Spectrum residential IPv6 rDNS - thank you !

Wed Oct 10 01:43:33 UTC 2018

Hi,

On 9/10/2018 11:37 PM, endre.szabo at nanog-list-kitfvhs.redir.email wrote:
> I wonder how they generate these rDNS PTR records? I was always curious, 
> hope someone knows.

I do it for our various IPv6 (and IPv4) allocations by using PowerDNS 
with a remote backend. If there is no existing PTR record defined the 
query gets sent to the remote backend which generates the PTR based on 
the IP address. The same thing happens for A/AAAA record requests, if 
the A/AAAA record for the PTR does not exist it will also be generated 
based off the hostname provided as long as the hostname matches a record 
that would have an automatic PTR generated.

Originally I was using the pipe backend with a modified copy of 
"PowerDNS-Dynamic-Reverse-Backend" 
(https://github.com/endreszabo/PowerDNS-Dynamic-Reverse-Backend) but 
ended up writing my own in Perl as the backend was a bit fragile and 
didn't do everything I wanted.