Don't Reveal Your Local Hostname or IP Addresses with IIS

Option 1: Set the UseHostName property

To set the UseHostName property, follow these steps:

1.     Click Start, click Run, type cmd, and then click OK to open a command prompt.

2.     Change to the folder where the Adsutil.vbs tool is located. By default, this folder is the following:

%SYSTEMROOT%\Inetpub\AdminScripts

3.     Type the following command, where x is your site identifier:

cscript adsutil.vbs set w3svc/x/UseHostName true

Option 2: Set the SetHostName property

To set the SetHostName property, follow these steps:

1.     Click Start, click Run, type cmd, and then click OK to open a command prompt.

2.     Change to the folder where the Adsutil.vbs tool is located. By default, this folder is the following:

%SYSTEMROOT%\Inetpub\AdminScripts

3.     Type the following command, where x is your site identifier and hostname is the alternate host name that you want to use:

cscript adsutil.vbs set w3svc/x/SetHostName hostname

 

From:    http://support.microsoft.com/kb/834141/