I'm housesitting for my dad and within an hour I managed to knock out the internet connection to the whole house.
The router is a Westell A90-9100EM15-10. I was able to connect 2 iphones and an ipad to the wireless, but my Windows 7 64-bit PC on the wired connection wouldn't work as I was getting an error (the yellow triangle with exclamation point). I was able to fix that by enabling IPv4 to automatically obtain an IP address, instead of the static IP I used on my own home network and now everything seems to be working fine.
So then I try to play starcraft 2 and the blizzard updater just hangs. I assume this is a port forwarding issue. I go to router settings at 192.168.1.1 and see my PC showing as the static IP still and open all the TCP/UDP ports for the PC IP address and logout of router settings. Now the router is cycling through a reboot every 30 seconds and nobody can connect on either wired or wireless. Not sure if this is because of the port forwarding, but I can't get back to the settings to undo that now.
Hope this makes sense, thank you for the help, let me know if more info is needed.