How to Install Modpacks on Your Minecraft Server

Modpacks transform Minecraft into an entirely new game—adding hundreds of new biomes, magic systems, tech automation, quests, and custom mobs. Popular modpacks like RLCraft, Cobblemon, All The Mods (ATM), and Better MC are played by millions of gamers around the world.

This guide will show you how to install modpacks on your Cubes Hosting Minecraft server using our 1-click panel tools or manual server pack uploads.

Method 1: Using the Cubes 1-Click Modpack Installer (Recommended)

Cubes Hosting features a built-in Modpack Installer that automates downloading, extracting, and configuring modpacks directly on your server.

1. Log in to your Cubes Hosting Game Panel and select your server.
2. Stop your server completely. (Crucial: Always stop your server before installing a new modpack!)
3. Navigate to Tools > Modpack Installer on the left menu.
4. Browse or search for your desired modpack (e.g., RLCraft, Cobblemon, Better MC, DawnCraft).
5. Select your preferred modpack version and click Install.
6. Wipe Option: The installer will ask if you want to wipe your current world files to start fresh. We highly recommend selecting Yes to prevent world generation conflicts.
7. Once installation finishes, go to the Console and click Start!

Our automated installer will set up the correct Forge, Fabric, or NeoForge server loader, extract all mod files, and adjust your Java settings automatically.

Pro-Tip (Switching Between Modpacks): Want to test a new modpack without losing your current world? Cubes Hosting includes 1GB of Backup Storage for free with every server! For larger modpacks, you can upgrade your Backup Storage addon to store multiple modpack instances safely in your backup slots, and restore any previous instance in seconds whenever you want to switch back!

Method 2: Manual Server Pack Upload (For Custom or Unlisted Modpacks)

If you are running a custom modpack or a server pack downloaded directly from CurseForge or Modrinth:

1. Download the "Server Pack"

Visit the modpack's page on CurseForge or Modrinth. Look for the download link labeled "Server Pack" (do not download the standard client zip, as it lacks server startup files).

2. Upload and Extract

1. Open the File Manager in your Game Panel (or connect via SFTP).
2. Upload the server pack .zip file into your server's root directory.
3. Right-click the .zip file in the File Manager and select Unarchive / Extract.

3. Verify Java Version & Startup File

1. Check which Minecraft version the modpack runs on:
   • Minecraft 1.20.5+: Requires Java 21
   • Minecraft 1.17 – 1.20.4: Requires Java 17
   • Minecraft 1.12.2 & older: Requires Java 8
2. Go to Configuration > Startup Parameters in your Game Panel and select the matching Java version.
3. Set your primary startup executable (e.g. forge-1.20.1-installer.jar or run.jar) and Start your server.

Important Requirements for Modded Playing

1. RAM Allocation Requirements

Modpacks require significantly more RAM than vanilla Minecraft servers due to hundreds of loaded mod assets:

• Light / Vanilla+ Modpacks (20–50 mods): 6 GB RAM
• Medium Modpacks (50–150 mods): 8 GB – 10 GB RAM
• Heavy / Kitchen-Sink Modpacks (200+ mods): 10 GB – 12 GB+ RAM

If your server crashes during boot with a java.lang.OutOfMemoryError, you may need to upgrade your Cubes Hosting plan to allocate more RAM.

2. Client Launcher Installation (For Players)

For players to join your modded server, they must have the exact same modpack installed on their computer launcher. Players should use custom mod launchers like the CurseForge App, Prism Launcher, FTB App, or Modrinth App to download and launch the modpack with a single click.

Conclusion

Installing modpacks is fast and effortless with Cubes Hosting's 1-click Modpack Installer under Tools. Choose your favorite pack, launch the server, make sure your players install the launcher app, and dive into an amazing modded adventure!