[Netalyzr] DNS latency threshold

[Zhen Cao]

Thanks for the reply.

Another question followed: which DNS is under test?

I am configuring my DNS at 8.8.8.8 (google public dns), but the
analysis result indicates that "Your NAT has a built in DNS proxy. The
DNS request was received from 211.99.129.210". So the DNS performance
in done between my NAT box and the outside internet?

And when i am accessing the web, i checked that the DNS response is
actually received from the 8.8.8.8.

Thanks for the help.

On Sat, Jan 16, 2010 at 1:59 PM, Nicholas Weaver
<nweaver at icsi.berkeley.edu> wrote:
> 750.  And we set a threshold simply because we don't have gradiants: either it raises an alert or not, so we have to pick a number that is somewhat sensible.
>
>
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> On Jan 15, 2010, at 9:55 PM, Zhen Cao wrote:
>
>> Hi Netalyzr Contributors and All,
>>
>> I'd like to know what's DNS latency threshold in Netalyzr. In one
>> test, I got a DNS lookup latency of 770ms and it reported "Your ISP's
>> DNS server is slow to lookup names". In another test, I got 740ms and
>> did not see that warning. Did you set a threshold between 740ms and
>> 770ms and why?
>>
>> Thanks,
>> Zhen
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>
>