Hello in which log file you can see telnet connections. I'd like to know how to make a telnet connection on port 587, which I can't do even with the firewall on/off. Mz
If you want to connect to port 587 then this is a connection to the email system (postfix), this means you can find it in the mail.log file. This means the log file always depends on the service you want to connect to and not if you use Telnet or another client for the connection.
Code: root@server1:~# telnet localhost 587 Trying ::1... Connected to localhost. Escape character is '^]'. 220 server1.example.com ESMTP Postfix (Debian/GNU) quit 221 2.0.0 Bye Connection closed by foreign host.