MACROMEDIA COLDFUSION 4.5-ADMINISTRING COLDFUSION SERVER Manual page 280

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Restricting cluster members
ClusterCATS lets you restrict a cluster member from receiving any HTTP requests by
enabling a configuration option. You may want to do this for a variety of reasons,
including server maintenance, server software updates, and as a load management
method.
To restrict an active cluster member from receiving HTTP requests:
1. Open ClusterCATS Web Explorer if it's not already open.
2. Click the Show Cluster link.
The Show Cluster page appears.
3. Enter the fully qualified host name of a server that you want to restrict in the Web
Server Name field and click OK.
The Cluster Member List page appears.
Administering ColdFusion Server