and have both an IPv4 and IPv6 address
I'm with Zen and also have both a 16-address IPv4 block and an IPv6 allocation. And, despite reading and following all the IPv6 guides *still* can't get it to work..
(All my internal machines can see all the way to the VDSL router. Outside machines can see the VDSL IPv6 router outside address. I've fairly conclusively proved that the router is the problem but, despite following the advice from Zen and the manufacturer, still can't get it to work. So I gave up and did something more interesting - like watching mould grow on a windfall apple..)