[clue-tech] DNS

[Will]

You can buy me a beer when we celebrate Friday afternoon.

On Thu, Nov 18, 2010 at 3:05 PM, David L. Willson <DLWillson at thegeek.nu>wrote:

> Wow Will, you are tenacious.
>
> God bless men that are willing to use the Source.
>
> "Tenacious W" doesn't have the same ring as "Tenacious D".
>
>
> David L. Willson
> Trainer, Engineer, Enthusiast
> MCT MCSE Network+ A+ Linux+ LPIC-1 NovellCLA UbuntuCP
> tel://720.333.LANS
> Freedom is better when you earn it. Learn Linux. Get Free.
>
>
> ----- "Will" <will.sterling at gmail.com> wrote:
> > A Linux box will wait 5 seconds and then move on to the next server.
>
> >
> http://linux.die.net/man/5/resolver
> "timeout:*n*
> sets the amount of time the resolver will wait for a response from a remote
> name server before retrying the query via a different name server. Measured
> in seconds, the default is RES_TIMEOUT (see *<resolv.h<http://linux.die.net/include/resolv.h>>
> )."*
>  <http://linux.die.net/man/5/resolver>
> http://linux.die.net/include/resolv.h
> <http://linux.die.net/include/resolv.h>"# define RES_TIMEOUT 5 /* min.
> seconds between retries */"
> >
> >
> > On Thu, Nov 18, 2010 at 2:49 PM, Will <will.sterling at gmail.com> wrote:
> >
>>
>> Microsoft Technet says that a Windows DNS server will wait three seconds
>> for a DNS server to respond during a recursive lookup before moving on to
>> the next server for the domain.  I suspect BIND is similar but I do not see
>> mention of it in the documentation.
>>
>> >
>> On the client side a Windows machine will give it's preferred DNS server
>> two seconds to respond before moving on to the next DNS server in its list.
>>  Again I could not find anything on the BIND light weight resolver.
>> >
>> >
>> >
>> > On Thu, Nov 18, 2010 at 1:26 PM, Roy <rjohnston at denverinternet.com>wrote:
>> >
>>>
>>> dns will round robin through the servers- so on a no response it may
>>> retry but if it does get a response but bad data - it will cache that and
>>> stop.
>>> > which is why all authoritative NS need to be up to date and synced.
>>> >
>>>
>>> >
>>> >
>>> > Chris Ernst <penguin-guy at comcast.net> wrote:
>>> >
>>> > >It's up to the client.  Typically, if the initial request fails and
>>> > >there is another NS record, it will just try the next one.
>>> > >
>>> > >       - Chris
>>> > >
>>> > >On 11/18/2010 12:56 PM, David L. Willson wrote:
>>> > >> If a domain has a couple NS records setup at the registrar, what
>>> happens
>>> > >> if one of name-servers is down? Do lookups fail back to the client
>>> or
>>> > >> fail gracefully to the other NS with no notice to the client?
>>> > >>
>>> > >> What if there are more than two name-servers? Are they all tried
>>> before
>>> > >> a failure is reported, or just a certain number?
>>> > >>
>>> > >> What if the name-server is up, but there's another sort of failure,
>>> like
>>> > >> "no such domain" or something like that?
>>> > >>
>>> > >> I am willing and able to look this up myself, or trace it out
>>> myself,
>>> > >> but I'm short of time, so I thought I'd check if someone knew off
>>> the
>>> > >> top of their head, and wanted to show off a bit.
>>> > >>
>>> > >> David L. Willson
>>> > >> Trainer, Engineer, Enthusiast
>>> > >> MCT MCSE Network+ A+ Linux+ LPIC-1 NovellCLA UbuntuCP
>>> > >> tel://720.333.LANS
>>> > >> Freeing the world from the tyranny (or whatevery) of Microsofty-ness
>>> > >>
>>> > >>
>>> > >>
>>> > >> _______________________________________________
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>>> > >
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>>>
>>
>> >
>>
>
> >
>
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