2 NIC's and DNS not working Properly

  • Thread starter Thread starter Daniel Smith
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D

Daniel Smith

I have a windows 2000 server (SP4) as a member server on
my network. It has two network cards, one for internal
with a fixed IP and one for External which uses DHCP to my
ISP. On my internal network, i have given it a preferred
DNS server of 192.168.0.1 which is the IP of my internal
DNS which i can ping ok and works on all other machines.
I cant see my server via \\uncname and when i go and type
nslookup in the command prompt, it shows me the default
DNS server is the DNS server of my ISP, not my internal
server. How can i make my internal DNS server the default
for the Local area connection???
 
In
Daniel Smith said:
I have a windows 2000 server (SP4) as a member server on
my network. It has two network cards, one for internal
with a fixed IP and one for External which uses DHCP to my
ISP. On my internal network, i have given it a preferred
DNS server of 192.168.0.1 which is the IP of my internal
DNS which i can ping ok and works on all other machines.
I cant see my server via \\uncname and when i go and type
nslookup in the command prompt, it shows me the default
DNS server is the DNS server of my ISP, not my internal
server. How can i make my internal DNS server the default
for the Local area connection???
Click to expand...

You need to manually configure your internal DNS into the external NIC, you
should not use your ISP DNS, even on this NIC. You should only use you ISP
DNS as a forwarder in the DNS server properties on the Forwarder tab. Read:
300202 - HOW TO Configure DNS for Internet Access in Windows 2000
http://support.microsoft.com/default.aspx?scid=kb;en-us;300202&FR=1

Also since one of your NICs connects directly to your ISP you need to check
your bindings. Do that in Control panel, double click Network and Dial up
connections, then in the menu select Advanced, click Advanced Settings. Make
sure the internal NIC is at the top of the Binding order and that File
Sharing and Client for MS Networks is bound.
On the External NIC clear the check box for File Sharing and Client for MS
Networks

You should also make sure DNS is listening only on the internal IP on the
interfaces tab.


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Kevin D4 Dad Goodknecht Sr. [MVP]
Hope This Helps
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I would also like to add this, since you have a Multi homed machine.
292822 Name Resolution and Connectivity Issues on Windows 2000 Domain
Controller with Routing and Remote Access and DNS Installed.
Edit the registry:
1.. Start Registry Editor (Regedt32.exe).
2.. Locate and click the following key in the registry:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\DNS\Parameters

3.. On the Edit menu, click Add Value, and then add the following registry
value:
Value name: PublishAddresses
Data type: REG_SZ
Value data: IP address of the internal interface.( 192.168.0.1)If more
than one IP address needs to be specified, separate the addresses with
spaces.

For additional information, click the article number below to view the
article in the Microsoft Knowledge Base:
289735 Routing and Remote Access IP Addresses R

4.. Locate and click the following key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Netlogon\Parameters

5.. On the Edit menu, click Add Value, and then add the following registry
value:
Value name: RegisterDnsARecords
Data type: REG_DWORD
Range: 0 through 1, default value: 1. Change this value to 0.

6.. Plus open up your DNS MMC, Right click on the server name, properties,
then on the interface tab, put a radio but on the only the following IP
address. Only list the 192.168.0.1. Make sure the IPaddress box is blank.

7.. Then you will have to go into your forward lookup zone and remove all
"same as parent" list for the external IP address (ISP).

8.. Also change the binding order to internal, then external.



Tim Roberts (MSFT)
 
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