VOIP Tech Chat → [Primus] Dlink connection through Port 2

I've changed the Gateway to work through Router Port 2 instead of the DMZ for security. All I did was just shut down everything, Disable DMZ, moved connection to Port 2 and rebooted everything and it worked fine.
1. Am I missing something, I thought I had to forward ports or something.
2. Now I still am unable to get to the Dlink administration page (if there is one) like my Linksys has using it's IP to make adjustments/changes.
I could use some guidance.