Connecting
FortressMC runs Folia 1.21.11 at fortressmc.net. See Join for a quick copy-paste reference.
You can join from Java Edition or Bedrock Edition. The server uses Geyser for Bedrock crossplay, ViaBackwards for older Java clients, and ViaVersion for newer Java clients.
Supported client versions
FortressMC runs ViaVersion 5.10.0 and ViaBackwards 5.10.0.
| Direction | Plugin | Java client versions |
|---|---|---|
| Older client on 1.21.11 server | ViaBackwards | 1.10 to 1.21.11 |
| Newer client on 1.21.11 server | ViaVersion | 1.21.11 to 26.2 |
1.21.11 Java is recommended. Java 1.9 and below requires ViaRewind, which FortressMC does not run.
Java Edition
| Plugin | Purpose |
|---|---|
| ViaVersion | Lets newer Java clients join the 1.21.11 server |
| ViaBackwards | Lets older Java clients join the 1.21.11 server (requires ViaVersion) |
Known limitations on older clients (ViaBackwards docs):
- ViaBackwards cannot add blocks or features your client does not have. Very old clients may show missing blocks, UI quirks, or inventory desyncs.
- Clients below 1.17 cannot see or interact with blocks below Y=0 or above Y=255.
- Some UI and crafting differences between major versions will not translate perfectly.
FortressMC uses online mode (premium Java accounts). You must own Minecraft Java Edition to join as a Java player.
Bedrock Edition
Geyser runs on the server and translates Bedrock packets into Java packets.
Bedrock players can join from Windows 10/11, iOS, Android, Xbox, PlayStation, and Switch.
Bedrock connection details
- Server Address:
fortressmc.net - Port:
19132(UDP) - Bedrock auth is online (linked Java account through Geyser).
- Some Bedrock features differ from Java. See Geyser limitations for known gaps.
Version summary
| Platform | Address | Client version |
|---|---|---|
| Java (premium) | fortressmc.net (port 25565) | 1.10 to 26.2 (see table above) |
| Bedrock | fortressmc.net port 19132 | Geyser |
After you connect
- Install recommended client mods for voice chat and extended render distance.
- Read Server Rules and the Citadel / Interaction Keys pages before building anywhere you care about.
- New to Civ servers? Start with the homepage sections on reinforcement, pearling, and semi-anarchy politics.