ref: e93f7885dad16245a4f772d4305cfc00ba5d8a44
parent: 137533bd69847030d716658e1772c6320f9282bb
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Thu Mar 31 19:53:10 EDT 2016
6in4: ingress filter multicast and link-local, but allow relay traffic