[arin-ppml] The role of NAT in IPv6

Gary T. Giesen ggiesen at akn.ca
Thu Apr 15 18:01:50 EDT 2010

On Thu, 2010-04-15 at 17:48 -0400, Chris Engel wrote:
> Gary T. Giesen wrote:
> > As Owen has pointed out many times, the cost of supporting
> > NAT is rarely borne by the person implementing it. It's borne
> > by everyone else trying to sell services to the the NAT'd customer.
> So let me get this straight, you're complaining that your customers demand support for X functionality (NAT or fill in whatever blank you want) in the services that you are trying to sell them and then assert how unfair it is that you have to carry the costs of meeting your own (potential) customers demand?
Actually what I'm really arguing for is for people to understand in IPv6
you don't generally need NAT (with the arguable exception of a few
corner cases, which even those can be resolved). 

I'm arguing for people not to take the same perceptions they have about
how things work in IPv4 and apply them to IPv6 just because it's
familiar and comfortable. I'm arguing for a new way to do things in IPv6
(and as the creators of IPv6 seem to have intended). 

I'm arguing that IPv6 is not just IPv4 with more addresses (although
that, in and of itself, changes things). They're getting used to a new
protocol anyways, let's go that extra step and educate them about what
IPv6 offers, and why they don't have to do things the old way (and why
the new way is better).

What I'm saying is that if we all agree the support costs for supporting
a customer who is NAT'd compared to one who is not (even if they're
using a stateful firewall) are greater, and that in IPv6 land I can show
there's no longer any useful reason for NAT (and we can eliminate the
arguable corner cases) then why would we pollute our nice shiny new
protocol with the ugly beast that is NAT.

> Let me introduce you to this concept called a "free market economy".
There's never been a free market economy in IP allocations... Otherwise
I might be acquiring IPs from eBay rather than ARIN. 
> Christopher Engel
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