Access the Server Manager, and click the Filters tab.
Click the Suppress Outgoing Headers link.
The Suppress Outgoing Headers page displays.
Enter a comma separated list of request headers to be suppressed in the Suppress Headers text box.
For example, to suppress the From and User-Agent headers, type from,user-agent. The headers you type are not case-sensitive. For more information on regular expressions, see “Understanding Regular Expressions” in Chapter 16, Managing Templates and Resources.
Click Restart Required.
The Apply Changes page displays.
Click the Restart Proxy Server button to apply the changes.