PORT 8080 / TCPWeb & HTTPExposure Risk: Medium

Port 8080: HTTP Alternate / Tomcat / Proxy — Alternative HTTP Port, Spring Boot, Jenkins & Reverse Proxies

Widely used for Java Spring Boot, Apache Tomcat, Jenkins CI, cAdvisor, and non-root HTTP servers.

Default Service

HTTP Alternate / Tomcat / Proxy

Process: java / nginx / node

Transport Protocol

TCP

IANA Registered Port 8080

Docker Port Flag

-p 8080:8080

Container to Host Mapping

How to Check & Kill Process on Port 8080 (EADDRINUSE Fix)

macOS & Linux (lsof / kill)

# Find process using port 8080
sudo lsof -i :8080

# Instantly kill process on port 8080
lsof -ti:8080 | xargs kill -9

Windows (PowerShell & CMD)

# Find PID listening on port 8080
netstat -ano | findstr :8080

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

Cross-Platform Node.js One-Liner

# Kill port 8080 via npx
npx kill-port 8080

# Or diagnose via Castov CLI
npx castov fix "EADDRINUSE :::8080"

Linux Firewall (UFW) & Connectivity Test

# Test if port 8080 is reachable
nc -zv localhost 8080

# Allow or deny port 8080 in UFW
sudo ufw allow 8080/tcp

Frequently Asked Questions about Port 8080

What is Port 8080 used for?

Port 8080 is the standard network port for HTTP Alternate / Tomcat / Proxy (Alternative HTTP Port, Spring Boot, Jenkins & Reverse Proxies) operating over TCP. The typical system daemon or process is java / nginx / node.

How do I kill a process running on Port 8080 (EADDRINUSE)?

On macOS and Linux, run: lsof -ti:8080 | xargs kill -9 (or npx kill-port 8080). On Windows PowerShell/CMD, run: netstat -ano | findstr :8080 and then taskkill /PID <PID> /F.