I have Cox for an ISP, and I have gone through two or three routers over the years. I am currently on a Netgear that works fine. However, in the last 2 months I have tried to install a Linksys WRT54GP2, as well as two other routers (another Netgear and a Sonicwall). None of these 3 routers will ever get a DHCP address from Cox. When I plug the cable modem directly into my computer's NIC, I get an address immediately. I then route the cable through my Netgear, and reset the modem, and get an address immediately. No matter what I do, though, the Linsksys won't get an address. I have verified that it works on another internet connection. Same goes for the Sonicwall and newer Netgear. Cox says there is no problem on their end, and Linksys and Netgear and Sonicwall support all say the same, as their routers work fine on other connections. I have tried the basics, such as cloning the MAC address of my PC, and even of the working Netgear router onto the Linksys with no luck. Host names aren't required by Cox, but I've tried that as well. In my 10 years as a network admin, I have never seen anything like this. Anyone have ideas? One more note. The Sonicwall worked fine up until 3 months ago. It still works fine on other networks....just not on my Cox connection.