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Master Server Quick Start

George Nance edited this page Jul 9, 2019 · 5 revisions

The Master Server is a stand alone server that allows for games to be publicly (or privately with password) listed for the world to join. If you've ever played an online game with friends, chances are that you have had to get their IP address in order to join their hosted games. The Master Server gives your game the ability to have these fancy server listings.

Getting the Master Server

The Master Server can either be built from source in the project repo, or downloaded from the nightly builds.

Running the Master Server

Upon downloading this file (a .zip file) you will find that within the contents is a README file to get you started and the .exe file to be run.


In windows it is very simple to host a Master Server. Just double click the MasterServer.exe and you are up and running! Once you have started the server the command prompts for a Host IP, if you are running this on a dedicated server like aws EC2 enter Example of Master Server running on windows

Other Platforms

On any platform other than Windows, as you may know, you can not run an .exe file. However with the power of Mono you will be abel to do such things without any extra coding needed. Please follow the instructions required to install mono onto your respective platform. After this you can open up a terminal window in the location where the .exe file was extracted and you can run the program by doing mono MasterServer.exe.

Once you have started the server the command prompts for a Host IP, if you are running this on a dedicated server like aws EC2 enter


So in order for your MasterServer to be effective, you will need to allow the process through your machine firewall (see instructions on how to allow a process on your operating system through the firewall). Once you have allowed the process on your machine through your machine's firewall, it is time for you to allow the port to your machine on the network. Yes, there are technically 2 firewalls that you have to setup to allow an application to be visible to the outside world. Every router is different and so there are many different ways to allow port forwarding to your machine. Please view an online guide on how to set this up for your router make/model. The default port number for the master server is 15940.

Using the Master Server

So now that we have the master server up and running on our machine, it is time to give it a test and see what all is needed to use it. Lets begin by making sure that everything is working properly by running the built in testing method for Master Servers that come with Forge Networking.

  1. Open your project with Forge Networking
  2. Open the demo Multiplayer Menu scene
  3. Make sure your build settings have a scene after the Multiplayer Menu scene in it
  4. Locate the Canvas game object in the hierarchy and select it
  5. Locate the Master Server Host and Master Server Port in the Inspector default-master-server-unity
  6. Input the local or static IP address of the machine your Master Server is running on
  7. Input 15940 as the port number for the Master Server
  8. Click the play button in Unity
  9. Click this Host button to start a game server

If you look at the Master Server command/terminal you should notice that a message appears with your game servers IP address and port number saying that it has been registered. At this point any clients can now connect to your Master Server and get the host listings. If the message did not appear then you've probably not setup the firewall settings correctly on either your machine or your router/network.


Getting Started
Network Contract Wizard (NCW)
Network Object
Remote Procedure Calls (RPCs)
Unity Integration
Basic Network Samples
Scene Navigation
Master Server
Web Server
Netcoding Design Patterns
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