PORT 3030 / TCPDev & LocalhostExposure Risk: Low

Port 3030: Express / FeathersJS / Actix — Rust Actix, FeathersJS & Local API Server

Popular default port for Rust web servers, FeathersJS APIs, and local static file servers.

Default Service

Express / FeathersJS / Actix

Process: node / cargo

Transport Protocol

TCP

IANA Registered Port 3030

Docker Port Flag

-p 3030:3030

Container to Host Mapping

How to Check & Kill Process on Port 3030 (EADDRINUSE Fix)

macOS & Linux (lsof / kill)

# Find process using port 3030
sudo lsof -i :3030

# Instantly kill process on port 3030
lsof -ti:3030 | xargs kill -9

Windows (PowerShell & CMD)

# Find PID listening on port 3030
netstat -ano | findstr :3030

# Force kill by PID
taskkill /PID <PID_NUMBER> /F

Cross-Platform Node.js One-Liner

# Kill port 3030 via npx
npx kill-port 3030

# Or diagnose via Castov CLI
npx castov fix "EADDRINUSE :::3030"

Linux Firewall (UFW) & Connectivity Test

# Test if port 3030 is reachable
nc -zv localhost 3030

# Allow or deny port 3030 in UFW
sudo ufw allow 3030/tcp

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Frequently Asked Questions about Port 3030

What is Port 3030 used for?

Port 3030 is the standard network port for Express / FeathersJS / Actix (Rust Actix, FeathersJS & Local API Server) operating over TCP. The typical system daemon or process is node / cargo.

How do I kill a process running on Port 3030 (EADDRINUSE)?

On macOS and Linux, run: lsof -ti:3030 | xargs kill -9 (or npx kill-port 3030). On Windows PowerShell/CMD, run: netstat -ano | findstr :3030 and then taskkill /PID <PID> /F.