All, RPZ is a technology developed by Vernon Schryver and Paul Vixie which acts as a way to encode DNS filtering rules for resolvers in the DNS itself. There is currently a draft about this under discussion in the IETF DNS operations working group: https://tools.ietf.org/html/draft-vixie-dns-rpz https://www.ietf.org/mail-archive/web/dnsop/current/maillist.html This draft was brought up recently on the RIPE anti-abuse working group mailing list: https://www.ripe.net/ripe/mail/archives/anti-abuse-wg/2017-January/003744.ht... As is typical for DNS topics, there are lots of strong opinions and some interesting technical bits. Rather than have one topic being discussed in many different places within RIPE, it probably makes sense to keep the discussion on the existing threads, or at least on those mailing lists. However I thought I would mention it here in case anyone is interested and not yet aware. Cheers, -- Shane