Minecraft

This tutorial explains how to set up a Minecraft server in the Cobalt dashboard.

Changing configs

1. Open the servers page.

2. Find the server you want to change settings in the table and click the first button in the actions column.

3. Open the files tab at the top.

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   server.properties

   1. Open the server.properties file in the file editor.

   2. Update the settings.

   List of settings

   This table refers to version 26.2. Some settings may not be available in earlier versions. Cobalt overrides some default values when a server is created.

   Key	Type	Default	Description
   accepts-transfers	boolean	false	Whether to accept incoming player transfers via transfer packet.
   allow-flight	boolean	false	Allows flight in Survival mode if the player has a fly mod. Players in air for 5+ seconds get kicked if disabled.
   broadcast-console-to-ops	boolean	true	Sends console command outputs to all online operators.
   broadcast-rcon-to-ops	boolean	true	Sends RCON command outputs to all online operators.
   bug-report-link	string	(blank)	URL for the report_bug server link. Not sent if empty.
   chat-spam-threshold-seconds	integer	10	Ticks before a player is kicked for sending too many chat messages. 0 disables.
   command-spam-threshold-seconds	integer	10	Ticks before a player is kicked for sending too many commands. 0 disables.
   difficulty	string	easy	Server difficulty: peaceful, easy, normal, hard.
   enable-code-of-conduct	boolean	false	Whether to show code of conduct files from the codeofconduct folder to players on join.
   enable-jmx-monitoring	boolean	false	Exposes a JMX MBean with tick time metrics. Requires additional JVM flags.
   enable-query	boolean	false	Enables GameSpy4 query protocol for server info.
   enable-rcon	boolean	false	Enables remote console access via RCON. Not recommended over untrusted networks.
   enable-status	boolean	true	Makes the server appear online in the server list. If false, still accepts connections but appears offline.
   enforce-secure-profile	boolean	true	Requires players to have a Mojang-signed public key. Chat will be unsigned if disabled.
   enforce-whitelist	boolean	false	Kicks online players not on the whitelist when it is reloaded.
   entity-broadcast-range-percentage	integer	100	Percentage of default distance at which entities are sent to clients. Lower = less lag, shorter render distance. Must be between 10 and 1000.
   force-gamemode	boolean	false	Forces players to join in the default game mode every time.
   function-permission-level	integer	2	Default permission level for functions. Must be between 1 and 4.
   gamemode	string	survival	Default game mode: survival, creative, adventure, spectator.
   generate-structures	boolean	true	Whether structures like villages are generated. Dungeons still generate if false.
   generator-settings	string	{}	JSON settings for custom world generation. Used with level-type=minecraft:flat.
   hardcore	boolean	false	Enables hardcore mode - players become spectators on death.
   hide-online-players	boolean	false	Disables sending the player list in status requests.
   initial-disabled-packs	string	(blank)	Comma-separated list of datapacks disabled on world creation.
   initial-enabled-packs	string	vanilla	Comma-separated list of datapacks enabled on world creation. Feature packs must be explicitly listed.
   level-name	string	world	World name and folder path. Can be absolute or relative.
   level-seed	string	(blank)	World seed. Random if blank.
   level-type	string	minecraft:normal	World preset: minecraft:normal, minecraft:flat, minecraft:large_biomes, minecraft:amplified, minecraft:single_biome_surface.
   log-ips	boolean	true	Whether client IPs are shown in console and log output.
   management-server-allowed-origins	string	(blank)	Allowed origins for the Minecraft Server Management Protocol.
   management-server-enabled	boolean	false	Whether the Minecraft Server Management Protocol is enabled.
   management-server-host	string	localhost	Host the management server listens on.
   management-server-port	integer	0	Port the management server listens on.
   management-server-secret	string	(random)	Secret for management server client authorization. Auto-generated if blank.
   management-server-tls-enabled	boolean	true	Whether the management server uses TLS.
   management-server-tls-keystore	string	(blank)	Path to the TLS keystore file. Required if TLS is enabled.
   management-server-tls-keystore-password	string	(blank)	Password for the TLS keystore. Can also be set via env var or JVM flag.
