[atlas] Tagging probes which are using the ISP's DNS server?

On Thursday, 6 October 2022 19:42:58 EEST netravnen+ripelist at gmail.com wrote:
> On Thu, 6 Oct 2022 at 13:32, Simon Brandt via ripe-atlas
> 
> <ripe-atlas at ripe.net> wrote:
> > If the distinction isn't to difficult to implement, I would prefer these
> > three types as system tags:
> > 
> > Inside-AS DNS
> > Outside-AS DNS
> > RFC1918 DNS
> 
> Agreed, these three tags would IMO satisfy *most* use cases. Certainly
> mine, too.
 I'm now curious how that would work with dual-stack probes using different 
providers for v4 and v6...

My probe uses my local Provider for v4 and HE for IPv6 (static /48 network 
with reverse dns delegation would never be possible from my local provider).
According to that logic, using my local router as dns server for the probe, 
could set all three tags depending on the used dns server.
As an example depending on the transport protocol used for dns:
- v4 uses RFC1918 IP as resolver IP and inside AS DNS Server
- v6 uses public IP of subnet and resolves via a different AS if the query is 
sent over v6 
It could also be argued, that the v6 case is still Inside-AS DNS, but it 
should be clear how the tags are determined.

Or is this case in the meantime special enough to ignore it due to the rising 
native v6 rollout by providers?