auth-framework 0.4.2

# Production Nginx configuration for AuthFramework v0.4.0
# Includes security headers, rate limiting, and SSL optimization

user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

# Optimize worker connections
events {
    worker_connections 1024;
    use epoll;
    multi_accept on;
}

http {
    # Basic settings
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # Performance optimizations
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    client_max_body_size 10M;

    # Security headers
    server_tokens off;
    add_header X-Frame-Options DENY 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 Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self'; connect-src 'self'; frame-ancestors 'none';" always;

    # Rate limiting zones
    limit_req_zone $binary_remote_addr zone=auth:10m rate=10r/s;
    limit_req_zone $binary_remote_addr zone=api:10m rate=100r/s;
    limit_req_zone $binary_remote_addr zone=general:10m rate=5r/s;

    # Connection limiting
    limit_conn_zone $binary_remote_addr zone=conn_limit_per_ip:10m;

    # Logging format
    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for" '
                    'rt=$request_time uct="$upstream_connect_time" '
                    'uht="$upstream_header_time" urt="$upstream_response_time"';

    access_log /var/log/nginx/access.log main;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript
               application/json application/javascript application/xml+rss
               application/atom+xml image/svg+xml;

    # SSL configuration
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384;
    ssl_prefer_server_ciphers off;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 10m;
    ssl_stapling on;
    ssl_stapling_verify on;

    # Upstream servers
    upstream auth_backend {
        least_conn;
        server auth-server:8080 max_fails=3 fail_timeout=30s;
        # Add more servers for scaling:
        # server auth-server-2:8080 max_fails=3 fail_timeout=30s;
        keepalive 32;
    }

    # Health check endpoint (no SSL required)
    server {
        listen 80;
        server_name _;

        location /health {
            access_log off;
            return 200 "healthy\n";
            add_header Content-Type text/plain;
        }

        # Redirect all other HTTP traffic to HTTPS
        location / {
            return 301 https://$host$request_uri;
        }
    }

    # Main HTTPS server
    server {
        listen 443 ssl http2;
        server_name auth.yourdomain.com;

        # SSL certificates
        ssl_certificate /etc/nginx/ssl/fullchain.pem;
        ssl_certificate_key /etc/nginx/ssl/privkey.pem;
        ssl_trusted_certificate /etc/nginx/ssl/chain.pem;

        # HSTS header
        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;

        # Rate limiting
        limit_req zone=general burst=20 nodelay;
        limit_conn conn_limit_per_ip 20;

        # Main application proxy
        location / {
            limit_req zone=api burst=50 nodelay;

            proxy_pass http://auth_backend;
            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_set_header X-Forwarded-Host $host;
            proxy_set_header X-Forwarded-Port $server_port;

            # Timeouts
            proxy_connect_timeout 5s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;

            # Caching for static content
            proxy_cache_bypass $http_upgrade;
        }

        # Authentication endpoints with stricter rate limiting
        location ~ ^/(auth|login|oauth|token) {
            limit_req zone=auth burst=5 nodelay;

            proxy_pass http://auth_backend;
            proxy_http_version 1.1;
            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;

            # Shorter timeouts for auth endpoints
            proxy_connect_timeout 3s;
            proxy_send_timeout 30s;
            proxy_read_timeout 30s;
        }

        # Health check endpoint
        location /health {
            access_log off;
            proxy_pass http://auth_backend/health;
            proxy_connect_timeout 1s;
            proxy_send_timeout 1s;
            proxy_read_timeout 1s;
        }

        # Metrics endpoint (restrict access)
        location /metrics {
            allow 10.0.0.0/8;    # Internal networks
            allow 172.16.0.0/12;
            allow 192.168.0.0/16;
            deny all;

            proxy_pass http://auth_backend/metrics;
        }

        # Block common attack patterns
        location ~ /\. {
            deny all;
            access_log off;
            log_not_found off;
        }

        location ~ /(wp-|wordpress|admin|phpmyadmin) {
            deny all;
            access_log off;
            log_not_found off;
        }
    }

    # Include additional server configurations
    include /etc/nginx/conf.d/*.conf;
}