In the console tree of ISA Server Management, click
Firewall Policy.
On the Toolbox tab, click Network Objects.
On the toolbar beneath Network Objects, expand Server
Farms.
Double-click a server farm to open its properties.
On the Servers tab, select a server from the list of
servers.
Click Drain to drain the server.
When you want the server to resume servicing requests, click
Resume.
Notes
To open ISA Server Management, click Start, point to
All Programs, point to Microsoft ISA Server, and then
click ISA Server Management.
For ISA Server 2006 Enterprise Edition, expand
Microsoft Internet Security and Acceleration
Server 2006, expand Arrays, expand
Array_Name, and then click Firewall
Policy.
For ISA Server 2006 Standard Edition, expand Microsoft
Internet Security and Acceleration Server 2006, expand
Server_Name, and then click Firewall
Policy.
Important
If you need to perform maintenance on a server, follow these
steps:
Drain the server.
Wait for the number of existing Web connections to drop to an
acceptable level. For example, use Internet Information Services
(IIS) performance counters to monitor the number of
connections.
Disconnect the server and perform maintenance tasks.
Reconnect the server and click Resume in the server farm
properties.