SerwerWeb.pl

The guide below describes how to install Telnet on Ubuntu 20.04. We will do everything in a few simple steps.

We start our terminal and issue a command:

sudo apt install telnetd -y

Installation complete 🙂

To check whether the port is open or whether the connection to a given port is correct, we issue a command:

telnet serwerweb.pl 25

So let's start the command telenet iplubnazwastrony dany port

Trying 37.28.157.157...
Connected to serwerweb.pl.
Escape character is '^]'.
220 hd2.uphost.pro ESMTP Exim 4.93.0.4 Fri, 30 Apr 2021 11:36:15 +0200

As you can see in this case we are connected to the port page 25 where the Exim mail server is placed.