Recursive query fails

  • Thread starter Thread starter kelly Dawson
  • Start date Start date
K

kelly Dawson

Why would a recursive query fail on one DNS, but not on
another that is configured identically and on the same
network?
 
Is recursion disable on the Advanced tab of the DNS
server properties? NO
Does it still have a Root "." Forward Lookup Zone? NO
Do you have a forwarder defined on the Forwaders tab? YES
Are all the Root Servers resolved on the Root Hints tab?
YES
 
kD> Why would a recursive query fail on one DNS [server],
kD> but not on another that is configured identically
kD> and on the same network?

Possibilities:

* Your posited scenario doesn't match your actual situation because the
configuration is _not_ identical.
* Your posited scenario doesn't match your actual situation because the
servers are _not_ on the same network.
* Your definition of "fail" extends to include results that are, in fact,
quite correct.
* The hole that has been knocked into the firewall is the wrong shape and only
accounts for one of the two resolving proxy DNS servers.
* Recursion is not actually involved at all and there is a database
replication problem of some sort.
* NAT is involved, and the resolving proxy DNS servers are not in fact issuing
their back-end queries from publically reachable IP addresses.
 
In
Kelly Dawson said:
Is recursion disable on the Advanced tab of the DNS
server properties? NO
Does it still have a Root "." Forward Lookup Zone? NO
Do you have a forwarder defined on the Forwaders tab? YES
Are all the Root Servers resolved on the Root Hints tab?
YES
Click to expand...

Usually it just works provided the above is true.

Does nslookup work from both machines?


--
Regards,
Ace

Please direct all replies to the newsgroup so all can benefit.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory
 
I came across the exact same problem, it seems to me (from my
experience and from reading the posts in this newsgroup) that for some
reason, DNS in Win2k fails randomly, i.e. it stops performing
recursive queries for no reason at all.

The solution that worked for me was to simply disable forwarders, then
re-enable it and manually re-add the servers you wish to use as
forwarders.

I did that and it works fine: although I have no idea how long it will
last before failing again (if it does that is, as this was the first
time for it to fail)!

I hope this is of some use to those who are as frustrated as I was
trying to reason the cause/solution to this problem.

It would be helpful, though, if someone could provide a reasonable
explanation for this phenomenon??
 
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