No IPv6 WAN address
I followed this tutorial on how to enable IPv6 on my 5ᵗʰ Generation Airport Extreme. However, in the tutorial, the person had an IPv6 Address, but after completing the tutorial, I do not have an IPv6 Address. I have called Comcast and they confirmed that that IPv6 is available in my region. This is what my settings look like.
MacBook Pro, OS X Mountain Lion (10.8.4), 13-inch, early 2011