Communicator 3000 MPE/iX Release 6.0 (Platform Software Release C.60.00) (30216-90269)

262 Chapter 10
Technical Articles
DNS BIND/iX and Syslog/iX
Loopback Address
Files A name-server needs one additional db.ADDR or
zone.ADDR file to cover the loopback network. The
loopback address is a special address that hosts use to
direct traffic to themselves. This network is always
127.0.0. and the host number is always 127.0.0.1.
Therefore, the name of this file is zone.127.0.0.
Root Cache Data
File Besides your local data files for your zone information,
the name servers also needs to know where the name
servers for the root domain are. This file is needed to
initialize cache of Internet Domain Name Servers. This
file is also called hint file.
Configure Masters
The DNS BIND/iX allows users to configure both master zone or slave
zone in your configuration file. Here are the sample configuration units
for a master zone or slave zone shown below:
Sample Configuration for a Master Zone
zone “43.10.15.IN-Addr.ARPA {
type master
file “db.15.10.43”
}
The file db.15.10.43 will have entries like:
IN SOA bindserver.india.hp.com
104 ; Serial
36000 ; Refresh every 10 hours
3600 ; Retry every hour
360000 ; Expire after 100 hours
36000 ; Minimum ttl is 10 hours
IN SOA bindserver.india.hp.com
1 IN PTR m1.india.hp.com.
2 IN PTR m2.india.hp.com.
3 IN PTR m3.india.hp.com.
There are several key parameters defined in the zone file record:
Serial The “serial” field is one of the important field defined in
the zone file. Every time you make a change to a
database file, you must increment its serial number.
Only by doing this will secondary servers know they
need to reach into your system and pull out new name
server data, a procedure is known as a “zone transfer.”