116 port 24864
Aug 18 09:39:27 meumeu sshd[902203]: pam_unix(sshd:auth): authentication failure; logname= uid=0 euid=0 tty=ssh ruser= rhost=180.171.78.116 
Aug 18 09:39:27 meumeu sshd[902203]: Invalid user kobayashi from 180.171.78.116 port 24864
Aug 18 09:39:28 meumeu sshd[902203]: Failed password for invalid user kobayashi from 180.171.78.116 port 24864 ssh2
Aug 18 09:41:48 meumeu sshd[902277]: Invalid user austin from 180.171.78.116 port 50209
...

Brute-force attempt banned

fail2ban

2020-08-18T08:58:02.448193beta postfix/smtpd[25040]: warning: unknown[185.234.217.151]: SASL LOGIN authentication failed: authentication failure
2020-08-18T09:09:30.264199beta postfix/smtpd[25438]: warning: unknown[185.234.217.151]: SASL LOGIN authentication failed: authentication failure
2020-08-18T09:21:00.937532beta postfix/smtpd[25635]: warning: unknown[185.234.217.151]: SASL LOGIN authentication failed: authentication failure
...

Aug 18 14:04:30 serwer sshd\[13612\]: Invalid user jack from 134.175.32.95 port 40860
Aug 18 14:04:30 serwer sshd\[13612\]: pam_unix\(sshd:auth\): authentication failure\; logname= uid=0 euid=0 tty=ssh ruser= rhost=134.175.32.95
Aug 18 14:04:32 serwer sshd\[13612\]: Failed password for invalid user jack from 134.175.32.95 port 40860 ssh2
...

Aug 18 08:48:45 [host] sshd[21073]: Invalid user t
Aug 18 08:48:45 [host] sshd[21073]: pam_unix(sshd:
Aug 18 08:48:47 [host] sshd[21073]: Failed passwor

20/8/17@23:46:45: FAIL: Alarm-Network address from=223.30.156.108
...

Tried sshing with brute force.