Hey brian,
I’ve been working on this for a few days as well, as far as I can tell the kernel isn’t built with the iptables modules.
After some searching I’ve tried using mod_probe and the modules are not available for the kernel compiled using that guide. I’ve also tried using the pre-built kernel of the tech page, and also had no luck,
If you can figure out how to make this work, please post your solution.
THANKS!!