SSH. Will the firewall let a connection from a public ip if there is an RSA key?

Question

SSH

This morning I set up an SSH server at home on a laptop in order to remotely work with a machine from college.
On a DevOps pair, I tried to connect to the server via IP via CMD (ssh [email protected]) and via PUTTY, writes connection timed out.
The machine is definitely turned on, I thought about it and remembered that I had not configured the firewall config.
So I wanted to know if I bring the RSA key on a USB flash drive, can I connect?
I am new to this topic, and I have only basic knowledge of SSH and Linux.
Thank you!

Answer 1

firewall does not check keys - you need to open a port so that the ssh client can reach the ssh server, and the ssh server will already check the keys

Answer 2

Are you sure that the laptop's IP is accessible from the network of the educational institution?

Answer 3

Firewall doesn't care about RSA key :) It has a list of rules according to which it works.