Internet Security

I have a home network linked by a wireless Linksys Router-2 pcs. Also have ZoneAlarm. Initially, grc.com’s Shields Up Test showed my pc in a stealth mode.This was the orginal Shields Up test which tested only a handful of ports. The new Shields Up Test looks at 1,056 ports. I am “stealthed” in all but ports 0 and 1. I have wrote GRC and Linksys but to no avail-no reply. My question is-
what can be done to stealth these ports? Thanks.