Remote Events and Client-Server Communication

Introduction

RemoteEvents are the bridge between what players see (client) and what the game enforces (server). Every purchase, attack, chat command, and UI interaction likely uses a RemoteEvent. Understanding them is essential for any Roblox developer building interactive experiences.

RemoteEvent Basics

Create a RemoteEvent in ReplicatedStorage. Client calls :FireServer(args). Server connects to .OnServerEvent. Server can :FireClient(player, args) or :FireAllClients(args) for feedback. Never pass Instances that clients should not control. Validate all arguments server-side.

Security Best Practices

Clients are untrusted. Check player.UserId matches the requesting player. Validate numeric ranges. Implement cooldowns with os.clock(). Log suspicious requests. Use RemoteFunctions only when you need a return value—they yield and are easier to abuse with spam.

Use Cases

• Shop purchases
• Combat actions
• UI button handlers
• Team selection

Best Practices

• One RemoteEvent per action type, not per button
• Rate-limit event handlers
• Never expose admin commands through remotes

Troubleshooting