[Pdns-users] Recursor LUA - trigger additional lookups

Radosław Ejsmont radoslaw at ejsmont.net
Mon Feb 12 16:31:31 UTC 2018

Yeah, know that you can set it for each client (Linux/Windows/macOS). My problem is many mobile clients (iOS) where setting this up is impossible. And Netflix / Amazon / whatever becomes an issue... so network-wide solution would be cool!

Sent from my iPhone

> On 12 Feb 2018, at 11:48, Brian Candler <b.candler at pobox.com> wrote:
>> On 12/02/2018 10:32, Radoslaw Kamil Ejsmont wrote:
>> My goal is to successfully resolve AAAA only for hosts that are IPv6 only and serve A only to dual-stack hosts.
> I can't answer your question about doing this inside PDNS, but just wanted to mention that you can configure individual hosts to prefer IPv4 over IPv6 when both are available.
> In Linux this is done by configuring /etc/gai.conf, e.g. for Ubuntu just uncomment this line:
> precedence ::ffff:0:0/96  100
> I don't really do Windows, but I understand the corresponding feature is called "prefix policies":
> https://support.microsoft.com/en-us/help/929852/how-to-disable-ipv6-or-its-components-in-windows
> https://sites.google.com/site/jrey42/Home/ipv6/prefixpolicies
> Regards,
> Brian.
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