BIND 9 Problem - DNS Forwarding

[Kh Linux]

Dear Paul:

Thank you very much for your reply.

Could you please or someone in the list advise me further? Could it be that,
the forwarding take up a lot of bandwidth to my ISP?

Or could it be the problem with Squid? I simply installed the Squid RPM that
comes with the RedHat 9 CDs. I don't know how to fine-tune Squid
performance, perhaps you could give some advice or point me to a good Web
site on it.

Thanks,
Vidol

----- Original Message -----
From: "Paul Howarth" <paul at city-fan.org>
To: "For users of Fedora Core releases" <fedora-list at redhat.com>
Sent: Friday, October 29, 2004 4:00 PM
Subject: Re: BIND 9 Problem - DNS Forwarding


> Kh Linux wrote:
> > Dear all:
> >
> > I had been running both BIND 8 and Squid under SuSe 6.2 until recently
when
> > I switched to RedHat 9 with BIND 9 and Squid from the 3 CDs.
> >
> > Both in the old SuSe and new RedHat 9 now, I configure BIND to use
> > forwarding by adding to /etc/named.conf this:
> >
> >          forwarders {
> >                 N.N.N.N; // The IP of ISP DNS Server
> >         };
> >         forward only;
> >
> >
> > Now, BIND 9 always prints these errors below into /var/log/messages:
> >
> > ---
> > Oct 29 11:09:37 nslinux named[2787]: client 192.168.1.154#1264: updating
> > zone 'my.office.org/IN': update failed: 'RRset exists (value dependent)'
> > prerequisite not satisfied (NXRRSET)
> > Oct 29 11:09:37 nslinux named[2787]: client 192.168.1.154#1267: update
> > 'my.office.org/IN' denied
> > ---
>
> These messages are nothing to do with your forwarding. They are probably
> caused by being the DNS server for a domain that a bunch of Windows boxes
are
> in. The Windows boxes are trying to do dynamic DNS updates when they get
their
> DHCP leases.
>
> See http://www.ibiblio.org/gferg/ldp/BIND+AD-HOWTO/BIND+AD-HOWTO.html for
more
> info.
>
> > And my 1 Mbps Internet connection (leased line) has always been
saturated
> > since the switch-over. I don't know if that is the DNS forwarding
problem or
> > a worm/spyware on my network.
>
> You may need to use tcpdump/ethereal to see what the activity on the
network is.
>
> Paul.
>
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