Re: F23 System Wide Change: Default Local DNS Resolver

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On 06/01/2015 09:33 PM, Reindl Harald wrote:
> 
> 
> Am 01.06.2015 um 21:28 schrieb Andrew Lutomirski:
>> On Mon, Jun 1, 2015 at 12:25 PM, Ryan S. Brown <ryansb@xxxxxxxxxx> wrote:
>>> A local DNS resolver would certainly be a surprise to me. Again, this
>>> comes back to the expectation that a server isn't hopping networks or
>>> running somewhere un-trusted where there's a high risk of bad actors.
>>
>> It's not just bad actors.  Sometimes things break or you need to
>> reconfigure your upstream resolvers.  With a local caching resolver,
>> this Just Works (tm).  With the status quo, it requires restarting
>> everything
> 
> WHAT - the opposite is true,

Andrew is right, glibc caches the name server *settings*
(/etc/resolv.conf contents), but not the responses received.

The recommended workaround is to use nscd, but this has issues of its own.

-- 
Florian Weimer / Red Hat Product Security
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