[CentOS] How to enable bind to listen querys from all my network

Spook ZA spookza at gmail.com
Thu Aug 28 13:10:17 UTC 2008


Hi Guys.
I installed BIND 9.3.3rc2 straight off the CentOS 5.1 CDs.
By default the /var/named/chroot is empty, so all I did was copy the
cp -R /usr/share/doc/bind-9.3.3/sample/* /var/named/chroot/
and it inserts a working set of files.
Editing /var/named/chroot/etc/named.conf shows a sample setup that listens
on all interfaces
(which is why I set up the firewall first to block all interfaces) and has 3
views (localhost_resolver, internal and external)
Then it is a simple matter to set up forwarders in the options section for
caching and off you go.
Further tweaking should allow you to restrict the interfaces and adding
zones (master/slave/forward) into the appropriate views
will allow resolving of internal or domains hosted by the server.

By default there is no "listen-on port" option in the sample file, so it
listens on the default port (53) on all interfaces.

HTH
Regards,
  Andrew.

On Thu, Aug 28, 2008 at 11:23 AM, Miguel A. Velasco <
miguel.suscripcion at gmail.com> wrote:

> Hello all,
>
> I´ve installed a proxy Squid in my gateway and a Cache DNS Server with
> bind. The problem is the server is only resolving is own querys but not
> the client queries from my company.
> When I do:
> $service named start
> I see in /var/log/messages:
>
> starting BIND 9.3.4-P1 -u named -t /var/named/chroot
> found 1 CPU, using 1 worker thread
> loading configuration from '/etc/named.conf'
> listening on IPv6 interface lo, ::1#53
> listening on IPv4 interface lo, 127.0.0.1#53
> command channel listening on 127.0.0.1#953
> command channel listening on ::1#953
> zone 0.in-addr.arpa/IN/localhost_resolver: loaded serial 42
> zone 0.0.127.in-addr.arpa/IN/localhost_resolver: loaded serial 1997022700
> zone 255.in-addr.arpa/IN/localhost_resolver: loaded serial 42
> zone
> 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.ip6.arpa/IN/localhost_resolver:
>
> loaded serial 1997022700
> zone localdomain/IN/localhost_resolver: loaded serial 42
> zone localhost/IN/localhost_resolver: loaded serial 42
> running
>
> I don´t understand why is only "listening on IPv4 interface lo,
> 127.0.0.1#53"
> I have bind-chroot installed with the following options in /etc/named.conf:
>
> options {
>        listen-on port 53 { 127.0.0.1; 10.10.80.0; };
>        listen-on-v6 port 53 { ::1; };
>        directory       "/var/named";
>        dump-file       "/var/named/data/cache_dump.db";
>        statistics-file "/var/named/data/named_stats.txt";
>        memstatistics-file "/var/named/data/named_mem_stats.txt";
>
>        // Those options should be used carefully because they disable port
>        // randomization
>        // query-source    port 53;
>        // query-source-v6 port 53;
>
>        allow-query     { localhost; };
> };
> logging {
>        channel default_debug {
>                file "data/named.run";
>                severity dynamic;
>        };
> };
> view localhost_resolver {
>        match-clients      { localhost; };
>        match-destinations { localhost; };
>        recursion yes;
>        include "/etc/named.rfc1912.zones";
> };
>
> Where 10.10.80.0 is my network range. What may I do my server really
> listen for all my network? Nowadays it´s listenning just itself ....
>
> Thanks very much for your attention.
> Miguel A. Velasco
>
> _______________________________________________
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> CentOS at centos.org
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>
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