Quite suddenly, my modem works if I plug it into a machine, but not when I plug it into an Airport Express. Comcast says it's not their fault. Any idea what's going on? Every detail I can think of is inside.
Last night, when my wife and I got back from a trip, our internet was crawling along at an ungodly pace. I unplugged and replugged both my modem and my Airport Express to no avail.
This morning, I called Comcast to see if there was a problem with our service. They reset the modem on their side. Speed improved from .01 mbps to 6 mbps, but before our vacation we'd been getting twice that. The Comcast person on the phone had me plug my modem into my laptop, bypassing the Airport Express. This put the speed back to normal. His advice was to replace my old Airport Express.
I got a new Airport Express, came home and plugged the modem into it, but while the Airport shows a signal, I can't get online. When I tried to troubleshoot through the Airport Utility, it says the Airport is having an internet connection problem as it does not have a valid IP address.
Basically, both my wife's PC laptop and MacBook can see the wireless network the Airport created, but there's no internet. It's a similar issue to what davidmac had
The internet still works when plugged directly into either computer. I tried the old Airport Express (which was functional but unusably slow before), but it doesn't work now either.
I've unplugged and replugged both my modem and the Airport. I also did a hard reset and tried the setup again. I called Comcast again, and they said they didn't see an error on their side so I had to take it up with Apple. Apple's feeling is that Comcast's issue for not passing along a valid IP address.
We've been getting wireless internet using an Airport with Comcast for the last five years so I'm unsure as to why things would suddenly stop working now.
Is there an obvious thing wrong that I'm missing? Are both the Airports suddenly duds? What do I do next?