difference in nslookup

[Armin Safarians]

Quick one here.

In a split DNS environment that I run here, when I do an nslookup
yahoo.com, my internal DNS server forward the query to the external ones
and so on. Here once in a while this process fails to where snoop shows
the query go from the client to the internal dns and then onto the
external ones, the response however  coming back never gets to the
internal dns from the external ones. I get a Error 2(Server Failed)
message. This consistently only happens on one of the internal systems
and not the other one.

In troubleshooting here is what I have seen that is odd.

Internal>     nslookup hostname.mydomain.com		OK
Internl>	      nslookup yahoo.com			Fails.

Internal>  nslookup
Server externalhost.mydoamin.com

Yahoo.com			OK.

So, the question is, what is a difference between doing an nslookup
yahoo and letting the forwarders do  the forwarding, versus nslookup,
setting the server to the external servers and then looking up yahoo.
Hope this makes sense.


Thanks,
AMS :-)


*******
The great man in he who, in the midst of the crowd,
keeps with perfect sweetnedd the independence of solitude.
*******



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