IPv6 rDNS subdelelgation

iwfjacob

• October 19, 2018 13:48

Greetings! If this has been posted elsewhere, please forgive me -- I was unable to find it. I'm looking in to how to subdelegate rDNS authority from a /32 IPv6 (authoritative) for a customers /48 (their nameservers) Google'ing pointed me in the direction that I *might* be able to simply add the trailing nibble to the /32 ip6.arpa zone with an NS record to the customers DNS servers, unfortunately that does not appear to be working. Example: let's say we have 2204:6c80::/32 we'd make the zone: 0.8.c.6.4.0.2.2.ip6.arpa And we could do whatever PTRs we want there b.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.1.0.0.0 PTR my.domain.com I was hoping/thinking based on that article I found, if for instance we wanted to delegate 2204:6c80:e::/48 to a downstream DNS server we could (much like classless IPv4 delegation) go: e.0.0.0 NS downstream.server.com. That does not appear to work though. Any thoughts?

• 

  Infopro

  • October 19, 2018 19:01

  This recent thread may be of some use to you:

  0
• 

  iwfjacob

  • October 19, 2018 19:04

  Thanks, unfortunately that just covers PTRs and does not cover subdelegation.

  0
• 

  cPanelLauren

  • October 24, 2018 20:02

  Hi @iwfjacob From what I understand this should work in the same manner, in fact, while discussing this with one of our senior analysts he was able to set this up successfully. Our assumption is that there is potentially a small discrepancy in the record created. He noted the only time it's going to get complicated is if your delegation doesn't land on a "nibble" (4 bits) which is where you get a clean separation between "subdomains" but 32 and 48 are good, in that regard, they divide by 4 just fine. Can you possibly provide some further information on why or what didn't work when you set this up? Thanks!

  0

Please sign in to leave a comment.