[Factorio](https://www.factorio.com) is a game in which you build and maintain factories.
You will be mining resources, researching technologies, building infrastructure, automating production and fighting enemies. Use your imagination to design your factory, combine simple elements into ingenious structures, apply management skills to keep it working and finally protect it from the creatures who don't really like you.
The game is very stable and optimized for building massive factories. You can create your own maps, write mods in Lua or play with friends via Multiplayer.
NOTE: This is only the server. The game is available at [factorio.com](https://www.factorio.com) and [Steam](http://store.steampowered.com/app/427520/).
A new map named `_autosave1.zip` is generated the first time the server is started. The `map-gen-settings.json` file in `/tmp/factorio/config` is used for the map settings. On subsequent runs the newest save is used.
To load an old save stop the server and run the command `touch oldsave.zip`. This resets the date. Then restart the server. Another option is to delete all saves except one.
To change the password stop the server, modify `rconpw`, and restart the server.
To "disable" RCON don't expose port 27015, i.e. start the server with `-p 34197:34197/udp` instead of `-P`. RCON still runs, but nobody is able to connect to it.
Check the logs. If there is the line `Own address is RIGHT IP:WRONG PORT`, then this could be caused by the Docker proxy. If the the IP and port is correct it's probably a port forwarding or firewall issue instead.
By default, Docker routes traffic through a proxy. The proxy changes the source UDP port, so the wrong port is detected. See the forum post *[Incorrect port detected for docker hosted server](https://forums.factorio.com/viewtopic.php?f=49&t=35255)* for details.
To fix the incorrect port, start the Docker service with the `--userland-proxy=false` switch. Docker will route traffic with iptables rules instead of a proxy. Add the switch to the `DOCKER_OPTS` environment variable or `ExecStart` in the Docker systemd service definition. The specifics vary by operating system.
Use the `PORT` environment variable to start the server on the a different port, .e.g. `docker run -e "PORT=34198" ...`. This changes the source port on the packets used for port detection. `-p 34198:34197` works fine for private servers, but the server browser detects the wrong port.
