Re: slow dns lookup
David Clymer wrote:
> On Sun, 2005-09-11 at 02:08 -0400, Matt Price wrote:
>
>>gaash, latest in a barrage or problems related to movingm y computer
>>from work to home.
>>
>>at work, this computer was exposed directly to the internet; for DNS it
>>used the university dns servers
>>
>>Now it sits at home, and uses the cheap wireless router as the primary
>>DNS. DNS is MADDENINGLY slow, much much slower than it used to be at
>>work and also much slower than it is on the other machines on my network
>>(both running debian). Ther esolv.conf files on all 3 machines are the
>>same. So where should I look to try to figure out what the problem is??
>>
>
>
> It might be a problem with your ISP's DNS servers. My ISP has really
> crappy DNS. I use other DNS servers because my ISP doesnt resolve some
> hostnames, and is sometimes just _really_ slow to respond.
>
> try a dig on a given hostname using your ISP DNS, then using some other
> server. If the first one is slow and the second isnt. That's probably
> it.
>
> $ time dig @ns1.isp.com www.zettazebra.com
> $ time dig @ns1.foobar.com www.zettazebra.com
thanks david. Didn't know about dig OR time, that's nice. In fact this
turns out to be the problem -- the ISP's primary dns is rotten, andm y
cheap SMC router is a little stupid about DNS, I think. I still don't
understand why lookup was so much slower on this particular machine than
on others, but that's of no great consequence -- I've installed 4.2.2.2
as my primary dns server, and that works great. thanks!
matt
>
>
> -davidc
>
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