resolver doesn't see resolv.conf changes

Ulrich Spoerlein spoerlein at googlemail.com
Sun Apr 9 17:13:25 UTC 2006


Dmitry Pryanishnikov wrote:
> Hello!
> 
> On Sat, 8 Apr 2006, Ulrich Spoerlein wrote:
> >Good idea, but this defeates the hierarchical purpose of DNS. Now my
> >caching DNS is always querying the root DNS servers.
> 
>  Sorry, but what kind of hierarchy does it defeat? If client's query
> can't be satisfied from provider's DNS cache, and doesn't refer to
> domain which is hosted on ISP, then provider's DNS server will make
> first query to root DNS server, and then will walk down domain hierarchy
> (e.g. .ua -> .dp.ua -> atlantis.dp.ua). So setting client's DNS to directly
> query root servers defeats just the provider's DNS cache.

Exactly. Since I have the honour to use a dialup connection regularly,
I'd rather have a forwarding-only DNS server, since that will cut down
the number of DNS packets on the dialup-link tremendously.

The dhclient/named hacks are all very nice, but additionally I'll need
the same in ppp.linkup.

> >And there might be ISPs who disallow outgoing DNS connections to
> >somewhere else than their own DNS servers.
> 
>  Not us ;)

Lucky you, but I'd rather go the local route, since this should always
work and be faster (provided the "ISP"'s named is not overloaded)

Ulrich Spoerlein
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