On Thu, Dec 10, 2020 at 05:29:46PM +0000, Ray Bellis <ray@isc.org> wrote a message of 20 lines which said:
Is there any RIPE policy about whether nodes that are subject to DNS interception should be excluded from results (or maybe even dropped altogether) ?
I disagree. The point of RIPE Atlas probes is to test the Internet AS IT IS, not as we would like it to be. (Otherwise, I would drop the probes behind NAT…)
While these probes are perhaps still useful for ping and traceroute tests, they are effectively useless for DNS related tests other than as a proxy measure for how prevalent that practise actually is.
Which is an important use.
If there was a heuristic that could be applied on the probe itself or within the RIPE data collector that tagged the probe as having "bad DNS" that would help a lot.
Adding a tag is indeed a good idea, but not excluding or dropping these probes.