What is AFTR
AFTR is an implementation of an IPv4/IPv6 transition protocol based on Dual-Stack Lite, which is under development by several large ISPs within the IETF protocol standards development process.
Dual-Stack Lite is one of a family of technologies intended to ease the transition from IPv4 to IPv6 by allowing legacy IPv4 end sites such as home PCs to interact with IPv4 content providers and services over an IPv6 carrier infrastructure. This allows ISPs to deploy IPv6 as the last available IPv4 addresses are allocated, without requiring expensive, complex technology changes immediately for end users or server operators.
The initial version of AFTR consists of the code for a server that can give out either IPv4 or IPv6 addresses via DHCP, and tunnel via IPv6 to an arbitrary IPv4 endpoint elsewhere.
