[arin-ppml] Why are ISPs allowed?

Keegan.Holley at sungard.com Keegan.Holley at sungard.com
Fri Jan 2 17:13:10 EST 2009


It is an interesting idea though.  As IPv4 space becomes more and more 
scarce and as a result more and more valuable I wonder if it would be 
possible to start natting and then assign customers public TCP/UDP ports 
rather than IP addresses.  This would be for small businesses and 
individual users of course, but it would save some addresses.  I think 
making something like that mandatory would be a mistake though.


> NAT enforces the client-server model. I can think of a LOT of reasons 
> why I would not use an ISP that enforced NAT upon me. The main one 
> being that I could only use my Internet connection for sessions I 
> initiate.... In other words, I'm buying about 1/2 of a connection to 
> the Internet... Actually, I'd not be buying a connection "to" the 
> Internet at all, only a connection "from" the Internet.
> 
> Once two people who wish to communicate are both behind such 
> providers, there is no way they can send data to each other without 
> using a third party somewhere... which is to me a real waste of 
> resources.
> 
> On Jan 2, 2009, at 3:24 PM, Artur (eBoundHost) wrote:
> 
> > My apologies if I'm asking a question that has been answered a million
> > times, I have not been able to find an answer.
> >
> > Is there a reason why ISP's such as Comcast/ATT, allowed to hand out
> > unique IP addresses, even not static ones, to end users? Why are they
> > not required to use NAT?
> >
> > If ISPs were to switch to local address space, how many IP blocks 
> > would
> > be released back into the wild?
> >
> > -- 
> >
> > Best Regards,
> >
> >
> > Artur
> > eBoundHost
> > http://www.eboundhost.com
> > _______________________________________________
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> Cort Buffington
> Executive Director
> The Kansas Research and Education Network
> cort at kanren.net
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