nginx.conf

worker_processes auto;
worker_rlimit_nofile 65535;

events {
    worker_connections 2048;
    multi_accept on;
    use epoll;
}

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

    # Performance optimizations
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    variables_hash_max_size 2048;
    variables_hash_bucket_size 128;

    # Buffer size optimizations
    client_body_buffer_size 128k;
    client_header_buffer_size 1k;
    client_max_body_size 10M;
    large_client_header_buffers 4 4k;

    # Security headers
    map $http_upgrade $connection_upgrade {
        default upgrade;
        '' close;
    }

    # Rate limiting and DDoS protection zones
    limit_req_zone $binary_remote_addr zone=api_limit:10m rate=10r/s;
    limit_req_zone $binary_remote_addr zone=ws_limit:10m rate=5r/s;
    limit_conn_zone $binary_remote_addr zone=conn_limit:10m;
    limit_req_status 429;
    limit_conn_status 429;

    # Block common attack patterns
    map $http_user_agent $bad_bot {
        default 0;
        ~*(curl|wget|python|nikto|sqlmap|nmap|xrumer|masscan|libwww|burpcollaborator) 1;
    }

    map $request_uri $bad_request {
        default 0;
        ~*\.(php|asp|aspx|jsp|cgi)$ 1;
        ~*(/wp-admin|/wp-login|/administrator|/admin|/phpmyadmin|/xmlrpc\.php) 1;
    }

    # File cache settings
    open_file_cache max=2000 inactive=20s;
    open_file_cache_valid 60s;
    open_file_cache_min_uses 2;
    open_file_cache_errors on;

    # Compression settings
    gzip on;
    gzip_vary on;
    gzip_comp_level 6;
    gzip_min_length 256;
    gzip_proxied any;
    gzip_types
    application/javascript
    application/json
    application/x-javascript
    application/xml
    text/css
    text/javascript
    text/plain
    text/xml;

    # Security settings
    server_tokens off;
    client_body_timeout 10s;
    client_header_timeout 10s;
    send_timeout 10s;
    reset_timedout_connection on;
    proxy_connect_timeout 60s;
    proxy_send_timeout 60s;
    proxy_read_timeout 60s;

    # SSL settings
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_prefer_server_ciphers on;
    ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
    ssl_session_cache shared:SSL:10m;
    ssl_session_timeout 1d;
    ssl_session_tickets off;

    # Logging configuration
    log_format detailed '$remote_addr - $remote_user [$time_local] '
    '"$request" $status $body_bytes_sent '
    '"$http_referer" "$http_user_agent" '
    '$request_time $upstream_response_time '
    '$http_x_forwarded_for $http_x_real_ip '
    '$connection $connection_requests';

    access_log /var/log/nginx/access.log detailed buffer=32k flush=5s;
    error_log /var/log/nginx/error.log warn;

    # Load balancing configuration
    upstream backend {
        server app1:8080 max_fails=3 fail_timeout=30s;
        server app2:8080 max_fails=3 fail_timeout=30s;
        keepalive 32;
        keepalive_requests 100;
        keepalive_timeout 60s;
    }

    # Include site configurations
    include /etc/nginx/sites-enabled/*;
}