Help with reverse addressing

[Barry Margolin]

In article <a92d5d$a3u at pub3.rc.vix.com>,
Michael D. Kirkpatrick <wizard at psychodad.com> wrote:
>
>I am not sure if I set up my reverse lookups correctly or not.  I do
>not know how to test all aspects to verify that I did it correctly. 
>The only tool I know of is 'nslookup ip.ad.dd.ress'
>
>I have forward and reverse set for the following address:
>12.45.204.6  =  web1.ca-industries.com
>
>When I do an nslookup on either one, it looks ok to me.  The only
>problem is that now I am getting bounced messages from mail servers
>with weird errors like DNS failure, Invalid sender, etc...  I just
>started deligating my own reverse lookup addresses and the bounce
>E-Mail started flowing in.  Can anyone please look at my records and
>tell me if something is wrong?

It looks like you've set it up properly to me:

% dig -x 12.45.204.6 ptr

; <<>> DiG 8.3 <<>> -x ptr 
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 0
;; QUERY SECTION:
;;	6.204.45.12.in-addr.arpa, type = PTR, class = IN

;; ANSWER SECTION:
6.204.45.12.in-addr.arpa.  1d23h55m27s IN CNAME  6.0/26.204.45.12.in-addr.arpa.
6.0/26.204.45.12.in-addr.arpa.  1D IN PTR  web1.ca-industries.com.

;; AUTHORITY SECTION:
0/26.204.45.12.in-addr.arpa.  1D IN NS  ns2.ca-industries.com.
0/26.204.45.12.in-addr.arpa.  1D IN NS  ns1.ca-industries.com.

;; Total query time: 63 msec
;; FROM: tools.genuity.com to SERVER: default -- 4.2.2.1
;; WHEN: Wed Apr 10 18:52:05 2002
;; MSG SIZE  sent: 42  rcvd: 159

It would be a good idea to get your ISP to configure their servers as
slaves for your subdomain.  Otherwise, it's very easy to exceed the query
restart limit in BIND, resulting in spurious failures.

-- 
Barry Margolin, barmar at genuity.net
Genuity, Woburn, MA
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