Le Lundi 16 Juin 2003 23:00, Jeff Newmiller a écrit :
> On Mon, 16 Jun 2003, Jacques Nilo wrote:
> > Le Lundi 16 Juin 2003 21:37, M  Lu a écrit :
> > > By default, Bering is using dnscache and so /etc/resolv.conf has
> > > 192.168.1.254. Seems to me that ISP's DNSes are not used at all if you
> > > do not change settings in dnscache. dnscache still works because it
> > > uses root DNSes. Correct me if I am wrong.
> >
> > You are right. By default Bering does not use the ISP DNSes since it is
> > using - even at the router level - it's own dns resolver that is
> > dnscache. That is why you have the nodns statement in the pump conf file.
> > If you remove it you should get your ISP DNSes in your resolv.conf
> > But why should you ?
>
> Now that is a question I have puzzled over in the negative... why
> _shouldn't_ you? I know it is inconvenient to release a disk image that
> has to be configured to start at a nearby upstream cache, but isn't that
> more friendly to the root servers?  True, you are reducing the pounding on
> them by caching your _own_ repeat queries, but if all of us masqueraders
> uses our own copies of dnscache then we haven't improved the overloading
> situation for the root servers. Why bother them if the answer is nearby?
> Perhaps this reconfiguration should be an option in the documentation.
>
Well this is I guess the paranoid idea behind using dnscache: if you start 
from the root servers you do not have the risk of using your ISP DNSes which 
might have been corrupted :-)
But you are right this could be explained more clearly in the doc.
Basically you remove the nodns in pump and set FORWARDONLY to YES in dnscache
http://leaf.sourceforge.net/devel/jnilo/dnscache3.html#AEN113
(There is some info in the doc if you dig in :-) )
Cheers
Jacques


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