We have a situation here where computers running Windows 7 or Windows 2008 behind a Squid proxy are unable to connect to the Windows Update service in the Internet. Our linux guys said that the request hits the squid without authentication information, so that it's denied. From the Windows box, we see a box asking for credentials, but none will work. The computers can navigate the internet with no issues using Internet Explorer pointed to the squid box. The problem occurs only when we use the Windows Update control panel applet.
Here is the error found in the Squid log:
192.168.141.11 TCP_DENIED/407 2009 GET http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
- NONE/- text/html
Do you guys know anything about this issue involving newer versions of Windows? Do you guys know how to fix it?
Linux version: CentOS 5.6 64 bits
Squid version 2.6.STABLE21