History

• 1993:

• • Invented by Paul Francis

• 1997:

• • Begins to find its way into small routers
  • IETF purists express hate for NAT and use it to push the IPv6 agenda

• 1998-1999:

• • Many of the practical problems with NAT are overcome, some remain
  • Most protocols are designed to be specifically “NAT-friendly”

• 2000-:

• • Just about every small and residential router on the market supports NAT with VPN pass-through