[Cialug] Inconsistent consistently long DNS lookup times

Colin Burnett cmlburnett at gmail.com
Mon Mar 8 14:14:19 CST 2010


On Mon, Mar 8, 2010 at 1:56 PM,  <bofh at visi.com> wrote:
>
> As for WinXP, IIRC it has a DNS cache.  Might want to
> clear that (via ipconfig?).

The laptop was absent of delays for any domain I could throw at it,
previously-used (read: cached) or not.  I will try a reboot and flush
just to make sure.


On Mon, Mar 8, 2010 at 1:45 PM, Matthew Steven <matthew at geniusweb.com> wrote:
> Colin, if you think it may be a problem on the wire, you may also
> install bind utils and run
>
> host -v destination.com ns1.another.net
>
> That will give you a more detailed feedback of what takes place on each
> lookup. The output should be fairly self explanatory.
>
> Matt

Good, thanks.  I'll be sure to run that in addition to tcpdump when I get home.


Colin


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