Running a modpack server is the best way to play packs like All the Mods, RLCraft or Better MC with friends. Here is how to install a Forge (or NeoForge/Fabric) modpack on your Minecraft server.
On GGameHost you can install most CurseForge modpacks straight from the panel — pick the pack and version, and the server sets up Forge and all mods for you. This is the fastest, least error-prone route.
Every player must run the same modpack and version from the same launcher. A mismatch is the number-one cause of "failed to connect" errors.
Modpacks are heavy. Plan for 6–8 GB for medium packs and 8–12 GB+ for large ones like All the Mods. GGameHost lets you raise RAM in one click.
Read the latest log in the panel — it usually names the offending mod. Most crashes are a missing dependency, a version mismatch, or too little RAM. Remove or update the named mod and restart.