When I activate CiviCRM I get the following notices regarding varnish status:
Varnish is running but cannot cache.
A plugin or theme is setting a PHPSESSID cookie on every pageload. This makes Varnish not deliver cached pages.
Something is setting the header Cache-Control to "no-cache" which means visitors will never get cached pages.
Something is setting the header Pragma to "no-cache" which means visitors will never get cached pages.
The site is unusable when civi is activated, I can hardly navigate the civi admin pages - I get 'page not found' errors about half the time.
Is there a way to get CiviCRM to play with varnish?