Comcast IPV6

Jeff Forman put up a blog post on his website detailing how he got the Comcast IPV6 working through the trial. His setup explains exactly how to do this if you’re trying to get it to work on a Linux box, but not how to do this on your router and put it through your entire network. I’m running the custom DD-WRT build by crushedhat that gets IPV6 working, and have been using it with a HurricaneElectric tunnel for awhile. With the help of my friend whfsdude on Mozor I’ve been able to make this work. I can’t guarantee that it will work for you, and whenever you’re trying to install custom firmware on a router, you should be careful, as you can brick your router.

First off, you may want to read through Jeff’s post. You’re going to need your WANIP as he calls it, and you’ll need it converted into HEX.

To start with, in DD-WRT, you need to enable IPV6 and RADVD in Management. In the config section, put something like this:

Then, in the Commands tab, you need to run the following for startup:

Additionally, due to the security vulnerability found in DD-WRT (patched already, but not in crushedhat’s build), you should run the following firewall script:

That’s it. It was easy for me because I just swapped my he settings for the comcast ones that Jeff (and whfsdude) provided. It may not work for you, but good luck!