Proxy headers in Nginx - Mini Project: Build & Apply

Setting Proxy Headers in Nginx

📖 Scenario: You are configuring an Nginx server to act as a reverse proxy for a backend application. To ensure the backend receives important client information, you need to set specific proxy headers.

🎯 Goal: Learn how to add proxy headers in an Nginx configuration to forward client IP and host information to the backend server.

📋 What You'll Learn

Create a basic Nginx server block listening on port 80

Add a proxy_pass directive to forward requests to http://localhost:3000

Add proxy_set_header directives for Host and X-Real-IP

Print the final Nginx configuration block

💡 Why This Matters

🌍 Real World

Nginx is often used as a reverse proxy to forward requests to backend servers. Setting proxy headers ensures the backend knows the original client details.

💼 Career

Understanding proxy headers is essential for DevOps roles managing web servers and load balancers to maintain accurate client information and logging.

1

Create basic Nginx server block

Create an Nginx server block that listens on port 80 and proxies requests to http://localhost:3000. Use location / with proxy_pass http://localhost:3000; inside.

Nginx

server {
    listen 80;
    location / {
        # Your code here
    }
}

Need a hint?

Use proxy_pass http://localhost:3000; inside the location / block.

2

Add proxy header for Host

Inside the location / block, add a line to set the proxy header Host to the original host using proxy_set_header Host $host;.

Nginx

server {
    listen 80;
    location / {
        proxy_pass http://localhost:3000;
        # Your code here
    }
}

Need a hint?

Use proxy_set_header Host $host; to forward the original host header.

3

Add proxy header for client IP

Add another line inside the location / block to set the proxy header X-Real-IP to the client IP using proxy_set_header X-Real-IP $remote_addr;.

Nginx

server {
    listen 80;
    location / {
        proxy_pass http://localhost:3000;
        proxy_set_header Host $host;
        # Your code here
    }
}

Need a hint?

Use proxy_set_header X-Real-IP $remote_addr; to forward the client IP address.

4

Print the final Nginx configuration

Print the entire Nginx server block configuration exactly as written, including the listen, proxy_pass, and both proxy_set_header lines.

Nginx

# Print the Nginx configuration below
# Your code here

Need a hint?

Use a print statement to display the full configuration exactly as shown.