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Features

• All of Minecraft Classic features, including original physics.
• Improved hack detection and prevention.
• New commands: /ops, /bring, /paint, /water, /lava, /grass, /physics, etc.
• New configuration options for physics and security.
• Optional player whitelist.
• Load map files from .dat or .lvl format without needing to restart.
• Improved event logging.
• Reduced memory and CPU use.

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Commands

There are only two player ranks: regular (non-op) and op. All FemtoCraft commands require player to be an op, unless otherwise specified. List of ops is stored in admins.txt. Bans are stored in banned.txt. IP-Bans are stored in banned-ip.txt. Whitelist is stored in whitelist.txt. All commands except /bring, /grass, /lava, /paint, /setspawn, /solid, /teleport, and /water may be used from console. Commands marked with a star are specific to FemtoCraft, and not present in original Minecraft Classic server.

/ban <name>

Bans a player by name. If player is online, they are kicked.

/banip <name>

Bans an online player's IP address. Kicks all players who use this IP.

/banip <ip>

Bans a given IP address. Also kicks all players who use this IP.

/bring <name>

Brings another player to your location. This command cannot be used from console.

/broadcast <message>

Shows a message to all players on the server, highlighted in red.
Shortcut: /say <message>

/deop <name>

Demotes an op.

/gen X Y Z filename

Generates a new map with realistic terrain, and saves it to a given file. Filename must end with ".lvl". Note that X/Y dimensions are horizontal (width/length), and Z dimension is vertical (height/depth).

/genflat X Y Z filename

Same as /gen, but generated terrain is completely flat.

/grass

Toggles placement of grass blocks. When enabled, placed dirt blocks are replaced with grass. This command cannot be used from console.
Shortcut: /g

/kick <name>

Kicks an online player from the server.
Shortcut: /k <name>

/lava

Toggles placement of lava blocks. When enabled, placed red blocks are replaced with lava. This command cannot be used from console.
Shortcut: /l

/load <filename>

Replaces current map with one loaded from the given file. Only .dat and .lvl map files are supported for loading.

/op <name>

Promotes a player to op.

/ops

Shows a list of ops.

/paint

Toggles painting mode. When enabled, left-clicking a block replaces it instead of deleting it. Available to all players. This command cannot be used from console.
Shortcut: /p

/physics

Shows the enabled physics options on the server.

/physics on/off

Turns all physics on/off.

/physics <module>

Toggles individual physics modules. Modules are: grass, plants, sand, trees, water, lava.

/players

Shows a list of all online players.

/save <filename>

Saves current map to a given file. Only .lvl map files are supported for saving.

/setspawn

Sets a new spawn point for the map. This command cannot be used from console.

/solid

Toggles placement of admincrete blocks. When enabled, placed stone blocks are replaced with admincrete. This command cannot be used from console.
Shortcut: /s

/teleport <name>

Teleports you to another player. This command cannot be used from console.
Shortcut: /tp <name>

/unban <name>

Removes a ban on the given player.

/unbanip <ip>

Removed a ban on the given IP address.

/water

Toggles placement of water blocks. When enabled, placed blue blocks are replaced with water. This command cannot be used from console.
Shortcut: /w

/whitelist

If whitelist is enabled, shows a list of players who are allowed to join the server. Available to all players.

/whitelistadd

If whitelist is enabled, adds a name to the whitelist.

/whitelistremove

If whitelist is enabled, removes a name to the whitelist.

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Configuration

Configuration is stored in server.properties file. If no file is found, FemtoCraft will generate a default configuration file. Options marked with a star are specific to FemtoCraft, and not present in original Minecraft Classic server.

server-name

Name of the server, as it will appear to connecting players and on minecraft.net server list. Up to 64 characters long. Default is "FemtoCraft Server"

motd

Message-of-the-day (MOTD) - Text to show to connecting players. Up to 64 characters long. Default is "Welcome to the server!"

port

Port number to run the server on. You will need to set up port forwarding. Should be between 1024 and 65535. Default is 25565.

ip

Internal IP address to bind to. Do not touch this setting unless the server machine has multiple IP addresses or NICs. Default is "0.0.0.0" (meaning "any").

max-players

Maximum number of playes to allow on the server. Should be between 1 and 128. Default is 20.

