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A lightweight Paper plugin designed to prevent the most extreme cases of movement-based cheats like speed and flight.
VelocityGuard Plugin
VelocityGuard is a lightweight, lenient Minecraft Paper 1.21.8 plugin focused on preventing extreme movement (excessive speed and flight). It uses direct packet interception to immediately stop illegal movement spikes that cause chunk-loading lag. It is intentionally lenient: it will not block most cheats, but it will reliably curb the most extreme movements that harm server performance.
Features
- Direct Detection: Detects cheating in real-time at the packet level.
- Movement Blocking: Temporarily blocks movement when violations are detected.
- Pattern Detection: Identifies suspicious movement patterns.
- Adaptive System: Handles knockback, boats, horses, potions, trident riptide, and special movement states (swimming, flying, elytra gliding).
- Optional Flight Checks: Toggle whether to enforce anti-flight checks; keep only speed limiting if you prefer.
- Happy Ghast Compatible: Fully supports players riding Happy Ghasts without triggering false flight violations.
- Latency Compensation: Automatically adjusts speed checks based on player ping to prevent false positives on laggy connections.
Installation
- Download the latest release here.
- Place the
.jar
file in your Minecraft server'splugins
folder. - Restart your server.
Configuration
In config.yml
, you can configure:
# Configuration for detecting violations.
checks:
speed:
# Maximum horizontal speed in blocks per SECOND
# Default vanilla walking speed: ~4.3 blocks/s
# Default vanilla sprinting speed: ~5.6 blocks/s
# Sprint-jumping can reach speeds of ~9-10 blocks/s temporarily
# Recommended setting: 10.0 to allow for normal sprint-jumping with a buffer
max-horizontal-speed: 10.0
# How many seconds to cancel movement when a violation is detected.
# This will just refuse all movement packets for this duration.
# Has to be an integer.
cancel-duration: 3
# Latency compensation settings
latency-compensation:
# Whether to enable latency compensation
enabled: true
# Compensation factors for different ping ranges
# 1.0 means no compensation. Higher values allow more speed
very-low-ping: 1.1 # 21-50ms ping
low-ping: 2.1 # 51-100ms ping
medium-ping: 2.9 # 101-200ms ping
high-ping: 3.6 # 201-300ms ping
very-high-ping: 4.6 # 301-500ms ping
extreme-ping: 5.7 # 501-750ms ping
ultra-ping: 6.6 # 751-1000ms ping
insane-ping: 7.5 # 1000+ms ping
# Burst tolerance settings - number of consecutive violations allowed before punishment
# Higher ping players get more tolerance due to network inconsistency
burst-tolerance:
default: 15 # ≤20ms ping (no compensation)
very-low-ping: 15 # 21-50ms ping
low-ping: 20 # 51-100ms ping
medium-ping: 22 # 101-200ms ping
high-ping: 24 # 201-300ms ping
very-high-ping: 27 # 301-500ms ping
extreme-ping: 30 # 501-750ms ping
ultra-ping: 33 # 751-1000ms ping
insane-ping: 35 # 1000+ms ping
# Knockback adjustment settings
knockback:
# Multiplier for speed threshold after taking damage.
multiplier: 6.0
# Duration in milliseconds that knockback effect lasts.
duration: 1000
# Trident riptide handling.
riptide:
# Multiplier for speed threshold after using a trident with riptide enchantment.
multiplier: 8.0
# Duration in milliseconds that the riptide effect lasts.
duration: 3000
# Elytra movement handling
elytra:
# Multiplier for speed threshold while gliding with elytra
gliding-multiplier: 3.0
# Duration in milliseconds that landing adjustment lasts after stopping gliding
landing-duration: 1500
# Vehicle speed multipliers.
# Regular vehicle speed multiplier.
vehicle-speed-multiplier: 1.9
# Ice vehicle speed multiplier - only applies when vehicles are on ice.
# Boats on ice can move especially fast.
vehicle-ice-speed-multiplier: 4.3
# Extra buffer multiplier applied to all speed checks.
# This provides some leeway to prevent false positives.
# Lower values = stricter checks, higher values = more lenient.
buffer-multiplier: 1.1
flight:
# Whether to run flight checks (hovering/ascending while not gliding/flying)
# Disable this if you only want speed limiting and no flight enforcement.
enabled: true
# General settings.
settings:
# Only enable if you are developing or testing the plugin
# as this results in verbose logging.
debug-mode: false
How It Works
- The plugin intercepts player movement packets before they're processed.
- Each movement is checked against configured speed limits and (optionally) flight rules.
- The plugin considers various factors like knockback, potion effects, special movement states, and vehicle types (Happy Ghasts are exempt from flight checks).
- Sophisticated pattern detection identifies potential speed cheats that stay just under the defined thresholds.
- Invalid movements are rejected, and player movement is temporarily blocked.
- Players receive notification when cheating is detected.
- After the block duration ends, players can immediately move normally again.
Commands
/velocityguard reload
: Reloads the plugin configuration (requires thevelocityguard.admin
permission).
Permissions
velocityguard.admin
: Allows reloading the plugin configuration (default: op).
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