NAT is a colossal pain in the ass. I shudder to think of the number of man-years that have been spent on NAT traversal. NAT breaks one of the fundamental functi

NAT is a colossal pain in the ass. I shudder to think of the number of man-years that have been spent on NAT traversal. NAT breaks one of the fundamental functions of an IP address - a unique identifier for a network device. It turns a simple identifier into a weird, amorphous abstraction. IPv6 isn't perfect, but we could have avoided a lot of hassle if we'd started off with it.