MC Eternal Minecraft server setup

MC Eternal is a "kitchen sink" Forge modpack for Minecraft 1.12.2, made by adam98991. Its CurseForge page lists quests, magic, tech and exploration, and the author describes hundreds of quests, Tinkers Construct materials, MineColonies towns and a custom Moon dimension. This guide installs it from the Modpacks tab and covers which file you get and what your players need.

Checked against MC Eternal 1.6.2.3 on Minecraft 1.12.2 with Forge 14.23.5.2860, October 2026.

What it needs

• Forge on Minecraft 1.12.2. The pack's manifest names Forge 14.23.5.2860. The panel picks Java 8 for 1.12.2 and switches it for you.
• RAM. The CurseForge page asks for at least 5.5 GB for a server and recommends 8 GB or more. Pick a plan with 8 GB or more on Minecraft hosting; our 8 GB test server ran it. How much RAM a Minecraft server needs explains how that is used.
• The right pack. The same author publishes MC Eternal 2, MC Eternal Lite and MC Eternal Hardcore as separate packs. This guide is for the original, called MC Eternal.

Which file you get

With the version drop-down in the install window left on Newest that fits your server (or with no drop-down shown), the panel takes the newest release, 1.6.2.3. It has no server download, so the panel builds the server from the pack's mod list. The install turns off PackModeMenu, a mod for players' computers that would otherwise stop the server at its first start.

Download five mods first

Five of the pack's mods can only be downloaded from CurseForge's own site. The install window lists them under "5 mods need you to download them first":

• Immersive Technology
• Dungeon Tactics
• Ghost's Explosives
• Corail Tombstone
• Open Modular Turrets

Get each one with its Download from CurseForge button and drop it in the window, as Modpack mods to download from CurseForge shows, until the heading reads Every mod is ready to go in. Don't tick Install without them. When this guide was checked, a server installed without them stopped at its first start with == ENDER IO FATAL RECIPE ERROR ==, because the pack's recipes need Dungeon Tactics.

Install it on your server

Installing a modpack reinstalls the whole server and replaces the current world, so use a new server or one you can wipe.

1. Open Backups and click Create backup.
2. Open Modpacks, under Content in the left rail. Press the CurseForge source button.
3. Search for MC Eternal and find the row named MC Eternal by adam98991. Check the name carefully, because MC Eternal 2 and MC Eternal Lite appear beside it.
4. Click Install. A window titled Install MC Eternal? opens. Leave its version drop-down on Newest that fits your server.
5. Drop in the five mods, as above.
6. Leave Take a backup first ticked. Tick Start the server when it's ready if you want it to start by itself, but leave it unticked if you want to set the world type first (see First start). If an I agree to the Minecraft EULA box appears, tick it once you have read the EULA.
7. Press and hold the Hold to Install and reinstall button for about three seconds, until it fills, then watch the Console tab. The pack has more than 300 mods, so allow time.

The console reports 5 mod(s) you uploaded added, 334 mods added (2 of them from Modrinth) and 1 client-only mod(s) turned off. The pack ships no server engine, so the install sets up Forge 1.12.2-14.23.5.2860, the build the pack's manifest names, and writes its own start script. The panel sizes Java's memory from your plan's RAM.

First start

Press Start on the Console tab and accept the Minecraft EULA if the window appears. The first start is slow: when this guide was checked, about four and a half minutes passed before the console printed Done (13.205s)!. Wait until the console stops printing and the server shows as running. Your address is in the left rail under Server address: Connect to your server for the first time.

The 1.6.2.2 server download set level-type=BIOMESOP, the Biomes O' Plenty world type. The 1.6.2.3 install writes no world type, so a new world uses Minecraft's default. For the world type the author's server files used, open server.properties in File Manager before the first start and add the line level-type=BIOMESOP: the setting only matters when a world is first created. Open Operators in the Players tab or run op yourname in the Console to give yourself commands.

Join the server

1. In the CurseForge app, install MC Eternal and pick version 1.6.2.3, the version the server runs.
2. Add your server in the multiplayer list with the address from the left rail.

Common problems

• The first start stops with ENDER IO FATAL RECIPE ERROR. Dungeon Tactics, one of the five mods, is missing. The panel stops a start that writes a crash report about 30 seconds later. Add the missing mods from the Modpacks tab, then press Start again.
• The client crashes on start. The author's 1.6.2.3 notes say the update to SerializationIsBad 1.5.2 solves a common client startup crash. Update the client.
• Players cannot join. Check they use 1.6.2.3, the version the server runs.
• The server runs out of memory. Watch the RAM card on the Console tab, and see Why is my server lagging.