DNS and forwarders

[Dale]

Just a setup question. I have a LAN behind a Linksys
router. The router has DHCP configured and the Server, a
WIN2k Domain Controller(AD integrated zone) has the root
deleted and the IP addresses of my ISP set to their IP
addresses.

1. My Server is setup to look for DNS requests to itself,
right?
2. My clients have DHCP enabled...do they recieve the
IP's of my ISP by first querying my DNS server?
3. Does this mean my DNS server passes this request onto
the ISP DNS servers, then returns the info and stores the
entry into AD Integrated zone for future requests?

Thanks,
Dale

 

[Herb Martin]

Just a setup question. I have a LAN behind a Linksys

router. The router has DHCP configured and the Server, a
WIN2k Domain Controller(AD integrated zone) has the root
deleted and the IP addresses of my ISP set to their IP
addresses.

1. My Server is setup to look for DNS requests to itself,
right?

Right -- especially important for DCs -- they are (internal)
DNS clients TOO.

2. My clients have DHCP enabled...do they recieve the
IP's of my ISP by first querying my DNS server?

They resolve ANYTHING external from your DNS server
which has to deal with external names/addresses for them.

3. Does this mean my DNS server passes this request onto
the ISP DNS servers, then returns the info and stores the
entry into AD Integrated zone for future requests?

That's a good way -- configure the the internal DNS server's
forwarder as your ISP's DNS.

If you had a bunch of DNS servers, you might have them
all ask the NAT/router/proxy/firewall so you would get a
consolidated cache (another choice.)

External requests
Client-->internal DNS-->forwarder (recurses the Inter) and
forwarder->internal->client (gets the resolution)

Internal requests
Client->internal DNS (answers)-->client with resolution

In the external case, the internal server might have it in cache
if you ask the same questions.

 

[Dale]

Thanks for the reply!!

So I shouldn't set the internal clients with the
DNS address of my internal server, just let DHCP do
everything?

Thanks,
Dale

 

[Oli Restorick [MVP]]

Letting DHCP do the work in configuring your PCs is always a good move. You
should ensure that DHCP is providing your clients with the correct DNS entry
(that of your internal DNS server).

Oli

 

[Dale]

It works!!!

I posted a new message called DNS solutions with the
problem and resolution!!! Sprint set this up and I think
they were just happy to get internet working.

Thanks for all the help!! Please read the topic DNS
Solution and make any comments!!

Once again, thanks!!
Dale