How to truly disable Ethernet and Firewire? I'm working on securing my Mac completely and utterly. I may be going to China for a business trip and I've been advised to do this but not provided steps that work for a Mac.

Is it safe to say that by setting "IPv4 Configure" to disabled that this will make it impossible for anyone to violate my Macbook through either Ether or Firewire? Should I do similar for an IPv6 setting?
Recommend taking a "throw-away" computer and not one you will continue using after returning.  You're not going to be able to secure it just by disabling access (even with restricting boot).