TomatoUSB

Just got a belkin n300 and flashed to toastman 1.28.75 rt ext. I am trying to use it with a motorola sb6121 cable modem with comcast service.

Computer connected directly to the modem works fine, the computer obtains an ip address via dhcp, but when I put the router between the modem and the pc the router cannot get a ip address from the modem (also set to obtain an address by dhcp) Just seems to be stuck on renewing.

I have tried different cable and power cycling each component.

Bringing the router to my office it obtains a wan IP address from another tomato router just fine.

edit: reading up on the issue it looks like I need to have the modem unplugged for a longer time or clone my laptop mac address to the router. won't be able to try it out until this evening.

How do you authenticate your account/password with Comcast if your router is using DHCP and connected directly to a modem? I am not a Comcast customer so please forgive my question, but should you instead be using PPPoE to connect (which will authenticate you and then assign an IP address like DHCP does)?

How do you authenticate your account/password with Comcast if your router is using DHCP and connected directly to a modem?

You do not authenticate with account/password in this scenario.

What scenario Karog? Comcast does not require authentication, or DHCP does not support authentication (which was my point)?

I am not familiar with Comcast so I couldn't say if they require user authentication or not, but if they do then perhaps he needs the WAN to be using PPPoE instead.

What ip adress do you optain from modem when you connecting direct ?

just me

Comcast does not require user authentication for a router connected to the modem on their cable internet system.