Problem with Reverse DNS Lookup

[Nishal Goburdhan]

hmm...
firstly - aladdin is a NS - NS should not be CNAMEs!

ns1:/var/named> dig ns 92.140.in-addr.arpa. @f.root-servers.net
<snip>
;; ANSWER SECTION:
92.140.in-addr.arpa.    6D IN NS        ALADDIN.III.ORG.TW.
<snip>

which i'm assuming is correct.  (you should really get an additional nameserver for
this.)

but then aladdin passes SOA to another machine called iiidns (140.92.66.45)

ns1:/var/named> dig soa 92.140.in-addr.arpa. @aladdin.iii.org.tw
<snip>
;; ANSWER SECTION:
92.140.in-addr.arpa.    1D IN SOA       iiidns.iii.org.tw.  root.iiidns.iii.org.tw. (
                                        2000062909      ; serial
                                        4H              ; refresh
                                        2H              ; retry
                                        4w2d            ; expiry
                                        1D )            ; minimum
<snip>

and it seems that this machine doesn't know about the reverse entries for your network.

ns1:/var/named> dig soa 88.92.140.in-addr.arpa. @iiidns.iii.org.tw.
; <<>> DiG 8.2 <<>> soa 88.92.140.in-addr.arpa. @iiidns.iii.org.tw. 
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
										^^^

get the reverse for your in-addr.arpa delegated to your NS.



On Tue, Aug 08, 2000 at 04:32:06PM -0700, Lily Lee wrote:
> Thank you so much for the fast reply.  here is our situation:
> 
> Recently we set up a secondary DNS.  We ran into a problem with reverse
> lookup.  Currently, when we type nslookup from machines outside our domain,
> (i.e. any machine outside our company), the reverse lookup (IP to Domain
> Name) doesn't work, but Domain Name to IP works.
> 
> Before we set up the new secondary DNS, the original server name was
>                           aladdin.iii.org.tw
>                           IP address: 140.92.1.50
> 
> Now the new name server is
>                           svr2.iii.org.tw
>                           IP address: 140.92.88.46
> 
> We also put svr2.iii.org.tw as a Cname for aladdin.iii.org.tw
> 
> When we are searching aladdin.iii.org.tw, the following result shows:
> 
> Non-authoritative answer:
> aladdin.iii.org.tw      canonical name = svr2.iii.org.tw
> svr2.iii.org.tw nameserver = svr2.iii.org.tw
> 
> Authoritative answers can be found from:
> svr2.iii.org.tw internet address = 140.92.88.46
> 
> But when we are asking for 140.92.88.46,
> the following message pops up:
> 
> dns.hinet.net can't find 140.92.88.46: Non-existent host/domain
> 
> In order to solve our problem, do we need to register svr2.iii.org.tw with
> networksolutions? or ask ARIN to update our IP address record?
> 
> Your assistance is greatly appreciated.
> 
> Thank you in advance.

-- 
nishal goburdhan (ngc64)                the internet solution
tel: +27-86-050-5000                    fax: +27-11-283-5401
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