OK, I understand. However, just to clarify, the two entries I listed above were not in my LinkSys by default, I manually added them to the sections noted.

DMZ is demilitarized zone. What that does is remove all rules from one computer to allow it to act as a server. Generally, you don't want to do that unless you really want anyone to be able to access that computer, or you set up a software firewall on that machine.

I'll wait and see if anyone familiar with the Zyxel router chimes in before I offer any suggestions that might or might not apply to your router.