Red Hat ENTERPRISE LINUX 5 - DEPLOYMENT Deployment Manual page 234

Chapter 17. Berkeley Internet Name Domain (BIND)
root-delegation-only
Turns on the enforcement of delegation properties in top-level domains (TLDs) and root zones
with an optional exclude list. Delegation is the process of dividing a single zone into multiple
subzones. In order to create a delegated zone, items known as NS records are used. NameServer
records (delegation records) announce the authoritative nameservers for a particular zone.
The following root-delegation-only example specifies an exclude list of TLDs from whom
undelegated responses are expected and trusted:
options { root-delegation-only exclude { "ad"; "ar"; "biz"; "cr"; "cu"; "de"; "dm"; "id";
"lu"; "lv"; "md"; "ms"; "museum"; "name"; "no"; "pa"; "pf"; "se"; "sr"; "to"; "tw"; "us";
"uy"; }; };
statistics-file
Specifies an alternate location for statistics files. By default, named statistics are saved to the /
var/named/named.stats file.
There are several other options also available, many of which rely upon one another to work properly.
Refer to the BIND 9 Administrator Reference Manual referenced in
Documentation"
and the bind.conf man page for more details.
17.2.1.4. zone Statement
A zone statement defines the characteristics of a zone, such as the location of its configuration file
and zone-specific options. This statement can be used to override the global options statements.
A zone statement takes the following form:
zone <zone-name><zone-class> { <zone-options>; [<zone-options>; ...] };
In this statement, <zone-name> is the name of the zone, <zone-class> is the optional class of the
zone, and <zone-options> is a list of options characterizing the zone.
The <zone-name> attribute for the zone statement is particularly important. It is the default value
assigned for the $ORIGIN directive used within the corresponding zone file located in the /var/
named/ directory. The named daemon appends the name of the zone to any non-fully qualified
domain name listed in the zone file.
Note
If you have installed the caching-nameserver package, the default configuration file
will be in /etc/named.rfc1912.zones.
For example, if a zone statement defines the namespace for example.com, use example.com as
the <zone-name> so it is placed at the end of hostnames within the example.com zone file.
For more information about zone files, refer to
The most common zone statement options include the following:
208
Section 17.7.1, "Installed
Section 17.3, "Zone Files".