In your letter dated Fri, 29 Apr 2016 13:54:44 +0200 you wrote: >Disclaimer: Personally I think that the whole notion of reverse IP is >ridiculous, especially in IPv6. I proposed that we skip the whole >notion in IPv6, possibly providing some alternate, non-DNS, method to >get hostname from IPv6 addresses for the rare case where that is useful. > >However, administrators seem to really like reverse DNS. I don't know >why. It's a mystery to me, but they do. > >Having said all of that, I don't see any strong requirement that this >document provide motivation for reverse DNS solutions for IPv6. People >ask about the problem, and want solutions, and it would be good to have >a document to point them to with some help.
The problem I have with the current line of thinking (Section 2.4 in this draft) is that there is a big disconnect between where reverse DNS is needed and what ISPs are trying to do. Whether we like it or not, mail admins are adding reverse DNS checks. In fact, some really big mail providers require reverse DNS. Personally, I also like to see names in tcpdump output, but that's just a nice to have. So, ISPs not doing reverse DNS for IPv6, like my current ISP, are making it impossible to use your own mail server to deliver mail over IPv6. I think they are doing a serious disservice to the open internet. In any case, people operating mail servers have to be more technical than the average consumer. We are at the moment no where near just dropping a box at somebody's home and expecting that to be a well maintained mail server. But then, when reverse DNS is discussed, it tries to cater to the non-technical consumers. The group that has no need for reverse DNS at the moment. For me, the obvious starting point for reverse DNS is to just delegate the space of the prefix. Customers that want to run mail servers can also set up a DNS server. Instead there are too many options to automatic reverse DNS that are by and large not needed. _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop
