On Oct 21, 2010, at 8:26 AM, Patrick Giagnocavo wrote: > On 10/21/2010 11:08 AM, Jeroen Massar wrote: >>> On 2010-10-21 16:59, Patrick Giagnocavo wrote: >>> Are IPv6 connected machines unable to access IPv4 addresses? >> >> Unless you put a application/protocol translation in the middle IPv6 >> can't talk to IPv4. yahoo("IVI","Ecdysis NAT64") for two possibilities >> one have for that, oh and yahoo("IPv6Gate") for a ready-to-use HTTP >> specific one. >> >> But if you didn't know that fact, you might want to invest in a proper >> book about IPv6 and read up quite a bit. As this is NANOG, a good >> operational book is "Running IPv6". >> > > Thank you for the book recommendation; however, I was trying to get an > admission that any IPv6-connected end users or corporate connections, > will be accessing IPv4-only resources for a long time to come, i.e. > years and years. > > And that the responsibility for IPv6 to v4 connection won't have to be > handled by my client with a few racks. > Noone can confirm that for you because it is largely untrue.
IPv6-connected end users MAY have some ability to reach your IPv4-only site. This will be through something that looks like a LSN device at best so you won't have working things like: Geolocation UPNP reverse connection mapping Most forms of NAT-T Most forms of P2P Logs that represent unique IP addresses visiting your site in a meaningful manner. etc. Owen