Security Best Practices in Nginx

# Hide Nginx version
server_tokens off;

# Security headers
add_header X-Frame-Options "SAMEORIGIN" always;
add_header X-Content-Type-Options "nosniff" always;
add_header X-XSS-Protection "1; mode=block" always;

# Rate limiting
limit_req_zone $binary_remote_addr zone=api:10m rate=10r/s;

# IP restrictions
location /admin {
    allow 192.168.1.0/24;
    deny all;
}