public

Whether the server should be listed on minecraft.net's public server list. Should be either "true" or "false". Default is "false"

verify-names

Whether player names should be verified with Minecraft.net. It is very dangerous to disable name verification; that allows players to impersonate others. Should be either "true" or "false". Default (recommended) is "true"

use-whitelist

Whether FemtoCraft should only allow players on the whitelist (whitelist.txt) to join. Should be either "true" or "false". Default is "false"

admin-slot

Whether the server should kick someone to make room for an op if the server is full. Should be either "true" or "false". Default is "true"

reveal-ops

If enabled, ops' names are highlighted in a different color in chat and in-game, and /ops command becomes available to all players. Should be either "true" or "false". Default is "false"

max-connections

Maximum number of non-op players that FemtoCraft should allow from a single IP address at a time. Should be between 1 and 128. Default is 3.

limit-click-rate

Whether to limit non-op players' clicking rate. Useful for blocking tool-assisted griefers and bots. If enabled, limits click rate to ~7.8/second, averaged over 6 seconds. Should be either "true" or "false". Default is "true"

limit-click-distance

Whether to limit non-op players' clicking distance. Useful for blocking tool-assisted griefers and bots. If enabled, limits click distance to ~7 blocks. Should be either "true" or "false". Default is "true"

limit-chat-rate

Whether to limit non-op players' message-sending rate. Useful for blocking spam bots. If enabed, limits chat rate to 0.75/second, averaged over 4 seconds. Should be either "true" or "false". Default is "true"

allow-speed-hack

Whether to allow non-op players to use speedhacks. If enabed, limits horizontal delta to 32 units/packet horizontal, upwards delta 24 units/packet, and packet rate to 40 packets/second (averaged over 5 seconds). Should be either "true" or "false". Default is "false"

op-max-connections

Same as max-connections, but applied to op players. Default is 3.

op-limit-click-rate

Same as limit-click-rate, but applied to op players. Default is "true"

op-limit-click-distance

Same as limit-click-distance, but applied to op players. Default is "true"

op-limit-chat-rate

Same as limit-chat-rate, but applied to op players. Default is "true"

op-allow-speed-hack

Same as allow-speed-hack, but applied to op players. Default is "true"

physics

Whether to enable/disable ALL physics. None of the physics behaviors run unless this is "true". Should be either "true" or "false". Default is "true"

physics-tick

Delay, in milliseconds, between physics "tick". The lower the value, the faster all physics behaviors run. Should be between 10 and 1000. Default is 50.

physics-flood-protection

Whether to disable liquids in upper half of the map. Useful to prevent massive accidental floods. Should be either "true" or "false". Default is "false"

physics-grass

Whether grass should grow/die on the server. Should be either "true" or "false". Default is "true"

physics-plants

Whether flowers and mushrooms should respond to their environment. If enabled, flowers can only grow in the sun on dirt or grass, and mushrooms can only grow in the shade on stone, gravel, or cobblestone. Should be either "true" or "false". Default is "true"

physics-sand

Whether sand and gravel should collapse. Should be either "true" or "false". Default is "true"

physics-trees

Whether saplings should grow into full-size blocky trees. This setting was used to be known as grow-trees in original Minecraft Classic server. Should be either "true" or "false". Default is "false"

physics-water

Whether water should flow, spread, and be repelled by sponges. Should be either "true" or "false". Default is "true"

physics-lava

Whether lava should flow and spread. Should be either "true" or "false". Default is "true"

allow-water-blocks

Whether regular players can use /water command and place water blocks. Default is "false"

allow-lava-blocks

Whether regular players can use /lava command and place lava blocks. Default is "false"

allow-grass-blocks

Whether regular players can use /grass command and place grass blocks. Default is "false"

allow-grass-blocks

Whether regular players can use /solid command and place/delete solid (admincrete) blocks. Default is "false"

op-allow-water-blocks

Same as allow-water-blocks, but applied to op players. Default is "true"

op-allow-lava-blocks

Same as allow-lava-blocks, but applied to op players. Default is "true"

op-allow-grass-blocks

Same as allow-grass-blocks, but applied to op players. Default is "true"

op-allow-solid-blocks

Same as allow-solid-blocks, but applied to op players. Default is "true"