464XLAT

464XLAT according to RFC 6877 is a procedure that translates from IPv4 to IPv6 and back to IPv4. The method is often used by mobile network providers to enable IPv4 access in an IPv6-only APN based on NAT64. Two sides are involved in 464XLAT: The client side or client translator (CLAT - customer-side translator) and the provider translator (PLAT - provider-side translator) or NAT64 gateway of the provider. The LCOS supports the CLAT side to enable a network behind a router to access IPv4 networks. In contrast to DS-Lite, which establishes a 4in6 tunnel to the AFTR gateway, 464XLAT uses a translation of the IPv4 packet to IPv6. On the PLAT side, the packet is translated back into IPv4. The name 464 results from the two-way translation. Generally, the NAT64 prefix 64:ff9b::/96 is used for the translation on the provider side. To use 464XLAT, it is first necessary to configure an IPv6 connection. A 464XLAT peer is then added. The IPv4 default route then points to this peer.