Can't access magento2 website through port forwarding
I am using Ubuntu 14.04 with apache2. Installed Magento2 on /var/www/html/magento2/ . I am able to access magento2 website on Intranet through http://<ip address>/magento2. I want to access this from web, for this I did port forwarding on my router and open Port 80, but I can't access magento2 website from web. It showing blank page.
For testing, I created sample website in /var/www/html/test.com, and I can access this from Internet.