They could delegate authority for your block to you, but breaking up PTR
zones smaller than a class c is a royal pain in the butt. Personally I
avoid it when I can. SBC will not set reverse DNS for you so delegation
is the only option and we've done it there. In order to do it with
gnatbox dns you have to create some pretty ugly zone names, and BIND
isn't a walk in the park either.
To sum up again, keep doing it the way you are now unless you have a
driving reason to change it.
Chris Green
David Morris wrote:
I use my GNATBOX as the external DNS for my domain (xpasc.com).
My ISP has delegated the reverse lookup for
65.85.17.142
as
email.xpasc.com
This is in fact the forward name ... and this has been sufficient for
many years to pass spam filters so I've not dug any deeper. But
now I'm getting more and more grief.
Question 1. Has the ISP done the correct and logical thing here?
If not, what is the best practices way for them to delegate my 16 IP
subnet so GNATBOX rDNS will respond properly?
If this is appropriate ... how do I fill in the GNATBOX rdns setup so that
65.85.17.142 resolves to a PTR record to email.xpasc.com?
I'm running GB V3.6.1 ... if upgrading would fix this, then I'm willing
to upgrade.
Thanks,
Dave Morris
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