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Split DNS - Underlying Constructs
DNS Boot File (bootfile)
7
Use the boot file to define where the name server is to get its initial data.
Format guidelines:
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Lines can be blank, comments, or statements
Comments begin with a semi-colon (;) and continue until the end of the line
Each statement begins on a new line and cannot continue on subsequent lines
Domain names must not contain a trailing dot (.)
Format:
keyword value
Statements:
directory path_name
Directory where the files listed in the boot file reside.
cache file
Contains the initial records for the cache and tells where the root servers are. More
than one cache file can be specified.
nocache
Indicates that the name server should be non-caching. This restricts the name server
from caching the address of other name servers to query. Thus, the name server will
not make queries directly to the outside but will query the forwarders instead.
interface IP_addresses
Specify which interface the DNS server will listen to. To listen on multiple interfaces,
use this statement multiple times.
primary domain file
Indicates that this is the primary name server for domain. file contains the records
for the domain. One or more primary statements can be specified.
secondary domain IP_addresses file
Indicates that this is the secondary name server for domain. A secondary name
server is a name server that must occasionally poll a (usually primary) name server to
get up-to-date information about its domain. IP_addresses is one or more name servers to contact for more current records of domain. file contains the initial records for
the domain.
forwarders IP_addresses
Provides a list of one or more IP_addresses that the name server should contact
when a query is received for a name outside its authority.
slave
Forces the name server to make queries only to forwarders. This option is normally
used on machines that will run a server, cannot be given Internet access, and have
access to a host with Internet access.
CyberGuard Firewall Manual
II-129