DNS forwarder question

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Nick

If I make a forwarder for a specific domain to another DNS server, will
that DNS server use its own forwarders if it can't resolve the DNS
request to that domain?

To make the question more clear:
A client makes a DNS request for domain test.net to DNS server A,
Server A has set up a forward for domain test.net to DNS server B.
If server B cannot resolve the DNS request, will it use its own
forwarders or will it just answer the client that the domain is not
reachable?
 
In
Nick said:
If I make a forwarder for a specific domain to another DNS server,
will that DNS server use its own forwarders if it can't resolve the
DNS request to that domain?

To make the question more clear:
A client makes a DNS request for domain test.net to DNS server A,
Server A has set up a forward for domain test.net to DNS server B.
If server B cannot resolve the DNS request, will it use its own
forwarders or will it just answer the client that the domain is not
reachable?
Click to expand...

Yes, the forwardee will become the forwarder if it doesn't have the answer,
provided forwarding is configured on it, otherwise it will use the Roots.

--
Ace

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posts it back to the original forum.

Ace Fekay, MCSE 2003 & 2000, MCSA 2003 & 2000, MCSE+I, MCT, MVP
Microsoft Windows MVP - Windows Server - Directory Services
Microsot Certified Trainer
Infinite Diversities in Infinite Combinations.
=================================
 
Nick said:
If I make a forwarder for a specific domain to another DNS server,
will that DNS server use its own forwarders if it can't resolve the
DNS request to that domain?

To make the question more clear:
A client makes a DNS request for domain test.net to DNS server A,
Server A has set up a forward for domain test.net to DNS server B.
If server B cannot resolve the DNS request, will it use its own
forwarders or will it just answer the client that the domain is not
reachable?
Click to expand...

It will not answer domain not found until it does a recursive lookup on the
name, meaning it start at the root to find the name. If it contacts the root
servers and does not find the name then it answer NXDOMAIN (Domain not
found) All DNS servers use this process unless recursion is disabled or
turned off.
 
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