December 12, 2011 3:24 AM

I found a solution- sort of...
I discovered that if I connect another router directly to my cable modem (on a different subnet) and then connect my E3000 to that one- it works!

I don't know if this is some strange problem with my E3000 or dd-wrt, and I certainly can't explain why the DHCP client setting connects to my other local router but not to the cable modem... It's very strange! But at least I got it working.