comcast ipv6 PTR

Tue Oct 15 17:40:39 UTC 2013

> > My cable company assigns me a different prefix every time the modem
> > reboots, about once a month, and I think that's pretty typical.
>
> Really?
> I think my IPv6 address form Comcast has changed (maybe) twice in the 
last
> 18 months, and I think it was only once.

Could it be a non-persistent DUID on the CPE maybe? It tends to get more 
rare as home router implementors get their IPv6 right, but we still see 
some in the wild. (it makes an interesting attack vector also...) 

/JF