unable to access newly created domain in nginx on ubuntu

recently was setting up magento in my local system, i did installed mariaDB, nginx and php7.1.

i did created new files in sites-available and did symlink as well. And i did run nginx -t there were no error looks everything fine but when i try the domain on browser, i can see a message which says site can’t be reached.

Can any one help me what might be the issue.

Please find the site configuration details

upstream fastcgi_backend {
         server  unix:/run/php/php7.1-fpm.sock;
}
server {
    listen 80;
    listen [::]:80;
    index  index.php index.html index.htm;
    server_name  dev.magento.com;

    client_max_body_size 100M;
    set $MAGE_ROOT /var/www/html/magento2;
    set $MAGE_MODE developer;
    include /var/www/html/magento2/nginx.conf.sample;
}