Configuring IPv6 with Sophos UTM 9 and KabelDeutschland

With almost every private customer contract from KabelDeutschland (KD) you'll get DS-Lite with a Carrier-grade IPv4 NAT and an IPv6 Prefix routed to your very own IPv6 Gateway - in most cases this is just your cable modem or router. I'am using a Sophos UTM - formerly known as Astaro…