Netopia 7000 router

SOURCE: Siements 5890 router

When you say HQ is that outside on the wan port trying to ping the Lan port?
Sometimes the router itself will respond to a ping but will not pass ping requests thru as the internal firewall can never be fully shutoff unless you are running your cisco switch as a DMZ 
also are you connecting your other pc's to the cisco or to the 5890.
Instead of shutting off the firewall completely try enabling bridge mode and give your cisco the outside IP addy.

SOURCE: port forwading

http://portforward.com/
this site may be of some assistance

SOURCE: Getting PS3 NAT Type 2 with Netopia Router ???

I have nat type 1 with this router but no upnp. access your router. click on advanced setup, click on configure, click on connection, choose ppp over ethernet llc/snap scroll down and click on save and restart connection. call your internet provider and get the username and password for your router. you will need it later. on your ps3, go to network settings, select internet connection settings. the ps3 will ask if you want to continue, select yes.select custom, wired connection, auto detect, PPPoE, enter the username and password you got from your isp, select automatic, automatic, do not use, enable, then press the x button to save, press the x button again to test connection

SOURCE: ps3 setting up static nat

are you in ireland and with eircom?

SOURCE: Getting PS3 NAT type 2 with Netopia router!

u should have dmz on router. but if not u can try your modem. that was my issue. i still use router for connection and stuff but i enables ip/dmz to pass through on my modem and it changed to type 2 more info email me at [email protected] on add me i believe my ps3 thing is ADV_WARfighter