Install a Custom Modpack or JAR

We define a modpack as an assortment of jars (mods), configuration files, etc., designed to run in a Minecraft Forge environment. Some examples of popular modpacks include: All The Mods, Feed The Beast, Tekkit, and many more.

Modpack Comes with Server Files

Adding a custom modpack involves creating a new server in Command Center, setting the server to "Custom Minecraft", uploading your modpack’s files to your server, and installing the main server JAR. These instructions assume that you’re trying to install server packs (not individual mods) that have their files available for download.

Download your modpack’s server files. If your modpack does not have premade server files, head down the page to this section on creating server files.
Login to Command Center.
Create a new server by clicking Create a Server from the server list. On the Games page, select Minecraft. Search for and select either Minecraft Forge or Minecraft Fabric in the list of available Minecraft games, depending on which your modpack uses. You could also choose Custom Minecraft, but that is a bit more work. Complete the installation process by filling in your friendly address and how much memory you want to give this new server.
From the server list, select the Manage button for the new server you just created. From here, you can find the SFTP information necessary to connect to your server either by clicking Show SFTP Info or by selecting SFTP Information from the Gear Icon menu.
Connect to your server SFTP.
Unzip the modpack server files on your computer. Upload them into the game’s SFTP folder in WinSCP. Your game files usually include folders named config, mods, etc. Older Forge versions may include coremods.
Complete the instructions in the next section if you chose Custom Minecraft Server. Otherwise, you should be able to start your server now.

Install the Custom JAR

Skip this step if you created a Minecraft Forge or Minecraft Fabric server. This is for if you chose Custom Minecraft server. The JARs you uploaded to your game’s folder in the SFTP are available for use.

From your Custom Minecraft server select Game Settings in the Gear Icon menu.
Go to the Custom Executable/JAR section.
Click the menu and select your JAR. The JAR has to be in the game’s folder as you uploaded it via SFTP.
Click Install and then Start on the top right.
Check the console for any error messages. If you have any issues, make sure to contact support for help.

Modpack Does Not Come with Server Files and/or Forge

You have two options if the custom modpack does not have server files.

Easy Option: Upload the Modpack Files to a Forge Server

We suggest using the Minecraft Forge installer to save yourself some time and effort. See the video below for more details.

Harder Option: Create Server Files

If your modpack doesn't come with server files, you will need to convert the modpack into a server. Read this article to learn how to do that.