reverse dns does not work

[Kevin Darcy]

bzhang at sohar.com wrote:

> When I did a nslookup, I got the same thing as you had: sohar.com.
>
> Our ISP is Concentric. The reverse dns has not been working for quite
> long time.  Before it was another kind of error: if I used our dns
> server then dns lookup worked fine, but if I pointed it to an outside
> server, it no longer worked.

> I called several times. Each time they said they were going to
> delegate the reverse dns to us, but every time it turned out they did
> nothing. Until last Monday, a guy finally did it for me. Today when I
> came back, I found this strange thing. I thought I did something wrong
> on our end. Now it turns out it was their fault.
>
> What kind of evidence should I give to them to nail their fault?

Evidence? They can look at their own zone file! Ask them what pointing CNAMEs
from an in-addr.arpa zone to a name which doesn't resolve to a PTR is
supposed to accomplish...


- Kevin

> On 23 Aug 2000 16:04:50 -0700, Kevin Darcy <kcd at daimlerchrysler.com>
> wrote:
>
> >
> >I tried a few reverse lookups in that address range, and all I got were
> >CNAMEs to the name "sohar.com", which doesn't resolve to any PTR's.
> >I think your provider is somewhat confused about how to implement
> >RFC 2317. Given what you have set up on your server, they should be
> >pointing those CNAMEs to names in the 64/26.83.112.216.in-addr.arpa zone.
> >
> >
> >- Kevin
> >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
> >
> >
> >
> >
> >
> >