proxy help?

I’m new to proxies and looking for help.

In my apache2 httpd.conf file I added the following:

ProxyPass /foo/

ProxyPassReverse /foo/

In my Cesium viewer initialization I added the proxy:

imageryProvider : new Cesium.BingMapsImageryProvider({ url : ‘//’,

key : ‘-- my key --’,

proxy: new Cesium.DefaultProxy(’/foo/’) })

This returns a browser error that indicates that instead of tile imagery it is trying to load a default page one gets at which sends you to

Any ideas here?