Using NAT64 for IPv6 only DNS resolvers

Mark Andrews marka at
Mon Mar 15 20:40:29 UTC 2021

There is an open issue
and merge request
to do this.

That said you should be asking your OS vendors why they are not providing/enabling
a CLAT implementation.  You could also look at using one of the other IPv4AAS (IPv4
as a service) solutions that doesn’t require manipulating the DNS, nor dual application
layer translation (e.g. DS-Lite, MAP-E).


> On 16 Mar 2021, at 01:24, Nico Schottelius <nico.schottelius at> wrote:
> Good morning,
> I was wondering whether it is possible to configure IPv6 only BIND
> resolvers to make use of a NAT64 prefix for outgoing requests?
> I.e. the following situation:
> - Resolver = 2001:db8::1, IPv6 only
> - NAT64 prefix = 2001:db8:1:c001::/96
> Now if bind sees NS a.b.c.d, can we make bind reach out to
> 2001:db8:1:c001::a.b.c.d instead of trying to open up an IPv4 connection
> to a.b.c.d?
> This would be very helpful, as we more and more have IPv6 only hosts,
> which only have access to the Internet via NAT64.
> Note: this is not the same problem as enabling DNS64 for *clients*,
> but very similar.
> Best regards,
> Nico
> --
> Sustainable and modern Infrastructures by
> _______________________________________________
> Please visit to unsubscribe from this list
> ISC funds the development of this software with paid support subscriptions. Contact us at for more information.
> bind-users mailing list
> bind-users at

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

More information about the bind-users mailing list