nslookup

[parker309]

I have a remote office that is having difficulty with nslookup. When I run nslookup I receive:

***Can't find servers name for address xxx.xxx.xxx.xxx: Non-existent domain.
***Default servers are not available
Default Server: UnKnown
Address: xxx.xxx.xxx.xxx

The IP address is correct, and I can even ping the server listed above by FQDN.

Why would nslookup reply with this error? Thanks in advance.

 

[brontosaurus]

you need to configure Reverse Lookup zones....

 

[ashpp]

Hi,

Either the DNS server isn't specified in the TCP/IP properties of the client or the Reverse Lookup Zone is correctly setup - you need to register a PTR record.

HTH

Ash.

 

[parker309]

This does make some sense. I check the DNS server and it has all the machines from both sites listed in the Forward lookups. For the Reverse lookups, there is only one zone, 192.168.100.x, which is site 1. There is no reference to the subnet of 192.168.200.x which is site2.

What am I doing wrong? Thanks for the help.

 

[dmanlam]

If I'm reading this all correctly, just set up a Reverse lookup zone for the second subnet: 192.168.200.x If you have DDNS set up, I believe the appropriate PTR records should get created. You may have to set this option somewhere, though. After creating the .200 reverse zone, do a Properties on one of your .200 machine A-records in the forward zone -- I think there's an option in there for "Update PTR record?". Normally, I think DDNS will just take care of this association/updating.
-Drew

 

[parker309]

Thanks for the reply.

Do I need to add this reverse zone to all my DNS servers? Will it replicate to the other secondary servers?

Thanks.

 

[dmanlam]

By the fact that you state "other secondary servers", I'm assuming you have DNS replication (zone transfers) set up. Just config on the master server and the information should replicate down to the secondary DNS servers. Are they not config'd as Active Directory Integrated for some reason? Just curious....

hope it works out!
Drew