nginx.conf

user www;
worker_processes 4; # Ajustado para los 4 núcleos de la Raspberry Pi 3 B+
worker_rlimit_nofile 1024; # Reducido debido a las limitaciones de recursos

load_module /usr/local/libexec/nginx/ngx_http_modsecurity_module.so;
load_module /usr/local/libexec/nginx/ngx_http_brotli_filter_module.so;
load_module /usr/local/libexec/nginx/ngx_http_brotli_static_module.so;

events {
    worker_connections 1024; # Reducido para evitar sobrecargar el sistema
    use kqueue;
    multi_accept on;
}

http {
    # General Settings
    server_names_hash_bucket_size 64;
    server_names_hash_max_size 512;
    types_hash_max_size 2048;
    client_body_buffer_size 128k; # Reducido
    client_max_body_size 10m; # Reducido
    client_body_timeout 12s;
    client_header_timeout 12s;
    keepalive_timeout 15;
    send_timeout 10;
    keepalive_requests 100;
    reset_timedout_connection on;
    large_client_header_buffers 4 4k;
    
    # Caché de archivos abiertos
    open_file_cache max=1000 inactive=20s;
    open_file_cache_valid 30s;
    open_file_cache_min_uses 2;
    open_file_cache_errors on;

    server_tokens off;
    include mime.types;
    default_type application/octet-stream;

    # Optimizaciones de rendimiento
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;

    # Caché FastCGI
    fastcgi_cache_path /tmp/nginx levels=1:2 keys_zone=WORDPRESS:10m max_size=64m inactive=60m;
    fastcgi_cache_key "$scheme$request_method$host$request_uri";
    fastcgi_ignore_headers Cache-Control Expires Set-Cookie;

    # Configuración Brotli
    brotli on;
    brotli_comp_level 4; # Nivel de compresión reducido
    brotli_types text/plain text/css application/json application/javascript application/xml;

    # Encabezados de seguridad
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "no-referrer-when-downgrade" always;
    add_header Content-Security-Policy "default-src * data: 'unsafe-eval' 'unsafe-inline'" always;

    # Configuración SSL
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers on;
    ssl_session_cache shared:SSL:2m;
    ssl_session_timeout 1h;
    ssl_session_tickets off;

    # OCSP Stapling
    ssl_stapling on;
    ssl_stapling_verify on;
    resolver 1.1.1.1 1.0.0.1 valid=60s;
    resolver_timeout 2s;

    # Configuración de IP real
    set_real_ip_from 127.0.0.1;
    real_ip_header X-Forwarded-For;
    real_ip_recursive on;
    
   # CloudFlare IPs
   # List from: https://www.cloudflare.com/ips-v4
    set_real_ip_from 103.21.244.0/22;
    set_real_ip_from 103.22.200.0/22;
    set_real_ip_from 103.31.4.0/22;
    set_real_ip_from 104.16.0.0/12;
    set_real_ip_from 108.162.192.0/18;
    set_real_ip_from 131.0.72.0/22;
    set_real_ip_from 141.101.64.0/18;
    set_real_ip_from 162.158.0.0/15;
    set_real_ip_from 172.64.0.0/13;
    set_real_ip_from 173.245.48.0/20;
    set_real_ip_from 188.114.96.0/20;
    set_real_ip_from 190.93.240.0/20;
    set_real_ip_from 197.234.240.0/22;
    set_real_ip_from 198.41.128.0/17;
    # List from: https://www.cloudflare.com/ips-v6
    set_real_ip_from 2400:cb00::/32;
    set_real_ip_from 2606:4700::/32;
    set_real_ip_from 2803:f800::/32;
    set_real_ip_from 2405:b500::/32;
    set_real_ip_from 2405:8100::/32;
    set_real_ip_from 2a06:98c0::/29;
    set_real_ip_from 2c0f:f248::/32;

    # ModSecurity
    modsecurity on;
    modsecurity_rules_file /usr/local/etc/modsecurity/modsecurity.conf; 
    modsecurity_rules_file /usr/local/etc/modsecurity/crs-setup.conf;
    modsecurity_rules_file /usr/local/etc/modsecurity/ip_blacklist.conf;

    server {
        listen 8080;
        server_name "";
        return 444;

        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
            root /usr/local/www/nginx-dist;
        }
    }

    include conf.d/*;
}