Re: rDNS

[Ron Wingfield]

So if the DNS resolver used is "OK", then is there a problem with my code for the in-addr.arpa zone file?  . . .rDNS is not working. On 1/20/2017 10:19 AM, Bob Harold wrote: On Fri, Jan 20, 2017 at 10:57 AM, Ron Wingfield <ron.wingfi...@archaxis.net> wrote: 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. Two examples of dig: # dig -t mx alpha.archaxis.net ANSWER: 0, AUTHORITY: 1, Why does this first example, digging the FQDN of alpha.archaxis.net reports one authority but no answers? # dig -t mx archaxis.net ANSWER: 2, AUTHORITY: 0, . . .yet this second example. digging the FQDN of archaxis.net reports no authority but 2 answers? (The) ;; ANSWER SECTION: (of both examples) reports: archaxis.net.           10800   IN      MX      30 bravo.archaxis.net. archaxis.net.           10800   IN      MX      20 alpha.archaxis.net. 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? Just to clear up the confusion on this point: dig is telling you that "SERVER: 68.94.157.9#53" is the DNS resolver that your computer used to answer the DNS question.  That server is not part of the answer to the question.     I have coded my BIND 9 in-addr.arpa zone file as follows: $ORIGIN   233.202.162.in-addr.arpa. $TTL 3h @       IN   SOA      ns1.archaxis.net.  me.archaxis.net. (                           2017012002    ; Serial                                 1h      ; Refresh                                 1h      ; Retry                                 1h      ; Expire                                 1h )    ; Negative cashing TTL                 3600    IN   NS   ns1.archaxis.net.                 3600    IN   NS   ns2.archaxis.net. 80              3600    IN   PTR  network.archaxis.net. 81              3600    IN   PTR  alpha.archaxis.net. 82              3600    IN   PTR  bravo.archaxis.net. 87              3600    IN   PTR  broadcast.archaxis.net. What is wrong?  Is this my problem, or with AT&T? --  Bob Harold

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