There are FAQs for various types of VPN configurations on http://support.dlink.com
I understand you are new to this product and a little overwhelmed, but the number of threads I am seeing that are just asking for FAQs, or where the answer is to run the Start-up Wizard, is starting to get excessive.
This is not a forum for requesting documentation, what is available will be on http://support.dlink.com or possibly http://security.dlink.com.tw please utilize these resources if documentation if your goal.