Using forwarders

[dMN]

We are running a windows 2000 server with DNS. We have two
forwarders:
1 dns server from our internet provider
2 dns server from a other company where all our intranet
sites are located and cannot be find true the internet.
(we have a direct line to them)

Normally you make a zone and put all the hosts form the
intranet in it. But these ipaddresses change without
notice and there are honderds of addresses.
So our question is:
Is it possible if forwarder 1 gives answer: cannot find,
that our dns checkes the second forwarder and then does
find and gives back ip to the client

 

[Kevin D. Goodknecht Sr. [MVP]]

In

We are running a windows 2000 server with DNS. We have two
forwarders:
1 dns server from our internet provider
2 dns server from a other company where all our intranet
sites are located and cannot be find true the internet.
(we have a direct line to them)

Normally you make a zone and put all the hosts form the
intranet in it. But these ipaddresses change without
notice and there are honderds of addresses.
So our question is:
Is it possible if forwarder 1 gives answer: cannot find,
that our dns checkes the second forwarder and then does
find and gives back ip to the client

Forwarding does work that way, if the forwarder cannot find and answer
cannot find the query fails and resolution stops. If the forwarder does not
respond in a defined time, it times out and goes to the next forwarder, if
it answer either with success or fail, DNS moves it to the top of the
forwarders list. It the forwarder answers with a referral an event 7063 is
logged and DNS goes on to the next forwarder.
If all forwarders timeout, your DNS server will attempt to resolve the name
itself using recursion.

 

[dMN]

I thought also this way, but if i put the second forwarder
on top i can connect to all my intranet pages and if i put
the first forwarder on top i cannot.
The problem is my intranet is known in DNS2 but not in
DNS1, so if the request goes true DNS1 the dns wil respond
with cannot find ( the query is stopped). So the client
will get page cannot be displayed.

 

[Kevin D. Goodknecht Sr. [MVP]]

In

I thought also this way, but if i put the second forwarder
on top i can connect to all my intranet pages and if i put
the first forwarder on top i cannot.
The problem is my intranet is known in DNS2 but not in
DNS1, so if the request goes true DNS1 the dns wil respond
with cannot find ( the query is stopped). So the client
will get page cannot be displayed.

Intranet? Is this site hosted locally?
Are you behind NAT? (with private IPs)
What is the DNS IP from your ISP?
What is the domain name?
Is there an internal domain?
Is it the same as the public name?

All of these questions are very relevant and the answers make a difference
on what you can do or need to do.