How do I Change the Port of My Existing Server?

[Jacksinnh]

I moved in with a friend who already has a server so I need to change the port on mine. How do I go about doing that?

[itzg]

How do you currently have your container server configured?

[d3adb5]

Your approach somewhat depends on your server configuration. The server running in the container will always listen on port 25565 while in the container, but you have to export the port manually when creating the container with Docker.

An example exporting it to another port can be found in the following docker-compose.yml:

version: "3"
services:
  minecraft:
    container_name: minecraft
    image: itzg/minecraft-server:java17-alpine
    environment:
      EULA: "true"
      MEMORY: "1024M"
      TYPE: "PAPER"
      LEVEL: "somelevelname"
      SERVER_NAME: "SomeServerName"
      DIFFICULTY: "normal"
      MAX_PLAYERS: "10"
      USER_AIKAR_FLAGS: "true"
    ports:
      - "3232:25565"
    volumes:
      - "/var/lib/minecraft:/data"

If you bring your server up using this Compose file, your server will be listening on local port 3232.

You can disregard the other options if they don't apply to your use case. The relevant part of this file is:

services:
  minecraft:
    ports:
      - "3232:25565"