В чем может быть ошибка настройки Nginx?

server {
    listen 80;
    root /var/www/server.com/public;
    index index.php index.html index.htm;
    server_name server.com;

    location / {
        try_files $uri $uri/ /index.php$is_args$args;
    }

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