Lee Howard wrote: > I’m revising draft-howard-isp-ip6rdns again. Several folks have said > something like, “There should be no expectation that a residential ISP > will populate PTRs for all of its customers.” When I started this > document, five or six years ago, there didn’t seem to be consensus on > that point. I hear a lot of support for it these days, and disdain for > people who rely on PTRs. (I think we generally agree that PTRs for > servers are good). > > Is there consensus now that ISPs don’t need to provide PTRs for their > customers?
i can't judge consensus, but i would join one on this point. manufacturing PTR RR's for every IoT device we connect is crazy talk. in 1995 or so william simpson proposed an ICMP message to ask an endpoint its name, and at the expected density, this is still a better plan for anything that's not a server. note that i will continue to filter my inbound SMTP based on the presence/absence of a PTR. in other words if the consensus turns out to be that other than for "servers" PTR's are unnecessary, we'll be helping anti-spam. -- Paul Vixie _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
