I'm setting up my first home server from an old pc. I've installed Ubuntu Server 15.10. I've been trying and doing some research but I couldn't make the SSH work from an external computer, it always returns "Connection refused"
It works fine if I try from a LAN computer. I've installed no-ip in order to get an easier address. Regarding port forwarding, I have changed the port and I did the port forwarding from the router's webpage (192.168.1.1). I've checked in a website and it says my port is open.
The server is connected via ethernet from the router. I have 4 computers connected to my router. Since my external IP is the same from all computers, how does the ssh knows which computer to connect? How can I know to which computer am I connecting?
I've realized how to know to which computer I am connecting to, but I still can't connect