Hi Pete,
Thank you for the posting. As you indicated when you use nslookup, you
received server unknown error message.
In order to better understand this issue, please let me know the detailed
network configuration. How many nics in the server and what are you trying
to accomplish with DNS?
Regarding this issue, we are providing you with the following information
and suggestions:
Suggestion one:
------------------------
When Nslookup starts, it attempts to resolve the IP address of its host's
DNS server to its fully qualified domain name (FQDN). If the DNS server
does not respond or if the DNS server's reverse lookup zones do not contain
a PTR record for the DNS server's IP address, the error message is
displayed.
If the host is configured to point to itself for DNS name resolution,
verify that the DNS service is starting without error and that a PTR record
exists in the appropriate reverse lookup zone.
You can manually create the PTR record if your DNS server does not have
dynamic updates enabled. If dynamic updates are enabled, you can create the
PTR record by typing the following command at a command prompt:
ipconfig /registerdns
Suggestion two:
---------------------------
If you have no DNS server configured on your client, Nslookup will default
to the local loopback address. Other utilities may react similarly.
To resolve this issue, you need to configure a DNS server on your client by
performing the following steps:
1. Click the Start button, point to Settings, click Control Panel, and then
double-click the Network icon.
2. Click Protocols, click TCP/IP Protocol, and then click Properties.
3. Click DNS, click Add, and then type the IP address of your DNS server.
4. Click Add, click OK, and then click OK again.
Suggestion three:
--------------------------
There is a missing or mis-configured PTR record for your DNS server in your
reverse lookup zone. The DNS Manager does not automatically create a PTR
record for your DNS server, even though it may automatically create an "A"
record in your forward zone.
To resolve this problem, perform the following steps:
1. From DNS Manager, open your forward zone.
2. Right-click on the "A" record for your DNS server, and then click Delete
Record.
3. Click Yes to confirm the deletion of the "A" record.
4. Right-click on the forward zone, and then click New Host.
5. Type the host name of your DNS server and the IP address.
6. Select the Create Associated PTR Record check box.
7. Click Add Host, and then click Done.
Please let me know if the above information and suggestion helps and
answers your question. If anything is unclear, please let me know.
If the issue still persists, please let me know the detailed information on
your network configuration especially the DNS server.
Sincerely,
Cherry Qian
MCSE2000, MCSA2000, MCDBA2000
Microsoft Partner Online Support
Get Secure! -
www.microsoft.com/security
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