DNS Configuration and Management Manual (G06.27+, H06.05+, J06.03+)

DNS Server Configuration
HP DNS Configuration and Management Manual—529432-003
B-11
Master Server db.domain Files
The SOA record specifies the name of the host this data file was created on, an
electronic mail address of the name server’s technical contact, and the following
values:
Serial
indicates the version number of this file, incremented whenever the data is
changed.
Refresh
indicates (in seconds) how often a slave name server must try to update its
data from a master server.
Retry
indicates (in seconds) how often a slave server must retry after an attempted
refresh fails.
Expire
indicates (in seconds) how long the slave name server can use the data before
it expires for lack of a refresh.
Minimum ttl
indicates the minimum number of seconds the name server is allowed to cache
data. After the time-to-live (ttl) value expires, the name server must discard the
cached data and obtain new data from the authoritative name server’s
NS
name server records. The NS records provide the names of the name servers
and the domains for which the domain has authority. The domain for the name
servers in the example db.div file is the current origin (
div.inc.com) because
@ was the last domain specified.
A
Address records. A records provide the Internet addresses for all the hosts in the
domain. The current origin is appended to names that do not end with a dot. For
example, localhost in the first
A record is interpreted as
localhost.div.inc.com.
HINFO
Host Information records. The HINFO records indicate the hardware and operating
system of the host.
CNAME
Canonical Name record. The CNAME record specifies an alias for a host name.
When a name server looks up a name and finds a CNAME record, the name
server replaces the name with the canonical name and looks up the new name.