Re: If IP6v hadn't been made so goddamn complicated...
bob: say it with me: "NAT is NOT a security device!"
Just about any router worth its salt that can grok IPv6 can block inbound IPv6 connections by default just as easily as it can IPv4 without NAT. This is basic stateful firewalling aka connecion tracking in Linux. Hell Verizon Wireless does this automatically for all of their IPv6 clients.