MACROMEDIA COLDFUSION 4.5-ADMINISTRING COLDFUSION SERVER Manual page 190

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The DNS Manager utility appears.
2. Right-click the zone created for your site and choose New Host.
The New Host dialog box appears.
3. Enter
the site in the Host IP Address field.
Note
4. Click Add Host.
5. Repeat steps 3 and 4 for each server hosting the site that will be in your cluster.
6. Click Done to close the New Host dialog box.
in the Host Name field and enter the IP address of a server that will host
www
Do not enable the Create Associated PTR Record check box. You only
want forward mappings associated with the site name and no
reverse mappings for round-robin DNS to work properly.
Administering ColdFusion Server