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PCI Complaince failure "web server leaks a private IP address through its HTTP headers."

Last Modified: 2012-08-14
I am just sorting out the PCI compliance for our organisation.
We have failed due to the "web server leaks a private IP address through its HTTP headers. Description : This may expose internal IP addresses that are usually hidden or masked behind a Network Address"

The PCI complaince scan is reporting this leak on ports 443 and 80.

We are running SBS2008, IIS7 (IIS6 is installed just for FTP but this is disabled)

I found a possible solution at  http://blogs.iis.net/rakkimk/archive/2008/06/07/iis7-prevent-the-server-sending-its-private-ip-address-for-a-request-made-by-http-1-0-clients-with-no-host-header.aspx

which instructs you to run the following
appcmd.exe set config  -section:system.webServer/serverRuntime /alternateHostName:"2008SBSServerName"  /commit:apphost

I tried the above with no luck.

Any other ideas to solve this issue?
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