Novell LINUX ENTERPRISE SERVER 10 - INSTALLATION AND ADMINISTRATION 11-05-2007, Installation Manual

Page: 644 / 982

The zone options:
type master;
By specifying
master
, tell BIND that the zone is handled by the local name
server. This assumes that a zone file has been created in the correct format.
type slave;
This zone is transferred from another name server. It must be used together with
masters
.
type hint;
The zone
.
of the
hint
type is used to set the root name servers. This zone defini-
tion can be left as is.
file
my-domain.zone
or file “slave/other-domain.zone”;
This entry specifies the file where zone data for the domain is located. This file is
not required for a slave, because this data is fetched from another name server. To
differentiate master and slave files, use the directory
slave
for the slave files.
masters {
server-ip-address
; };
This entry is only needed for slave zones. It specifies from which name server the
zone file should be transferred.
allow-update {! *; };
This option controls external write access, which would allow clients to make a
DNS entry—something not normally desirable for security reasons. Without this
entry, zone updates are not allowed at all. The above entry achieves the same be-
cause
! *
effectively bans any such activity.
33.5 Zone Files
Two types of zone files are needed. One assigns IP addresses to hostnames and the
other does the reverse: it supplies a hostname for an IP address.
626 Installation and Administration