I am running Plone 4.1 on Ubuntu 10.04. How one should configure
Varnish (public IP:80) - default.vcl from Ubuntu/Debian
plone.app.caching
... so that purging works correctly
I am not that interest getting per-page cache clears, but having Purge button working in the site control panel would be nice and giving editors to easy to clear the cache in the case of emergency.
(Alternative I can show how to use varnishadm, but I think setting up Varnish and Plone to discuss each other cannot be that difficult)