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Modpacks typically have two download types:
  • Client Pack: Installed on a player’s computer, usually via a launcher app like CurseForge or Prism.
  • Server Pack: A special .zip file containing all the necessary files to run the server. This is the one you must use.
Steps to Install a Modpack
  1. Download the “Server Pack”
    • Go to the modpack’s page on a site like CurseForge or Modrinth.
    • Find the “Files” or “Versions” tab.
    • Locate the version you want and look for an additional download link named “Server Pack” or “Server Files”. Download this .zip file.
  2. VERY IMPORTANT: Clean Your Server To avoid conflicts, you must start with a clean server.
    • Create a Backup of your server if it has important data.
    • In the File Manager, select all existing folders and files (like mods, config, world, server.jar, etc.) and Delete them.
  3. Upload and Unarchive the Server Pack
    • In the now-empty File Manager, click “Upload” and select the Server Pack .zip file you downloaded.
    • Once the upload is complete, click the three-dots icon (...) next to the .zip file and select “Unarchive” or “Decompress”. This will extract the modpack’s contents onto your server.
  4. Check the Startup Configuration This is the most crucial step.
    • Look inside the newly extracted folders and find the name of the server .jar file. It’s usually a Forge or Fabric file with a long name, for example: forge-1.19.2-43.2.0.jar.
    • Go to the “Startup” tab in Pterodactyl.
    • In the “Server JAR File” field, replace server.jar (or whatever the default is) with the exact .jar file name from your modpack. Example: forge-1.19.2-43.2.0.jar.
  5. Accept the EULA (If Necessary) Some server packs may require you to accept the EULA manually. Open the eula.txt file, change eula=false to eula=true, and save it.
  6. Start the Server Go back to the “Console” and click “Start”. The first startup for a large modpack can be very slow (5-15 minutes), so be patient. Monitor the console to see the progress.
For Players Players must download and install the exact same modpack version using a launcher app like the CurseForge App, Prism Launcher, ATLauncher, or the Modrinth App to be able to join.