update

nginx-gnxsoft.conf

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+# Production Nginx Configuration for GNX Soft
+# Place this in /etc/nginx/sites-available/gnxsoft
+#
+# DEPLOYMENT NOTES:
+# 1. Frontend: Next.js production build runs on port 3000
+#    - Build: npm run build
+#    - Start: npm start (or use PM2: pm2 start npm --name "gnxsoft-frontend" -- start)
+# 2. Backend: Django runs on port 8000 (internal only)
+#    - Use Gunicorn: gunicorn gnx.wsgi:application --bind 127.0.0.1:8000
+#    - Or PM2: pm2 start gunicorn --name "gnxsoft-backend" -- gnx.wsgi:application --bind 127.0.0.1:8000
+
+# Frontend - Public facing (Next.js Production Server)
+upstream frontend {
+    server 127.0.0.1:3000;
+    keepalive 64;
+}
+
+# Backend - Internal only (Django)
+upstream backend_internal {
+    server 127.0.0.1:8000;
+    keepalive 64;
+}
+
+# Redirect HTTP to HTTPS
+server {
+    listen 80;
+    listen [::]:80;
+    server_name gnxsoft.com www.gnxsoft.com;
+    
+    # Let's Encrypt validation
+    location /.well-known/acme-challenge/ {
+        root /var/www/certbot;
+    }
+    
+    # Redirect all other traffic to HTTPS
+    location / {
+        return 301 https://$server_name$request_uri;
+    }
+}
+
+# HTTPS Frontend
+server {
+    listen 443 ssl http2;
+    listen [::]:443 ssl http2;
+    server_name gnxsoft.com www.gnxsoft.com;
+
+    # SSL Configuration
+    ssl_certificate /etc/letsencrypt/live/gnxsoft.com/fullchain.pem;
+    ssl_certificate_key /etc/letsencrypt/live/gnxsoft.com/privkey.pem;
+    ssl_protocols TLSv1.2 TLSv1.3;
+    ssl_ciphers ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384;
+    ssl_prefer_server_ciphers on;
+    ssl_session_cache shared:SSL:10m;
+    ssl_session_timeout 10m;
+
+    # Security Headers
+    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header X-XSS-Protection "1; mode=block" always;
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
+    add_header Permissions-Policy "camera=(), microphone=(), geolocation=(), interest-cohort=()" always;
+
+    # Rate Limiting Zones
+    limit_req_zone $binary_remote_addr zone=api_limit:10m rate=10r/s;
+    limit_req_zone $binary_remote_addr zone=general_limit:10m rate=100r/s;
+    limit_req_status 429;
+
+    # Client settings
+    client_max_body_size 10M;
+    client_body_timeout 30s;
+    client_header_timeout 30s;
+
+    # Logging
+    access_log /var/log/nginx/gnxsoft_access.log;
+    error_log /var/log/nginx/gnxsoft_error.log warn;
+
+    # Root location - Frontend (Next.js)
+    location / {
+        limit_req zone=general_limit burst=50 nodelay;
+        
+        proxy_pass http://frontend;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection 'upgrade';
+        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;
+        proxy_cache_bypass $http_upgrade;
+        
+        # Timeouts
+        proxy_connect_timeout 60s;
+        proxy_send_timeout 60s;
+        proxy_read_timeout 60s;
+    }
+
+    # API Proxy - Frontend talks to backend ONLY through this internal proxy
+    # Backend port 8000 is BLOCKED from internet by firewall
+    location /api/ {
+        limit_req zone=api_limit burst=20 nodelay;
+        
+        # Internal proxy to backend (127.0.0.1:8000)
+        # Backend is NOT accessible from public internet
+        proxy_pass http://backend_internal/api/;
+        proxy_http_version 1.1;
+        
+        # Backend sees request as coming from localhost
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP 127.0.0.1;
+        proxy_set_header X-Forwarded-For 127.0.0.1;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        
+        # Hide backend server info
+        proxy_hide_header X-Powered-By;
+        proxy_hide_header Server;
+        
+        # Timeouts
+        proxy_connect_timeout 30s;
+        proxy_send_timeout 30s;
+        proxy_read_timeout 30s;
+        
+        # CORS headers (if needed)
+        add_header Access-Control-Allow-Origin "https://gnxsoft.com" always;
+        add_header Access-Control-Allow-Methods "GET, POST, PUT, DELETE, OPTIONS" always;
+        add_header Access-Control-Allow-Headers "Authorization, Content-Type" always;
+        add_header Access-Control-Allow-Credentials "true" always;
+        
+        # Handle preflight requests
+        if ($request_method = 'OPTIONS') {
+            return 204;
+        }
+    }
+
+    # Media files (served by nginx directly for better performance)
+    location /media/ {
+        alias /var/www/gnxsoft/media/;
+        expires 30d;
+        add_header Cache-Control "public, immutable";
+        access_log off;
+        
+        # Security
+        location ~ \.(php|py|pl|sh)$ {
+            deny all;
+        }
+    }
+
+    # Static files (served by nginx directly)
+    location /static/ {
+        alias /var/www/gnxsoft/static/;
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+        access_log off;
+    }
+
+    # Next.js static files
+    location /_next/static/ {
+        proxy_pass http://frontend;
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+        access_log off;
+    }
+
+    # Deny access to hidden files
+    location ~ /\. {
+        deny all;
+        access_log off;
+        log_not_found off;
+    }
+
+    # Deny access to backend admin (extra security)
+    location /admin {
+        deny all;
+        return 404;
+    }
+
+    # Health check endpoint
+    location /health {
+        access_log off;
+        return 200 "OK\n";
+        add_header Content-Type text/plain;
+    }
+}
+
+# ==============================================================================
+# IMPORTANT SECURITY NOTES:
+# ==============================================================================
+# 1. Backend runs on 127.0.0.1:8000 (internal only)
+# 2. Firewall BLOCKS external access to port 8000
+# 3. Only nginx can reach backend (internal network)
+# 4. Public internet can ONLY access nginx (ports 80, 443)
+# 5. All API calls go through nginx proxy (/api/* → 127.0.0.1:8000/api/*)
+# 6. Backend IP whitelist middleware ensures only localhost requests
+# ==============================================================================
+