How to get the number of connections per port in Ubuntu?

Question

JavaScript

How can I find out how many devices are connected to a particular port?
We need exactly the devices and not the number of ip on the port

Answer 1

Why does not it work? Works.
Carefully replaces each character with a pair of square brackets.
True, after the root element (html) is changed, there are no other elements left.

Answer 2

The TCP/IP protocol does not contain device information.
The list of IPs that created the connection can be seen through the console command netstat -nat | grep :25.
Replace " :25 " with your specific port number.