reverse dns does not work

[Mr. James W. Laferriere]

	Hello All ,  Might try the below .  Hth ,  JimL

 root at filesrv1:~# dig @dns.sohar.com
100.64/26.83.112.216.in-addr.arpa. any any

; <<>> DiG 8.2 <<>> @dns.sohar.com 100.64/26.83.112.216.in-addr.arpa. any any 
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUERY SECTION:
;;      100.64/26.83.112.216.in-addr.arpa, type = ANY, class = ANY

;; ANSWER SECTION: 100.64/26.83.112.216.in-addr.arpa.  1D IN PTR  sohar54.sohar.com.

;; Total query time: 111 msec
;; FROM: filesrv1 to SERVER: dns.sohar.com  216.112.83.112
;; WHEN: Fri Sep  1 15:40:58 2000
;; MSG SIZE  sent: 51  rcvd: 82


On Fri, 1 Sep 2000, Kevin Darcy wrote:
> Well, you may be able to, but I *can't* reverse-resolve that address.
> Concentric reports that 100.83.112.216.in-addr.arpa is aliased to
> 100.64/26.83.112.216.in-addr.arpa, and that dns.sohar.com is authoritative
> for 64/26.83.112.216.in-addr.arpa, but when I ask dns.sohar.com about
> 100.64/26.83.112.216.in-addr.arpa, it doesn't seem to know anything about it
> -- it answers non-authoritatively with just the CNAME. It's as if it doesn't
> have a definition for the 64/26.83.112.216.in-addr.arpa zone...
> - Kevin
> bzhang at sohar.com wrote:
> > I found out why it did not work this time. The poblem is that: as
> > suggested by a person in this newsgroup who think I typed wrong in my
> > configuation file. She suggested me to use
> > 26/64.83.112.216.in-addr.arpa instead of
> > 64/26.83.112.216.in-addr.arpa.  Though it did not work, I forgot to
> > change it back. Now I change back and can reverse dns look up
> > 216.112.83.100.
> > But it seems that dns reverse lookup is still not working. Since I
> > still can not download some software that is only downloadable inside
> > US and I think they are using DNS reverse lookup for that purpose.
> > Thanks
> > Bing
> > On 29 Aug 2000 15:32:37 -0700, Kevin Darcy <kcd at daimlerchrysler.com>
> > wrote:
> > >Concentric's server reports that 100.83.112.216 is an alias for
> > >100.64/26.83.112.216.in-addr.arpa. Your server (?) dns.sohar.com,
> > >presumably the master (??) has been delegated
> > >64/26.83.112.216.in-addr.arpa, but when a PTR query for
> > >100.64/26.83.112.216.in-addr.arpa is sent to it, it returns SERVFAIL and
> > >so does the slave at Concentric. What's wrong with your server? Is it
> > >having trouble loading the zone? If the contents of the zonefile are the
> > >same as you show below, I don't see anything wrong offhand. But have you
> > >changed the contents in the meantime?
> > >- Kevin
> > >bzhang at sohar.com wrote:
> > >> After I talked with our ISP, Concentric and they made some
> > >> modification. But it seems to me something is still not working.
> > >> Before if I pointed to our own dns server, I can both forward and
> > >> reverse lookup sohar54.sohar.com whose IP address is 216.112.83.100.
> > >> Hoever if I pointed to concentric dns server, it can do forward lookup
> > >> on sohar54.sohar.com, but reverse look up on 216.112.83.100 fails.
> > >> But now even I pointed to our own dns server, I can no longer reverse
> > >> lookup 216.112.83.100. Forward looking up sohar54.sohar.com is ok
> > >> which returns 216.112.83.100.
> > >> Thanks
> > >> Bing
       +----------------------------------------------------------------+
       | James   W.   Laferriere | System  Techniques | Give me VMS     |
       | Network        Engineer | 25416      22nd So |  Give me Linux  |
       | babydr at baby-dragons.com | DesMoines WA 98198 |   only  on  AXP |
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