Hytale Advanced Server Configuration

This guide covers advanced Hytale server configuration including world settings, command-line arguments, and server mesh architecture.

Important: Always back up your server files before making configuration changes. Stop your server before editing any configuration files.

Configuration File Locations

File	Location	Purpose
config.json	Server root folder	Main server settings
permissions.json	Server root folder	Player roles and permissions
bans.json	Server root folder	Banned player list
whitelist.json	Server root folder	Allowed players list
config.json	universe/worlds/[WorldName]/	Per-world settings

Note: The exact format of config.json and permissions.json in the server root is not yet publicly documented. Check the official Hytale documentation for updates.

Editing Configuration Files

For Survival Servers Customers

1. Log into your control panel
2. Click Stop to shut down your server
3. Click Configuration Files or use FTP Access
4. Edit the desired file and save
5. Click Start to restart your server

For Self-Hosted Servers

1. Stop your server (type stop or press Ctrl+C)
2. Open the config file in a text editor
3. Make your changes and save
4. Start your server

World Configuration (universe/worlds/[WorldName]/config.json)

Each world has its own configuration file. Below is the documented world config structure:

{
  "Version": 4,
  "UUID": {
    "$binary": "j2x/idwTQpen24CDfH1+OQ==",
    "$type": "04"
  },
  "Seed": 1767292261384,
  "WorldGen": {
    "Type": "Hytale",
    "Name": "Default"
  },
  "WorldMap": {
    "Type": "WorldGen"
  },
  "ChunkStorage": {
    "Type": "Hytale"
  },
  "ChunkConfig": {},
  "IsTicking": true,
  "IsBlockTicking": true,
  "IsPvpEnabled": false,
  "IsFallDamageEnabled": true,
  "IsGameTimePaused": false,
  "GameTime": "0001-01-01T08:26:59.761606129Z",
  "RequiredPlugins": {},
  "IsSpawningNPC": true,
  "IsSpawnMarkersEnabled": true,
  "IsAllNPCFrozen": false,
  "GameplayConfig": "Default",
  "IsCompassUpdating": true,
  "IsSavingPlayers": true,
  "IsSavingChunks": true,
  "IsUnloadingChunks": true,
  "IsObjectiveMarkersEnabled": true,
  "DeleteOnUniverseStart": false,
  "DeleteOnRemove": false,
  "ResourceStorage": {
    "Type": "Hytale"
  },
  "Plugin": {}
}

Setting	Description
Seed	World generation seed
IsPvpEnabled	Allow player vs player combat
IsFallDamageEnabled	Players take fall damage
IsGameTimePaused	Freeze day/night cycle
IsSpawningNPC	Enable mob spawning
IsAllNPCFrozen	Freeze all NPCs in place
IsTicking	World simulation runs
IsBlockTicking	Block updates (crops, liquids)
IsSavingPlayers	Save player data
IsSavingChunks	Save world changes
IsUnloadingChunks	Unload empty chunks
DeleteOnUniverseStart	Delete world on server start
DeleteOnRemove	Delete world files when removed

World Pre-Generation

Pre-generating creates terrain ahead of time, reducing lag when players explore.

Method 1: In-Game Exploration

1. Start your server and log in as admin
2. Fly around the map to generate chunks
3. The server saves chunks as you explore

Method 2: Pre-Generation Mods

1. Add a pre-gen mod to your mods/ folder
2. Configure the area size and center point
3. Run the pre-generation command

Method 3: Command-Line

java -jar HytaleServer.jar --help

Check for built-in pre-generation options.

Server Mesh Architecture (Multi-Server Networks)

Hytale has built-in support for connecting multiple servers together without third-party proxies like BungeeCord.

These features are implemented via the server's Java API:

Feature	API Method	Description
Player Referral	PlayerRef.referToServer(host, port, payload)	Transfer players between servers with optional 4KB payload
Connection Redirect	PlayerSetupConnectEvent.referToServer(host, port)	Redirect during handshake before full connection
Disconnect Fallback	Coming soon	Auto-reconnect to fallback if server crashes

Security: Referral payloads pass through the client and can be tampered with. Sign payloads cryptographically (e.g., HMAC with a shared secret) so receiving servers can verify authenticity.

Custom Proxies: Build proxy servers using Netty QUIC. Packet definitions available in HytaleServer.jar at com.hypixel.hytale.protocol.packets.

Command-Line Arguments

java [JVM options] -jar HytaleServer.jar [server options]

JVM Options

Option	Description	Example
-Xms	Initial memory allocation	-Xms4G
-Xmx	Maximum memory allocation	-Xmx4G
-XX:+UseG1GC	Use G1 garbage collector	Recommended for 8GB+
-XX:AOTCache	Use AOT cache for faster startup	-XX:AOTCache=HytaleServer.aot

Server Options

Option	Description	Default
--assets <path>	Path to Assets.zip (required)	None
--bind <ip:port>	Address and port to listen on	0.0.0.0:5520
--auth-mode <mode>	authenticated or offline	authenticated
--backup	Enable automatic backups	Disabled
--backup-dir <path>	Backup storage location	./backups
--backup-frequency <mins>	Backup interval in minutes	60
--disable-sentry	Disable crash reporting	Enabled
--allow-op	Allow operator commands	Disabled
--accept-early-plugins	Load experimental plugins (unsupported)	Disabled

Example Launch Scripts

Production server (Windows - start.bat):

@echo off
java -Xms6G -Xmx6G -XX:+UseG1GC -XX:AOTCache=HytaleServer.aot -jar HytaleServer.jar --assets Assets.zip --backup --backup-frequency 60
pause

Production server (Linux - start.sh):

#!/bin/bash
java -Xms6G -Xmx6G -XX:+UseG1GC -XX:AOTCache=HytaleServer.aot -jar HytaleServer.jar --assets Assets.zip --backup --backup-frequency 60

Development server:

java -Xms4G -Xmx4G -jar HytaleServer.jar --assets Assets.zip --auth-mode offline --disable-sentry

Firewall Configuration

Hytale uses QUIC protocol over UDP (not TCP).

Windows PowerShell:

New-NetFirewallRule -DisplayName "Hytale Server" -Direction Inbound -Protocol UDP -LocalPort 5520 -Action Allow

Linux (iptables):

sudo iptables -A INPUT -p udp --dport 5520 -j ACCEPT

Linux (ufw):

sudo ufw allow 5520/udp

See Also

• How to Create a Hytale Server Guide
• How to Join a Hytale Server
• How to Install Mods on a Hytale Server
• Hytale Support & Documentation
• Rent a Hytale Server from Survival Servers