Nginx: How to redirect the traffic to another port in Nginx

NGINX config to redirect to another port

NGINX Configuration Structure:

1. Main Configuration File: /etc/nginx/nginx.conf (location may vary)
2. Virtual Host Configuration Files: /etc/nginx/conf.d/ or /etc/nginx/sites-enabled/ (location may vary)
3. Snippets: Reusable configuration segments (e.g., /etc/nginx/snippets/)

---

Basic HTTP config

server {
    server_name example.com;
    listen 80;
    
    # Permanent redirect to a different port
    return 301 http://$host:8080$request_uri;

}

HTTPS config

server {
    server_name example.com;  # Replace with your domain

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

    # Permanent redirect to a different port
    return 301 http://$host:8080$request_uri;

}
server {
    if ($host = example.com) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    server_name example.com;
    listen 80;
    return 404; # managed by Certbot

}