If you're looking to host an all the mods 10 dedicated server, you've probably realized that the modding landscape has shifted quite a bit with the release of Minecraft 1.21. All The Mods (ATM) has always been the "kitchen sink" pack that everyone flocks to, and the tenth iteration is no different, even if it's still finding its footing in the newer version of the game. Setting up a private space for you and your friends isn't just about having a place to hang out; it's about making sure the server doesn't catch fire the moment someone starts building a massive thermal expansion setup.
ATM10 is built on NeoForge, which is the big evolution from the traditional Forge we've all used for years. This change means that if you're used to the old way of doing things, there are a few new wrinkles to iron out. But honestly, it's mostly the same drill: get the files, tweak the settings, and pray your RAM can handle the load.
Why you need some serious hardware
Let's be real for a second—you can't run an all the mods 10 dedicated server on a laptop from 2015. These packs are massive. Even though ATM10 is still growing as more mods get ported to 1.21, it's already a resource hog. If you're planning on hosting this yourself on a spare PC or a home server, you need to look at your RAM first.
I usually recommend at least 8GB of dedicated RAM just for the server process. That doesn't mean your computer has 8GB total; it means you have 8GB available to give to Minecraft. If you have 16GB in your system, you're cutting it close because Windows (or even Linux) needs its share to breathe. Ideally, if you want a smooth experience with three or four players, 12GB is the sweet spot. Anything more than 16GB for a small server might actually cause "garbage collection" lag, which is a weird Java quirk where the program spends too much time cleaning up its own memory.
The CPU matters just as much as the RAM. Minecraft is notoriously bad at using multiple cores. It mostly relies on single-core performance. So, a high-clock-speed processor is going to serve you way better than a server-grade CPU with 64 slow cores. If you're hearing your fans spin up like a jet engine, you might need to look into some optimization mods or just better hardware.
Getting the server files ready
First thing you'll want to do is grab the server pack. Usually, you can find this on the CurseForge page for All The Mods 10. They provide a handy zip file specifically for servers. Don't just try to copy your client-side "mods" folder into a server; that's a recipe for a crash loop. Client-side mods like shaders, minimaps (sometimes), or performance boosters like Iris don't belong on the server and will usually keep it from booting.
Once you've downloaded the server files and unzipped them into a dedicated folder, look for a file usually named start.bat (for Windows) or start.sh (for Linux). Before you run it, you'll need to accept the EULA. Just open eula.txt after your first failed launch attempt and change false to true. It's a bit of a legal hoop to jump through, but we all do it.
Speaking of the start script, this is where you set your memory limits. You'll see some text like -Xmx8G and -Xms8G. The Xmx is the maximum amount of RAM the server can use. If you've got the overhead, bump that up. If you're feeling fancy, you can add "Aikar's Flags" to the startup script. These are specific Java arguments that help the server handle memory more efficiently, which is a lifesaver for heavy modpacks like this one.
Networking and letting people in
This is usually the part where people get stuck. If you're hosting your all the mods 10 dedicated server from home, your friends can't see it unless you open a "door" in your router. This is called port forwarding. By default, Minecraft uses port 25565. You'll need to go into your router's settings—usually found by typing 192.168.1.1 into your browser—and point that port to the internal IP address of the computer running the server.
If port forwarding feels like you're trying to hack the Pentagon, there are alternatives. Services like Playit.gg or even a VPN like Tailscale can help you bypass the router headache, but they sometimes add a bit of latency. If you're playing with people halfway across the world, every millisecond counts, so a direct port forward is always the gold standard.
Dealing with the alpha nature of ATM10
Since All The Mods 10 is currently targeting the newest versions of Minecraft, it's important to remember that it's technically in a bit of a "living" state. Mods are being updated daily, and sometimes things break. When you run an all the mods 10 dedicated server, you should get used to checking for updates frequently.
One day, a specific pipe from a tech mod might cause a ticking entity crash, and the next day, a patch is out. It's the price we pay for being on the cutting edge. I always suggest setting up an automated backup system. There are mods included in the pack, like FTB Backups, that can do this for you. Seriously, don't skip this. There is nothing worse than having a world file get corrupted because the power went out or a mod update went sideways and losing 100 hours of progress in GregTech or whatever crazy grind you're currently on.
Optimizing for a lag-free experience
Even with a beastly PC, Minecraft 1.21 can be finicky. Once your server is up and running, keep an eye on the "TPS" or Ticks Per Second. You want this to stay at a solid 20.0. If it drops to 15 or 10, everything in the world will start moving in slow motion, and blocks will start reappearing after you break them—the dreaded ghost block syndrome.
- Pre-generate your world: One of the biggest causes of lag is chunk generation. When players fly around with jetpacks into ungenerated territory, the CPU has to work overtime to create that terrain. Use a command like
/chunkpregor a dedicated mod to pre-generate a 5,000-block radius around spawn while no one is playing. - Watch the entities: Too many cows in a 1x1 hole or 5,000 items sitting on a conveyor belt will kill your performance. Encourage your players to use storage buses or drawers rather than letting items sit in the world.
- The Pipe Problem: We all love automation, but some pipes are "laggier" than others. If the server starts chugging, it's usually because someone built a massive sorting system that's checking every chest in the base 20 times a second.
Choosing between self-hosting and a provider
If all of this sounds like a lot of work, you might be considering just paying someone else to do it. There are tons of Minecraft hosting companies out there that offer one-click installs for an all the mods 10 dedicated server. The benefit here is that the server stays on 24/7, your home internet doesn't take a hit, and you don't have to worry about your cat stepping on the power button of your PC.
However, the downside is the cost. Most budget hosts won't give you enough RAM to run ATM10 smoothly. You usually have to spring for the "premium" plans to get the 10GB-12GB of RAM needed. If you have a decent computer sitting idle at home, self-hosting is definitely the way to go to save some cash, especially since you have total control over the files and the hardware.
Keeping the community sane
Running the server is only half the battle; managing the people on it is the other half. If you're opening your server to the public, you absolutely need a whitelist. The modded community is generally pretty chill, but it only takes one person with a "creative" use of explosives to ruin the vibe.
Using the built-in claims system (usually FTB Chunks in the ATM packs) is a great way to let players protect their bases. It also allows them to "force load" chunks, which means their machines keep running even when they aren't online. Just be careful with this—if everyone on the server force-loads ten chunks, your all the mods 10 dedicated server will start to feel the pressure pretty quickly. I usually limit players to just one or two force-loaded chunks to keep things fair.
At the end of the day, hosting this pack is a bit of a project, but it's incredibly rewarding. There's something special about seeing a group of friends go from punching trees to building literal fusion reactors together. Just keep your Java updated, watch your RAM usage, and don't forget to back up the world. Happy crafting!