slow nslookup for external domains

[Barry Margolin]

In article <eat7cr$kcr$1 at sf1.isc.org>, tom at hottestnet.com wrote:

> I have a problem for DNS query. If I used my own DNS erver, it took
> long time (4.8) to get the result:
> 
> bash-2.05# /bin/time nslookup 203.202.1.1
> Server:  test.mydoamin.com
> Address:  192.168.3.2
> *** test.mydoammin.com can't find 203.202.1.1: Non-existent host/domain
> 
> real        4.8
> user        0.0
> sys         0.0
> 
> But if I use external DNS server, and do the samething, it's faster:
> bash-2.05# /bin/time nslookup 203.202.1.1
> Server:  vnsc-bak.sys.gtei.net
> Address:  4.2.2.2
> 
> *** vnsc-bak.sys.gtei.net can't find 203.202.1.1: Non-existent
> host/domain
> 
> real        0.0
> user        0.0
> sys         0.0
> 
> My DNS server version is 8.3.3:
> 
> bash-2.05# /usr/sbin/in.named -v
> in.named BIND 8.3.3 Wed Feb 18 23:46:02 PST 2004
>         Generic Patch-5.9-May 2002
> 
> 
> Any idea, why? Thanks.

The external server may have already had the answer cached.

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
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