This section covers some of the most common DNS record types.
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A record: This record maps an IP Address to a hostname.
www IN A 192.168.1.12 -
CNAME record: Used to create an alias to an existing A record. You cannot create a CNAME record pointing to another CNAME record.
web IN CNAME www -
MX record: Used to define where email should be sent to. Must point to an A record, not a CNAME.
IN MX mail.example.com. mail IN A 192.168.1.13 -
NS record: Used to define which servers serve copies of a zone. It must point to an A record, not a CNAME. This is where Primary and Secondary servers are defined.
IN NS ns.example.com. IN NS ns2.example.com. ns IN A 192.168.1.10 ns2 IN A 192.168.1.11
The DNS HOWTO explains more advanced options for configuring BIND9.
For in depth coverage of DNS and BIND9 see Bind9.net.
DNS and BIND is a popular book now in it's fifth edition.
A great place to ask for BIND9 assistance, and get involved with the Ubuntu Server community, is the #ubuntu-server IRC channel on freenode.
