This tool is for use with the Ceph RADOS Gateway This way you can run multiple Varnish caches in front of a Ceph RADOS Gateway and still cache. Via multicast the nodes will (Layer 2) send out any PUT or DELETE requests they got in and ban those objects from their cache.
wido/varnishncsa-multicast-banner
A process which reads varnishncsa and bans all objects which came in via PUT or DELETE
Python