|Does this computer connect directly to the att broadband modem or do you connect to a router which is in turn connected to the att modem?|
One possibility (if connected directly to the att modem) is that you need to connect using a pppoe (point-to-point-protocol-over-ethernet) connection. pppoe uses your att user name and password in its configuration when connecting to the att service.
If on the other hand, you have a router connected to the att modem, your computer should connect to the router using a standard LAN (ethernet) connection since the router handles the pppoe
connection for your entire LAN (it acts as
your LAN's gateway to the Internet).
If you have more than one computer connected
directly to the att modem you should check that the modem is designed to connect more than one computer to the Internet. If the modem has one ethernet port (looks like a big phone jack) and one USB port, it is designed to connect one single computer to the Internet. You can use either the ethernet port or the USB port, but NOT both at the
same time. To connect more than one computer to the att modem, you will need a router (connect your computers to the router, then connect the router to the att modem. Configure the computers to connect to the router using a standard network (LAN) connection. Configure the router to connect to the att modem using pppoe.
These are the hardware issues of which I am aware. If none of these apply, then you may have to check with your att customer service to make sure your user ID and password are correct (they will usually be case sensitive - 3b1a4 is not the same as 3B1a4 or 3biA4). They will not support Linux (shame on them), but they should be willing to help you confirm your configuration information. I use a cable connection here because I do not like DSL or ADSL because it requires the additional complexity of pppoe configuration, so I can not be of much help with configuring the att service. Good luck,
Ernie Registered Linux User 247790