I encountered this article, perhaps worth seeing a lay-person's views on the subject. If not, however, I particularly like the little excerpt they use to some up NAT discussions: <http://arstechnica.com/articles/paedia/ipv6.ars> This is usually when someone brings up NAT. Home routers (and a lot of enterprise equipment) use a technique called "network address translation" so that a single IP address can be shared by a larger number of hosts. The discussion usually goes like this: "Use NAT, n00b. All 1337 of my Linux boxes share a single IP and it's safer, too!" "NAT is not a firewall." "NAT sucks." "You suck." </http://arstechnica.com/articles/paedia/ipv6.ars> -Thomas Gal tgal@xxxxxxxxxxx -----Original Message----- From: bmanning@xxxxxxxxxxx [mailto:bmanning@xxxxxxxxxxx] Sent: Thursday, March 08, 2007 4:16 AM To: michael.dillon@xxxxxx Cc: ietf@xxxxxxxx Subject: Re: NATs as firewalls On Thu, Mar 08, 2007 at 11:22:05AM -0000, michael.dillon@xxxxxx wrote: > > In any case, I don't have any examples to present since most of the > reclamation that has been done over the past few years was done without > any fanfare. The RIRs and the organizations involved are really the only > ones who know the details. Bill Manning was somehow involved in > identifying blocks to be reclaimed so he may be able to provide some > illumination without heat. > > --Michael Dillon > predating the existance of ARIN, LACNIC, and AFRINIC, i worked with the permission of the then IANA and our team reclaimed 14% of the total IPv4 space and put it back into the freepool. We could have done more (estimates of another 6-8% were feasable) but we ran out of funds and the IANA ceased being the registry of first/last resort. Time, processes, administrative thinking, and other factors have changed, which lead me to believe that reclaimation - as such - will not happen again to any noticable degree. --bill _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf