reverse dns does not work

[Kevin Darcy]

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