In message <201102041140.42719.lo...@pari.edu>, Lamar Owen writes: > On Friday, February 04, 2011 09:05:09 am Derek J. Balling wrote: > > I think they'll eventually notice a difference. How will an IPv4-only inter > nal host know what to do with an IPv6 AAAA record it gets from a DNS lookup? > > If the CPE is doing DNS proxy (most do) then it can map the AAAA record to an > A record it passes to the internal client, with an internal address for the > record chosen from RFC1918 space, and perform IPv4-IPv6 1:1 NAT from the assi > gned RFC1918 address to the external IPv6 address from the AAAA record (since > you have at least a /64 at your CPE, you can even use the RFC1918 address in > the lower 32 bits.... :-P). > > This may already be a standard, or a draft, or implemented somewhere; I don't > know. But that is how I would do it, just thinking off the top of my head. >
DS-lite delivers a IPv4 softwire over a IPv6 upstream. It also introduces less problems than NAT64 as it works with DNSSEC and with IPv4 literal. Along with DS-lite there is a UPNP replacement designed to work with distributed NATs (DS-Lite (AFTR+B4) and NAT444 (LSN + CPE NAT)) so that holes can be punched threw multiple devices if needed. -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org
