Setting Up Port Forwarding in Nginx: Forwarding HTTPS Port 7199 to HTTP Port 5199

Objective: By the end of this lesson, you will learn how to configure Nginx to listen on a new HTTPS port (7199) and forward all traffic to an HTTP service running on port 5199.

Prerequisites:

• Basic understanding of Nginx configuration.
• Access to Nginx configuration files.
• An active HTTP service running on port 5199.

Lesson Content:

1. Introduction to Port Forwarding and Nginx Configuration:
   • Understanding the concept of port forwarding and its applications.
   • Brief overview of Nginx as a web server and a reverse proxy.
2. Step 1: Configure Nginx to Listen on a New Port (7199):
   • Edit the Nginx configuration file (nginx.conf), usually found in /etc/nginx/ or a similar directory.
   • In the http block, add a new server block for port 7199:
     server {
listen 7199 ssl;
server_name www.yourdomain.com;ssl_certificate /path/to/your/certificate.crt;
     ssl_certificate_key /path/to/your/private.key;location / {
     proxy_pass http://localhost:5199;
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
     proxy_set_header X-Forwarded-Proto $scheme;
     }
     }

   • Replace /path/to/your/certificate.crt and /path/to/your/private.key with the paths to your SSL certificate and private key.
3. Step 2: Restart Nginx to Apply Changes:
   • Run the following command to restart Nginx and apply your new configuration:
     sudo systemctl restart nginx

   • Nginx will now listen on port 7199 and forward requests to port 5199.
4. Step 3: Testing the Configuration:
   • Open a web browser and go to https://www.yourdomain.com:7199.
   • Check that the content served is from the HTTP service on port 5199.
5. Step 4: Adjust Firewall Settings (If Necessary):
   • Ensure that the server’s firewall is configured to allow traffic on port 7199.
6. Conclusion and Troubleshooting Tips:
   • Summarize the key points of the lesson.
   • Provide common troubleshooting tips for issues like Nginx not restarting, or the service not being accessible.

Assignment:

• Implement this port forwarding setup on your Nginx server.
• Test the setup by accessing https://www.yourdomain.com:7199 and ensure it proxies to the service on port 5199.
• Document any challenges and solutions you encounter.

Additional Resources:

• Nginx Documentation on Reverse Proxy: Nginx Reverse Proxy
• Nginx Beginner’s Guide: Nginx Beginner’s Guide

Feedback and Support:

• For further queries or issues, consider consulting the Nginx community forums or seeking assistance from a network administrator.