[Dnsmasq-discuss] How to add AAAA record for host with dynamic prefix?

[Lonnie Abelbeck]

> On Feb 26, 2021, at 9:59 AM, Fred F <frederik.vogelsang at gmail.com> wrote:
> 
> Hi Matthias,
> 
> unfortunately I need the global addresses in DNS, as that's the only
> way for me to reference the hosts in firewall rules (FreeBSD's packet
> filter supports DNS aliases natively). So unfortunately ULA does not
> help in this situation. I need global IPv6 addresses (with dynamic
> prefixes) in DNS.
> 
> 
> Thanks and best regards,
> Frederik

Hi Fred,

I have a similar situation as you, and for years have implemented IPv6 NPTv6 (Network Prefix Translation) at the edge ... the  NPTv6 mapping is automatically updated when my GUA Prefix changes.

All my internal IPv6 addresses, firewall rules, etc., are ULA.  This is particularly useful for supporting failover external interfaces, and VPNs.

The "con", (maybe a "pro") is most network stacks choose GUA-IPv6 over IPv4, but IPv4 over ULA-IPv6.

Lonnie