reverse dns does not work

[Kevin Darcy]

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
> >>
> >> On 23 Aug 2000 15:08:43 -0700, bzhang at sohar.com wrote:
> >>
> >> >I struggled with this for a long time. We got 64 IP addresses,
> >> >216.112.83.64-127,  from our ISP. I am using version 8.1.* bind on Red
> >> >Hat 6.2.
> >> >
> >> >Here is the named.conf
> >> >
> >> >options {
> >> >       directory "/var/named";
> >> >
> >> >};
> >> >
> >> >zone "sohar.com" {
> >> >       type master;
> >> >       file "db.sohar";
> >> >};
> >> >
> >> >zone "meadep.com" {
> >> >       type master;
> >> >       file "db.meadep";
> >> >};
> >> >
> >> >zone "64/26.83.112.216.in-addr.arpa" {
> >> >       type master;
> >> >       also-notify {
> >> >               206.173.119.72;
> >> >               207.155.183.72;
> >> >               207.155.183.73;
> >> >               207.155.184.72;
> >> >       };
> >> >       file "db.216.112.83.64-127";
> >> >};
> >> >zone "." {
> >> >       type hint;
> >> >       file "named.ca";
> >> >};
> >> >zone "0.0.127.in-addr.arpa" {
> >> >       type master;
> >> >       file "named.local";
> >> >};
> >> >
> >> >Here is db.sohar
> >> >
> >> >$TTL 86400
> >> >@      IN      SOA     dns.sohar.com.  bzhang.sohar.com. (
> >> >       2000081614      ; Serial (yyyymmddhh)
> >> >             86400             ; Refresh (after 1 day)
> >> >             900               ; Retry (after 15 minutes)
> >> >             1209600           ; Expire (after 14 days)
> >> >             345600            ; Minimum (TTL of 4 days)
> >> >                               )
> >> >       IN      NS      dns.sohar.com.
> >> >       IN      MX      10      mail.sohar.com.
> >> >       IN      MX      20      custmail.concentric.net.
> >> >       IN      A       216.112.83.112
> >> >sohar58        IN      A       216.112.83.112
> >> >dns    IN      CNAME   sohar58
> >> >..............
> >> >
> >> >
> >> >Here is the file db.216.112.83.64-127
> >> >
> >> >$TTL 86400
> >> >@      in      soa     dns.sohar.com.  bzhang.sohar.com. (
> >> >               2000071919      ; Serial (yyyymmddhh)
> >> >                     86400             ; Refresh (after 1 day)
> >> >                     900               ; Retry (after 15 minutes)
> >> >                     1209600           ; Expire (after 14 days)
> >> >                     259200            ; Minimum (TTL of 3 days)
> >> >                               )
> >> >                       in      ns      dns.sohar.com.
> >> >                       in      ns      nameserver3.concentric.net.
> >> >112                            ptr     sohar58.sohar.com.
> >> >.........
> >> >
> >> >
> >> >Here is the db.meadep
> >> >
> >> >$TTL 86400
> >> >@      IN      SOA     meadep.com.     bzhang.sohar.com. (
> >> >       2000081614      ; Serial (yyyymmddhh)
> >> >              86400            ; Refresh (after 1 day)
> >> >              900              ; Retry (after 15 minutes)
> >> >              1209600          ; Expire (after 14 days)
> >> >              345600           ; Minimum (TTL of 4 days)
> >> >                               )
> >> >       IN      NS      dns.sohar.com.
> >> >       IN      MX      10      mail.sohar.com.
> >> >       IN      MX      20      custmail.concentric.net.
> >> >       IN      A       216.112.83.112
> >> >www    IN      A       216.112.83.111
> >> >
> >> >
> >> >
> >> >
> >
> >
> >
> >
> >
> >