// modpack server guide
FTB StoneBlock 3 server hosting & setup guide
An FTB StoneBlock 3 server needs Java 17 and about 7–7.5 GB of RAM for up to 3 players.
FTB's earlier underground pack on Forge 1.18.2: start in a world of solid stone and use magic and tech to carve out your own kingdom.
Pack details checked by hand against FTB StoneBlock 3 on FTB on October 4, 2026.
FTB StoneBlock 3 is a Forge modpack for Minecraft 1.18.2 with 224 mods, 220 of which run on the server. We'd pick our Premium plan (8 GB) for it.
- When we checked, FTB's own app had version 1.11.6 but the CurseForge copy was still on 1.11.5. Make sure the server and every player run the same version.
Quick facts
| Loader | Forge |
|---|---|
| Minecraft versions | 1.18.2 |
| Java needed | Java 17 for Minecraft 1.18.2 Java version chart. |
| Mods | 220 run on the server224 in the pack. The other 4 are client-only, and the server skips them. Counted from FTB's file list for version 1.11.6. |
| RAM | About 7–7.5 GB for 1–3 playersBy player count. |
| Downloads | 2,506,308 on the FTB appAs of October 4, 2026. |
| Latest version | June 11, 2026 (version 1.11.6)The newest version when we checked on October 4, 2026. |
| Official server files | Download pageFTB publishes server files for every version on the pack's Versions tab and in its server files browser. |
| Authors' RAM advice | FTB's launcher setting for this pack is 6 GB recommended and 4 GB minimum, for the game.Source |
| Where to get it | FTB StoneBlock 3 on FTB |
| Tags | quests, tech |
FTB StoneBlock 3 server files
FTB StoneBlock 3's authors publish official server files. FTB publishes server files for every version on the pack's Versions tab and in its server files browser. Get the official server files.
Use the server files for the exact version your players install: a server and client on different pack versions won't connect.
How much RAM does an FTB StoneBlock 3 server need?
| Players online | RAM | DSN plan |
|---|---|---|
| 1–3 players | About 7–7.5 GB | Premium (8 GB) |
| 4–8 players | About 7.5–9.5 GB | Heavy (12 GB)Premium (8 GB) can do if players stay close. |
| 9–15 players | About 9–11.5 GB | Heavy (12 GB) |
Estimated from 220 mods with our RAM calculator, set against the authors' own advice, not measured: low end if players stay together, high end if they spread out. What the authors say: FTB's launcher setting for this pack is 6 GB recommended and 4 GB minimum, for the game.
Set Java's heap (-Xmx) 10–15% under the RAM you have, about -Xmx7000M on 8 GB. Forge 1.18.2 reads it from user_jvm_args.txt: uncomment the -Xmx line. RAM guide.
FTB StoneBlock 3 server requirements
| Java | Java 17 |
|---|---|
| Loader | Forge for Minecraft 1.18.2 |
| CPU | Fast single-core speed (one main thread). With 220 mods, the first start takes minutes. |
| RAM | About 7–11.5 GB for 1–15 players (table above) |
| Disk | The server files, a growing world and backups |
| Network | TCP port 25565 open to players |
Recommended plan
Our pick for FTB StoneBlock 3
Premium
8 GB RAM · planned launch price $30/month
FTB recommends 6 GB for this pack, so 8 GB covers its 220 server-side mods with room for a small group.
Ordering is closed until we relaunch. We aren't taking orders or payments while we move to new hardware. Join the launch list and we'll email you when Premium servers open.
Running it for a bigger group or a public server? Go up to Heavy (12 GB, $42/month). Not sure? Email hello@dsnservers.com.
Planned launch price in USD, billed monthly once ordering opens, with a 7-day refund window.
How to make an FTB StoneBlock 3 server on your own PC
What's specific to FTB StoneBlock 3, step by step. The full walkthrough for any pack: how to make a modded Minecraft server.
- Install Java 17.
Check with
java -version. Java version chart. - Get the server files.
Download the official server files for the version your players use and unzip them into an empty folder. Follow the readme that comes with them.
- Start it and accept the EULA.
Run the start script in the server files, or the
run.sh/run.batthe Forge 1.18.2 installer writes, then seteula=trueineula.txtif you accept Mojang's EULA (EULA step). With 220 mods, the first start takes minutes. - Set the RAM with
-Xmx, sized from the table above. - Let friends connect: forward TCP 25565, or use a tunnel or host behind CGNAT (can't connect?).
Or run FTB StoneBlock 3 on DSN
Once we relaunch (join the launch list), on DSN you'd install FTB StoneBlock 3 from the panel's CurseForge modpack installer, pick Java 17 on the Startup tab and accept the EULA in the console. No port forwarding.
How to play FTB StoneBlock 3 with friends
Each player installs FTB StoneBlock 3 with the FTB App, the same version as the server, and adds the server's address under Multiplayer. The authors' memory advice for the game: FTB's launcher setting for this pack is 6 GB recommended and 4 GB minimum, for the game.
Different versions of FTB StoneBlock 3 on the server and a client show up as Mismatched mod channel list or mod rejections. Why friends can't join, timeouts included.
Lag and performance on FTB StoneBlock 3
Can't keep up! Is the server overloaded? means ticks take longer than 50 ms; more RAM won't fix that once FTB StoneBlock 3 has enough (tick lag guide). For FTB StoneBlock 3:
- Measure first: spark's
/spark tpsand profiler work on 1.18.2 and name the mod or machine using the tick time. - Distances:
view-distance=8and a lowersimulation-distanceinserver.properties. - Pre-generate: Chunky for 1.18.2,
/chunky radius 3000then/chunky start, before people explore.
Common FTB StoneBlock 3 crashes
What a Forge 1.18.2 server running FTB StoneBlock 3 hits most. For any other error, paste the log into the free crash log analyzer.
- Wrong Java version. FTB StoneBlock 3 on Minecraft 1.18.2 needs Java 17. Started on Java 8, it stops with
UnsupportedClassVersionError: ... class file version 61.0, this version of the Java Runtime only recognizes class file versions up to 52.0. Java version fix. - Out of memory. FTB StoneBlock 3 (220 mods) needs about 7–7.5 GB for 1–3 players;
java.lang.OutOfMemoryErrormeans it ran out. Out-of-memory fix. - Client-only mod on the server. FTB StoneBlock 3 includes 4 client-only mods, which a server install skips; copying a player's mods folder brings them back and stops the server. Check a mods list with the client-or-server-side checker. Client-only mod fix.
- After adding or updating a mod. Mods you add to FTB StoneBlock 3 by hand usually crash it with a missing dependency or a mixin conflict.
- Ticking entity or block entity. The crash report names it and gives its coordinates. Ticking entity fix.
Updates and support
Before moving FTB StoneBlock 3 past version 1.11.6, back up the world: see updating a modpack server without losing your world.
Bugs in FTB StoneBlock 3 itself go to its authors: issue tracker and wiki. Server problems on DSN: hello@dsnservers.com or Discord.
Packs like FTB StoneBlock 3
More: all modpack guides and how to make a modded server.
Run FTB StoneBlock 3 on DSN when we relaunch.
Our pick, Premium: 8 GB, planned at $30/month.
DSN Servers isn't affiliated with FTB StoneBlock 3 or FTB. We wrote the summary and checked the pack's facts by hand on October 4, 2026. Sources: feed-the-beast.com, api.feed-the-beast.com, curseforge.com, api.cfwidget.com.