Reverse DNS question

[Allen K. Smith]

192.100.1 is owned by the following. Have they delegated DNS to you for 
reverse lookups?

inetnum:      192.100.1.0 - 192.100.1.255
netname:      CCWR
descr:        Computing Centre for Water Research
descr:        Private Bag X01
descr:        Scottsville, 3209
country:      ZA
admin-c:      AK115-AFRINIC
tech-c:       AK115-AFRINIC
status:       ASSIGNED PI
mnt-by:       TF-192-100-1-MNT
mnt-lower:    TF-192-100-1-MNT
changed:      hostmaster at arin.net 19910308
changed:      hostmaster at arin.net 19980803
changed:      hostmaster at afrinic.net 20050221
source:       AFRINIC

person:       Arne F. Kure
address:      Computing Centre for Water Research
address:      Private Bag X01
address:      Scottsville
address:      3201
address:      ZA
phone:        +27 331 260 5175
e-mail:       kure at aqua.ccwr.ac.za
nic-hdl:      AK115-AFRINIC
changed:      hostmaster at arin.net 19960131
changed:      hostmaster at afrinic.net 20050221
source:       AFRINIC

If you just put 192.100.1 as a placeholder below, then I would still look at 
whether the DNS for your IPs has been delegated to the right name server.

Try something like:

dig +trace 2.1.100.192.in-addr.arpa

and see where it stops or fails.

Good luck,
-Allen

On Wednesday 08 February 2006 12:41, Bob Smith wrote:
> Hey Gurus,
>
> I'm running RH9, and have not had much problem with setting up DNS, with
> one exception:  getting the reverse DNS lookup to work properly from
> outside of the box.  I have forward and reverse dns zone files, but
> I think I'm missing something.  Both are listed in the named.conf file,
> but when I use some of the web tools, or do a reverse lookup, it can't find
> the domain.  Also, some mail servers are now looking for a domain tag
> in place of the in-addra.arpa basic declaration.
>
> Any help would be appreciated.
>
> Thanks,
>
> -Bob
>
> Entry in named.conf:
> zone "domain.com" {
>         type master;
>         file "domain.com.zone";
> };
>
> zone "1.100.192.in-addr.arpa" {
>         type master;
>         file "1.100.192.in-addr.arpa.zone";
> };
>
> Here's a sample of the forward zone file (domain.com.zone)
> ------------------
> $TTL 86400
> domain.com.     IN      SOA     machine.domain.com.
> webmaster.machine.domain.com (
>                         2006010902 ; serial number
>                         28800 ; refresh interval
>                         7200 ; retry interval
>                         604800 ; expire
>                         86400 ; time to live
>                         )
>
> ;
> ; Name servers
> ;
> domain.com.		IN	NS	machine.domain.com.
> domain.com.		IN	A	192.100.1.2
> machine.domain.com.	IN	A	192.100.1.2
> ns1.domain.com.		IN	CNAME	machine.domain.com.
> domain.com.		IN	MX	10	machine.domain.com.
> ; EOF
>
> And here's the 1.100.192.in-addr.arpa.zone file
> $TTL 86400
> @       IN      SOA     ns1.domain.com. webmaster.machine.domain.com (
>                         2006012102 ; serial number
>                         28800 ; refresh interval
>                         7200 ; retry interval
>                         604800 ; expire
>                         86400 ; time to live
>                         )
>
> @       IN      NS      ns1.domain.com
> 2       IN      PTR     domain.com.
> ; EOF