MACROMEDIA COLDFUSION 4.5-ADMINISTRING COLDFUSION SERVER Manual page 192

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8. Ensure that the A Record record type is selected from the Record Type list box.
Note
A Records correlate to Address records for your hosts, CNAME Records correlate to
aliases you want to use for your hosts, and PTR records correlate to reverse name
translations (IP address to Host name).
9. Enter the Host name and corresponding IP address for an explicit Web server that
will host your Web site in the Host Name and IP Address fields, respectively.
For example, your explicit Host Name entry might be www1 and the IP Address for
that server might be 193.168.03.1.
10. Leave the Create Associated PTR Record check box enabled to automatically
create the required reverse mapping record (IP address to host name) for each
explicit server.
11. Click OK.
12. Repeat steps 6 through 10 for each explicit server hosting the site that will be in
your cluster.
The DNS record entries for your site should look similar to the following entries
when you're done.
ClusterCATS requires that the explicit servers you use to host your
Web site have associated A records defined for them in DNS, not
CNAME records.
Administering ColdFusion Server