I have a Linksys WRT320N with Comcast as the ISP.
My Xbox has the external wireless adapter, recognizes the network, connects to the network and the internet, but fails connecting to xbox live.
Before the switch to Comcast (yesterday), the router worked fine. I can't seem to figure it out this time.
I got the ICMP error, xbox live works with the modem plugged directly in, but this is not a practical setup in my home.
Please help, thanks.