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How to Solve "Error: listen EACCES: Permission Denied 0.0.0.0:3000" in Windows and Node.js

If you're a Node.js developer, you've likely encountered the "Error: listen EACCES: permission denied 0.0.0.0:3000" error message at some point while trying to run your application. This error occurs when Node.js is unable to bind to the specified port due to insufficient permissions. Fortunately, solving this issue is relatively straightforward, and this article will guide you through the steps to resolve it.

Understanding the Error:

The error message you encounter may look like this:

Solutions:

1. Change the Port:

The simplest solution is to change the port your application is trying to listen on. Ports below 1024 require elevated permissions, so you can choose a higher port number, such as 8080 or 3001, which usually don't require special privileges.

Express.js

1 const PORT = 8080;
2 app.listen(PORT, () => {
3   console.log(`Server is running on port ${PORT}`);
4 });

NestJs

Modify the main.ts file:

1 import { NestFactory } from '@nestjs/core';
2 import { AppModule } from './app.module';
3 
4 async function bootstrap() {
5   const app = await NestFactory.create(AppModule);
6   await app.listen(3001);
7 }
8 bootstrap();

NextJs

You can set port number using your package.json file, "scripts" section.

1 "scripts": {
2        "dev": "next dev -p 8080",
3        "start": "next start -p 8080",
4 },

2. Restart the Windows NAT Driver service:

Open Command Prompt or PowerShell as Administrator and run

then

then

then

and

Conclusion:

The "Error: listen EACCES: permission denied" error in NodeJs is a common issue that can be resolved by changing the port your application listens on, using sudo (though not recommended for production), specifying a different user or group, changing port permissions with setcap, or utilizing a reverse proxy in production environments. Choose the solution that best fits your use case and security requirements to get your Node.js application up and running without encountering this error.