Let’s say, I live in a country, where I want to play Minecraft, but the game is banned by the government. Minecraft uses specific port 25565, so by analyzing my internet-traffic government can notice this port being used, and thus understand I play Minecraft.
If I use whonix, which runs all the traffic through Tor, are the ports I use hidden, or they’re visible on send to my internet provider?
The only thing your ISP and gov can see is an encrypted connection going to a Tor guard which connects at some random port number or specifically port 443 if you choose to make it so.
Nothing about the applications you tunnel through including port number is visible from the outside.
Indeed.
Yes, all ports are hidden.
user:
As a user/client you usually do not need to worry about ports.
server:
If you want to run a server / open a port, see:
Theory:
Practice: