DNS Configuration Help

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dizzyh

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Apr 11, 2013
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Hi All,
I have a VPN router with the configuration as follows: On the WAN side, I configured the VPN router with the static address, Subnet, Gateway and DNS of my ISP. On the LAN side I have DHCP and DNS disabled. Routers address is at default 192.168.1.1.

I am running Windows Server 2003 with Active Directory, DHCP and DNS installed. The configuration for the Server is a static address of 192.168.1.8, subnet 255.255.255.0, Gateway of 192.168.1.1 and DNS of 192.168.1.8. My question is, how should the DNS be properly configured on the server? Should it point to itself? Should the DNS be pointed to my router or ISP DNS?

The client machines are in the domain configured with DHCP but the internet is very slow. If I manually assign the client DNS as 192.168.1.1 which is the router, the internet is almost instant.
 
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If your network is set up as a domain, then your server will be running DNS and it should be the primary DNS server for every computer on your networks, including the server itself. Make sure your forwarding is configured correctly - your server's DNS configuration should be set up with your ISP's DNS servers on its forwarding tab in DNS Manager. You can also add extra server addresses, such as Google's, in case your ISP's servers are ever offline.

If your server is configured properly, it will handle all DNS requests to your local network resources and forward all other requests to the addresses listed on the forwarding tab, starting at the top. If your machines are slow to resolve DNS when browsing the web, I would verify that the...
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DerekVGH

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Jul 23, 2013
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If your network is set up as a domain, then your server will be running DNS and it should be the primary DNS server for every computer on your networks, including the server itself. Make sure your forwarding is configured correctly - your server's DNS configuration should be set up with your ISP's DNS servers on its forwarding tab in DNS Manager. You can also add extra server addresses, such as Google's, in case your ISP's servers are ever offline.

If your server is configured properly, it will handle all DNS requests to your local network resources and forward all other requests to the addresses listed on the forwarding tab, starting at the top. If your machines are slow to resolve DNS when browsing the web, I would verify that the forward addresses are correct and that the response speed is not unduly slow.
 
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dizzyh

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Apr 11, 2013
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Derek, Thanks you for your response. Can the forwarding address on my server be set to my router local IP which is 192.168.1.1, since the router already have the ISP DNS entered on the WAN side?
 
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DerekVGH

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Jul 23, 2013
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I have not tried that, but I see no reason why it shouldn't work. I'm not sure why you'd want to do that, though, as it could introduce a slight delay (adding another device to the forward chain), and in my opinion it's better to manage all your DNS settings in one place.
 
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