Reverse Lookup Zone not responding

[Joe]

I have a Win2K DNS server as my authoritative DNS server. I am trying to
setup a reverse lookup zone for a classless IP range that responds to outside
queries. I have setup a zone using the following information:
subnet = 28
subnet mask = 29
IP address 192.168.100.225

So my new zone looks like this:
28-29.100.168.192.in-addr.arpa

I then add the appropriate PTR record to the zone and replicate it to my
secondary DNS server.

The problem is that when I do a query for a PTR record for the host
'server.domain.com', I get the response that no PTR record exists. The
response is coming from the correct name server. I have no idea what the
problem is. I've tried variations in the zone name (28_29.100.168.192) with
no luck.

Can anyone tell me what I'm dong wrong?
Thanks,
Joe

[Alan Sandal]

You've misunderstood how the zone files are created and what namespace
they're authoritative for.

Your zone needs to be 100.168.192.in-addr.arpa. Its not aware of the network
mask you're using and will become authoritative for the whole 192.168.100
range.

Once you've created it you'll need some records in it. Make sure you've got
one or more PTR record either created or dynamicaly registered with it and
ensure you can perform a lookup using NSLOOKUP <IP ADDRESS>. Once you're
sure its working go for the replication and re-check against the secondary
server.

Good luck.

Alan
"Joe" <J...@discussions.microsoft.com> wrote in message
news:6A066EF6-5BE0-48D9...@microsoft.com...

[Joe]

Alan,
Thanks for the reply. I tried your more direct approach with no luck.
Please note that I masked my real IP address range for purposes of posting.
The real address is a subnetted class C. I've been approaching this problem
as if I had reverse DNS delegation authority (which I do not for this
particular subnet.) But I'm not doing a rDNS query, simply querying for a
PTR record. So I'm confused as to where the problem lies. Is it in the zone
file, the reverse delegation authority, or something else.

Thanks,
Joe

[Joe]

Hmm. Someone else's reply seems to have disappeared. But she was correct.
I checked the folders from OWA and the content was there! Any clue as to why?

Thanks,
Joe

[Joe]

Please ignore the previous post. Wrong forum/thread. Just a bit confused
today. :)
Joe

[Alan Sandal]

Hi Joe,
How are you doing the query?
Can you see the PTR record using DNS admin tools?

Regards

Alan

"Joe" <J...@discussions.microsoft.com> wrote in message

news:B5743EF2-9A74-4EE2...@microsoft.com...

[Joe]

Allen,
I can see the record in DNS manager, and in the .dns file. I've tried
querying for the PTR record both in command line nslookup and via
dnstools.com. Both approaches result in no records returned.

[Alan Sandal]

Joe,
What are you typing to query for the record?

Regards

ALAN

"Joe" <J...@discussions.microsoft.com> wrote in message

news:5E9544F7-53C3-40B1...@microsoft.com...

[Joe]

Alan,
For the CLI, I'm doing the following:

server 192.168.41.211
set type=ptr
server.domain.com

I get the following results for the domain only:

domain.com

primary name server = ns1.domain.com
responsible mail addr = hostm...@domain.com
serial = 68
refresh = 900 (15 mins)
retry = 600 (10 mins)
expire = 86400 (1 day)
default TTL = 3600 (1 hour)

[Alan Sandal]

Hi Joe,
Just got back from a few days away from work...

You're trying to look up a PTR record by giving a hostname but the PTR
record relates to an IP address because reverse lookup zones are the oposite
to forward lookup zones. Its like trying to find a phone number in a phone
book by searching the phone book alphabeticaly and failing to find a person
'name' of 009180238409.

If you query for an IP address the server will work out what you wanted e.g.
nslookup 192.168.41.111

If you realy want to be specific go for:
> server 192.168.41.211
> set type=ptr
192.168.41.111 //where this IP is the address of server.domain.com that you
want to check for a PTR record for

Hopefuly you'll find your DNS setup is already working.

Regards

Alan

"Joe" <J...@discussions.microsoft.com> wrote in message

news:CAE1383D-1F93-4391...@microsoft.com...

[Joe]

Alan,
Hope your days off were relaxing.

I understand your logic here, but if I do a CLI query with nslookup, set
type=ptr and enter an IP address, I get the response: non-existent domain.

Your example below is basically a reverse DNS lookup, which my understanding
is different than querying for a PTR record. What I thought I've been doing
is asking DNS if a PTR record exists for a specific host. I've been doing
this to confirm that my reverse lookup zone is configured correctly before my
reverse delegation authority is setup.

So I'm still confused as to what I'm missing and/or doing wrong. Your
thoughts are appreciated.