Implementing 464XLAT at a small WISP

Mark Andrews marka at
Thu Dec 28 01:49:00 CST 2017

> On 28 Dec 2017, at 11:45 am, Brock Tice <brock at> wrote:
> We recently deployed our first half-dozen IPv6-only customers after 6+ months of testing, using 464XLAT.
> It took me ages to sort all this out, so I hope someone finds this helpful. Feedback very much welcome.

If all you want to do is 464XLAT you don’t need a nameserver that supports DNS64.  Just add a zone with the appropriate AAAA records to your recursive servers.

The following provides the 464XLAT translation with the well known NAT64 prefix. SOA . . 0 0 0 0 0 NS . AAAA 64:ff9b:: AAAA 64:ff9b:: A A

Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742              INTERNET: marka at

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