I'm developing Joomla websites and I've just been running some page speed tests at http://tools.pingdom.com/. It gives me a zero score for browser caching. I have caching already enabled in Joomla global configuration. Is there something else I should be doing for caching to work properly?
I also have GZIP enabled through Joomla global config, but the tool says I need to Specify a Vary: Accept-Encoding header
so my resource compression score is pretty low too. Is this something else that I should be doing, or should the server be doing this?