rDNS

[Alberto Colosi]

I manage delegated and not but ISP delegate (can do but is not forced to do it) only if you own at least the C subnet (all).


If you only own some IP from a C subnet as DNS ZONEs on reverse lookups handle an entire C subnet and can't be delegated only 3, 5, 10 IP from a subnet


so if you don't own a full C subnet or ISP don't want to delegate (if your DNS server will be unreachable could arm something on ISP) you only can try to ask the ISP to map names on their DNS , ISP DNS and even this not all ISP do or is done with default IN-ADDR-ARPA naming.



Alberto Colosi

ITC , NetWork & Security Architect & Admin


________________________________
From: bind-users <bind-users-bounces at lists.isc.org> on behalf of Reindl Harald <h.reindl at thelounge.net>
Sent: Friday, January 20, 2017 5:06 PM
To: bind-users at lists.isc.org
Subject: Re: rDNS



Am 20.01.2017 um 16:57 schrieb Ron Wingfield:
> I am having difficulty configuring reverse DNS.  This has been a problem
> for over a year between my server(s) and my ISP, AT&T.  Specifically, I
> cannot  eMail to any recipient that requires rDNS verification, e.g.,
> SBCglobal.net, Comcast.net, or AOL.  Very frustrating.
>
> In both cases, the reported server is an AT&T server ;; SERVER:
> 68.94.157.9#53
> . . .why shouldn't this "point" to my server, 162.202.233.81 and not AT&T's?

because the rDNS has *nothing* to do with your domain and mostly also
not with your DNS server (except you have a own subnet and it's
delegated by the ISP)

you are not the netowner - you must talk to your ISP
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