There appears to be some confusion about how to disable IPv6 on Mac’s and Vista. On Mac’s, you will need to enable the firewall for IPv6 and block all inbound and outbound IPv6 connections. For the geeks in the group, that is protocol 41, 43, 44, 58, 59 and 60 for inbound and outbound.

Oh, J H woodyatt – I don’t remember any IPv6 worms as of today --- which ‘evil IPv6 worms’ are you talking about? The "Effect of DNS Delays on Worm Propagation in an IPv6 Internet “ that discussed the inability of worms to propagate in the IPv6. The quote from the paper is “Fast-propagate worm is impossible in IPv6â€ because "in a /64 IPv6 sub-network, which is the smallest sub-network in IPv6 – it will take 30 thousand years to compromise most of the vulnerable hostsâ€. I like my Mac, but don’t expect to be around for 30,000 years.