Novell LINUX ENTERPRISE SERVER 10 SP2 - INSTALLATION AND ADMINISTRATION Installation Manual page 654

Do not use IPv4 addresses with IPv6 mapping.
Line 18:
The alias www can be used to address mond (CNAME means canonical name).
The pseudodomain in-addr.arpa is used for the reverse lookup of IP addresses
into hostnames. It is appended to the network part of the address in reverse notation.
So 192.168.1 is resolved into 1.168.192.in-addr.arpa. See Example 33.7,
"Reverse Lookup" (page 636).
Example 33.7 Reverse Lookup
$TTL 2D
1.168.192.in-addr.arpa. IN SOA gateway.world.cosmos. root.world.cosmos. (
1
2
3
Line 1:
$TTL defines the standard TTL that applies to all entries here.
Line 2:
The configuration file should activate reverse lookup for the network
192.168.1.0. Given that the zone is called 1.168.192.in-addr.arpa,
should not be added to the hostnames. Therefore, all hostnames are entered in their
complete form—with their domain and with a . at the end. The remaining entries
correspond to those described for the previous world.cosmos example.
Lines 3–7:
See the previous example for world.cosmos.
636 Installation and Administration
pluto IN
pluto IN
2003072441
1D
2H
1W
2D )
IN NS
IN PTR
IN PTR
IN PTR
AAAA 0 2345:00C1:CA11:0001:1234:5678:9ABC:DEF0
AAAA 0 2345:00D2:DA11:0001:1234:5678:9ABC:DEF0
; serial
; refresh
; retry
; expiry
; minimum
gateway.world.cosmos.
gateway.world.cosmos.
earth.world.cosmos.
mars.world.cosmos.