In the console tree of ISA Server Management, click
Firewall Policy.
In the details pane, click the applicable Web publishing
rule.
On the Tasks tab, click Edit Selected Rule.
On the To tab, in Server, type the name or IP
address of the computer (Web server) on which the Web site is
located.
Select Forward the original host header instead of the
actual one if ISA Server should pass the original host header
information. When ISA Server passes host header information, client
requests are routed to a particular site on the published
computer.
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
For more information on host headers, see Host Headers.
After you click Apply in the details pane, the policy is
updated. The new policy applies only to new connections.