nginx

geo $maintenance {
        default yes;
        192.168.1.2 no;
}

server {
        listen 80;
        server_name domain.ru;

        root /var/www/domain;
        index index.php index.html index.htm;

        location / {
                if (-f /etc/nginx/maintenance.file) {
                        set $tmp clo;
                }
                if ($maintenance = yes) {
                        set $action "${tmp}se";
                }
                if ($action = close) {
                        return 503;
                }

                try_files $uri $uri/ /index.php?q=$uri&$args;
        }

        error_page 404 /404.html;

        error_page 500 502 504 /50x.html;
        location = /50x.html {
                root /var/www/domain;
        }

        error_page 503 /503.html;
        location = /503.html {
                root /var/www/domain/error/;
        }

        location ~ \.php$ {
                try_files $uri =404;
                fastcgi_pass unix:/var/run/php5-fpm.sock;
                fastcgi_index index.php;
                fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
                include fastcgi_params;
        }

}