We’ve always had good luck with AT&T but recently we had not-so-good-luck.  Today they replaced our modem and it wasn’t working with our Linksys WRT54G.  After several hours on the phone, and being told I could pay someone to make it work, I found the solution.  I am posting this in the event I forget how to make this work should it happen again.

The F90 modem I was provided does not have the standard Westell software on it.  It has a custom AT&T configuration menu that didn’t match the instructions for “Bridged Ethernet Mode”.

  1. Plug the LAN cable from modem directly into your PC/laptop
  2. Navigate to http://192.168.1.254
  3. Under advanced, click “Connection Configuration”
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  4. Enter the 10-digit access code that is printed on the sticker on the bottom of your modemimage
  5. At the bottom of the connection configuration screen select “Yes, use public IP address.”image
  6. Click Save Changes. 
  7. After the modem resets, unplug the LAN cable from the PC/Laptop and plug the cable back into the Internet port on the Linksys
  8. Restart the Linksys
  9. Connect your Laptop/desktop to the Linksys (via wireless or LAN cable to one of the ports)
  10. Smile.  You should have Internet access again