Opening ports

for my My Net N900 Dual-Band Router, how do I open other ports? I accessed Security/Firewall , see

Source IP Range    Destination IP Range   and  Port Range

I need to be able to fully unrestricted and accessible, both inbound and outbound some ports. (4 of them)

any help appreciated

Check if the steps to forward the ports help.

http://www.wdc.com/wdproducts/library/UM/ENG/4779-705072.pdf#page=75