DNS Server search order

[Dan Track]

On 1/5/07, Tim <ignored_mailbox at yahoo.com.au> wrote:
> On Fri, 2007-01-05 at 10:24 +0000, Dan Track wrote:
>
> > I've got a problem resolving some internal hosts. I've listed three
> > servers in my resolv.conf. The first two (ext1 ext2) are external and
> > the last is internal (int 1). With this setup I'm unable to resolve my
> > internal hosts.
> >
> > However if I rearrange the dns servers so I now have
> >
> > nameserver int1
> > nameserver ext1
> > nameserver ext2
> >
> > I can resolve the internal hosts easily.
> >
> > So my question is really why won't the hostnames get resolved if the
> > internal DNS server is last in the list to be queried ?
>
> The usual process is to query the first, wait for a response, then query
> the next if there's no response.  This will mean, at least, a
> significant delay for internet name resolution.  The time-out for the
> first two isn't always quick.
>
> What you're asking it to resolve might play a part in why you're not
> getting an answer.  If the external resolvers do provide some answer,
> but not the one that you want (such as reverse look-ups on 192.168.x.y
> addresses), that'd be the cause of your problems.
>
> You can dispense with the external resolvers, and use your internal one
> for all queries (internal and internet addresses).
>
HI

Thanks everybody for your help. I guess the crux of the matter then is
for me to put the internal DNS server first.

Thanks
Dan