:: Re: [DNG] how to clear DNS cache
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Autor: Hendrik Boom
Data:  
Para: dng
Assunto: Re: [DNG] how to clear DNS cache
On Tue, Jan 03, 2017 at 08:55:40PM +0000, Simon Hobson wrote:
> Steve Litt <slitt@???> wrote:
>
> > What's wrong with 8.8.8.8? It's Google's public DNS, and for me, it
> > always works.
>
> That's fine - no-one is saying that you shouldn't use them if **you** want to.
>
> What people object to is a hidden change, where something that
> **should** work one way (DNS lookups fail if no working servers are
> configured) has been changed invisibly (falls back to using something
> that some people may have objections to using). If you are happy using
> Google's servers, then put them in resolv.conf (or whatever it's been
> re-invented into this week) - problem solved.


Don't several system comopnents, such as dhcp clients, happily rewrite
resolve.conf, wiping out anything the sysadmin may have set up.

-- hendrik

>
> For the rest of us, if we have no DNS servers in resolv.conf then we expect the system to respect that and not do DNS resolution. That is the **ONLY** correct behaviour.
>
> What is absolutely, 100%, not acceptable behaviour is what's been done - to silently do something that no sane admin would expect, and many people have objections to doing. Even worse is when there isn't a mechanism for turning this off.
>
> Comparison with (for example) NTP defaulting to using pool.ntp.org by default are disingenuous. For that, the settings are there in ntp.conf where they can be seen and easily changed. So that is completely different.
>
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