Click the "Web Content" tab

Click "Add Site" located in the bottom left and enter "*.keenspace.com" then click "Ok".

Highlight "*.keenspace.com" in the list of sites and then on the right uncheck the "Use default settings" on the "Information about visited sites" section and set it to "Permit"

Click "Ok" at the bottom of the window and close the "Norton Personal Firewall" window.

Refresh your web browser and you should see the site.