[arin-ppml] IPv4 Depletion as an ARIN policy concern

[Scott Leibrand]

Reusing the same ULA prefix would defeat the purpose (Uniqueness).  
Better to have the ISPs do random prefix generations for their clients.

Scott

On Oct 29, 2009, at 4:13 AM, <michael.dillon at bt.com> wrote:

>> Many people
>> mistake the fact that NAT requires a stateful inspection
>> gateway to function for security being provided by NAT.  The
>> security is not provided by NAT, it is provided by stateful
>> inspection"
>
> Why not redefine IPv6 NAT to be Network Access Taming (or some
> other T word) which carries out basic stateful inspection
> functions? Demand that vendors supply this stateful inspection
> in all routers and network access gateway boxes with the
> default setting of "turned ON".
>
>> NAT
>> allows you to utilize private network addresses for ALL your
>> internal devices.... which makes them unaccessable to
>> external traffic BY DEFAULT...and then allows you to assign
>> public IP's to ONLY those devices which are intended to be
>> externaly accessible.
>
> IPv6 with ULA allows you to utilise private network addresses
> etc., etc...
>
>> 2) NAT allows Network Admins the flexability to organize
>> thier own private address space and the assignment of IP's in
>> ways that logicaly make sense to them.
>
> IPv6 with ULA allows....
>
>> 3) NAT allows you to abstract your internal infrastructure
>> from the external services you present. This has alot of
>> utility.
>
> IPv6 with ULA allows....
>
> Perhaps every ISP should define a ULA /48 and then reuse that
> for every customer's internal addressing. In other words,
> instead of asking every customer to figure out ULA and
> allocate their own ULA /48, the ISP would say, "Here, just
> use this prefix for all your private addressing and use
> this other one for interfaces which need to be publicly
> accessible for incoming calls". It wouldn't even matter
> if a smart user, reused that ULA for their friends networks
> on another ISP, or published it in a magazine article
> resulting in thousands of sites thinking that ULA /48
> is the IPv6 private address range.
>
> We really need more articles published covering experiences.
>
> --Michael Dillon
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