   max-chained-neighbor-updates	integer	1000000	Max consecutive neighbor updates before skipping. Negative = no limit.
   max-players	integer	20	Maximum players on the server at once.
   max-tick-time	integer	60000	Max milliseconds per tick before the watchdog shuts down the server. -1 disables.
   max-world-size	integer	29999984	Max world border radius in blocks. Must be between 1 and 29999984.
   motd	string	A Minecraft Server	Message shown in the server list. Supports color/formatting codes.
   network-compression-threshold	integer	256	Minimum packet size in bytes to compress. -1 disables, 0 compresses all.
   online-mode	boolean	true	Verifies players against Mojang account database. Disable only for offline/LAN servers.
   op-permission-level	integer	4	Default permission level assigned when using /op. Must be between 0 and 4.
   pause-when-empty-seconds	integer	60	Seconds after all players leave before the server pauses.
   player-idle-timeout	integer	0	Minutes before idle players are kicked. 0 = never.
   prevent-proxy-connections	boolean	false	Kicks players whose ISP differs from Mojang's auth server.
   query.port	integer	25565	UDP port for the query server (requires enable-query).
   rate-limit	integer	0	Max packets per second per player before kick. 0 disables.
   rcon.password	string	(blank)	RCON password. RCON won't start if blank and enabled.
   rcon.port	integer	25575	TCP port for RCON.
   region-file-compression	string	deflate	Chunk compression algorithm: deflate, lz4, or none.
   require-resource-pack	boolean	false	Disconnects players who decline the resource pack.
   resource-pack	string	(blank)	URL to an optional resource pack. Max 250 MiB.
   resource-pack-id	UUID	(blank)	Optional UUID to identify the resource pack with clients.
   resource-pack-prompt	string	(blank)	Custom message shown on the resource pack prompt.
   resource-pack-sha1	string	(blank)	SHA-1 hash of the resource pack for integrity verification.
   server-ip	string	(blank)	IP the server binds to. Leave blank to listen on all interfaces.
   server-port	integer	25565	TCP port the server listens on. Must be forwarded if behind NAT.
   simulation-distance	integer	10	Chunk radius in which entities are ticked by the server. Must be between 3 and 32.
   spawn-protection	integer	16	Spawn protection radius as 2x+1 blocks. 0 disables.
   status-heartbeat-interval	integer	0	Interval in seconds for management server heartbeat notifications. 0 disables.
   sync-chunk-writes	boolean	true	Enables synchronous chunk writes to prevent data loss on crash. May slow down I/O.
   text-filtering-config	string	(blank)	Chat filtering config. Used internally by Realms.
   text-filtering-version	integer	0	Config format version for text-filtering-config. Valid values: 0, 1.
   use-native-transport	boolean	true	Enables Linux-optimized packet handling (Linux only).
   view-distance	integer	10	Server-side view distance in chunks (radius). Must be between 3 and 32.
   white-list	boolean	false	Enables whitelist. Players not on it cannot connect. Ops are automatically whitelisted.

   WARNING

   Do not change the server-port and server-ip settings.

   3. Click the save button in the bottom left corner.

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4. Open the overview tab at the top.

5. Click the restart button in the control block.

Adding plugins

WARNING

Plugins can only be added for the Paper loader.

1. Open the servers page.

2. Find the server you want to add plugins in the table and click the first button in the actions column.

3. Upload plugins using one of the following methods:

File manager

1. Open the files tab at the top.

2. Open the plugins folder in the file manager.

3. Click the upload button in the bottom left corner.

4. Select the plugins files from your device.

TIP

You can find plugins on Hangar or SpigotMC.

5. Click the upload button in the bottom right corner.

8. Open the overview tab at the top.

9. Click the restart button in the control block.

Adding mods

WARNING

Mods can only be added for the Fabric and Forge loaders.

1. Open the servers page.

2. Find the server you want to add mods in the table and click the first button in the actions column.

3. Upload mods using one of the following methods:

File manager

1. Open the files tab at the top.

2. Open the mods folder in the file manager.

3. Click the upload button in the bottom left corner.

4. Select the mods files from your device.

TIP

You can find mods on Modrinth or CurseForge.

5. Click the upload button in the bottom right corner.

4. Open the overview tab at the top.

5. Click the restart button in the control block.