How to open a port on Linux Manjaro?

Question

linux

I want to open a port to launch a game server, on Windows I managed to open a port through the torrent settings and therefore I am sure that it can be opened using a computer without going into the router settings. On Linux, I tried to open it using iptables, but when checking the port on the 2ip site, it says "Port closed". Already the entire Runet and YouTube have climbed and have not found a solution to this problem. I hope for the great thinkers of this forum :))

Answer 1

iptables -A INPUT -s 5.5.5.5/32 -p tcp --dport 22 -j ACCEPT

open port 22 from IP address 5.5.5.5

Answer 2

As far as I understand, what you need is not iptables. You are talking about UPnP, and you need to dig towards the upnp client for your operating system. For example miniupnpc