It’s not a list I’m afraid, but the OpenDNS/Cisco resolvers do ECS. The opt-in is with the authority although we plan to look at making this happen automatically at some point, as managing a list of authorities Is becoming quite a burden.
When we receive ECS from a client, we ignore it unless the prefixlen Is zero (in which case we don’t send ECS upstream). This is as a result of being contractually obliged to disallow client ECS probing. Our opt-in config is based on the nameserver and/or the zone. This gives us flexibility but can cause problems when the upstream changes some of their nameserver names... Not sure if this is helpful. — Brian > On Jun 24, 2020, at 6:10 AM, Jan Včelák <j...@fcelda.cz> wrote: > > Hello. > > I'm looking for a list of public resolvers that utilize EDNS Client > Subnet when sending queries to authoritative servers. I'm especially > interested in the ones that require some kind of opt-in to enable the > feature. Is anyone aware of such a list? > > Thank you. Regards > > Jan / NS1 > _______________________________________________ > dns-operations mailing list > dns-operations@lists.dns-oarc.net > https://lists.dns-oarc.net/mailman/listinfo/dns-operations _______________________________________________ dns-operations mailing list dns-operations@lists.dns-oarc.net https://lists.dns-oarc.net/mailman/listinfo/dns-operations
