named[353]: sysquery: no addrs found for root NS ..........
Ion-Mihai Tetcu
itetcu at apropo.ro
Tue Sep 7 04:49:23 PDT 2004
On Tue, 7 Sep 2004 14:24:37 +0300
"Toomas Aas" <toomas.aas at raad.tartu.ee> wrote:
> Hi!
>
> > >From time to time I get this:
> >
> > Sep 7 12:57:44 it named[353]: sysquery: no addrs found for root NS (d.root-servers.net)
> > Sep 7 12:57:44 it named[353]: sysquery: no addrs found for root NS (a.root-servers.net)
> > Sep 7 12:57:44 it named[353]: sysquery: no addrs found for root NS (c.root-servers.net)
> > Sep 7 12:57:45 it named[353]: sysquery: no addrs found for root NS (h.root-servers.net)
> > Sep 7 12:57:45 it named[353]: sysquery: no addrs found for root NS (f.root-servers.net)
> > Sep 7 12:57:45 it named[353]: sysquery: no addrs found for root NS (b.root-servers.net)
> >
>
> This problem plagued me for a long time on several FreeBSD 4 servers
> running BIND 8 from the base system. Google finds numerous discussions
> on this problem in various lists/newsgroups but a solution is rarely
> offered.
>
> Finally, I found someone's theory in a NetBSD (or was it OpenBSD)
> forum. I can't tell whether it is true or not, but it makes sense
> to me.
>
> If your BIND is configured to use a forwarder and this forwarder is
> really good then BIND (almost) never needs to contact the root servers.
> The root zone times out in memory and it is not reloaded from disk. It
> is only loaded when BIND is started. Thus, if your BIND finally needs
> to contact a root name server after a long time of getting all
> responses from forwarder, it turns out that the data for root zone is
> not available...
>
> Now, as I said, I cannot tell whether this theory is true or not. What
> I can say is that on all 4 machines where I run BIND I configured
> one of two workarounds:
> - use "forward only" so you *never* need to check the root zone
> - do not use forwarders at all so you check the root zone fairly
> frequently.
It makes some sense; I have a forwarder on the LAN router that doesn't
do much besides routing and dns caching.
Thanks.
--
IOnut
Unregistered ;) FreeBSD "user"
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