FutureSoft IPv6 is a portable implementation of the next generation Internet Protocol Version 6, complying with the relevant RFCs and Internet drafts. The major components of the software are IPv6 Core, Path MTU Discovery, Neighbor Discovery (ND), ICMPv6, UDP over IPv6 (UDP6), Transition Mechanisms for IPv6 Hosts and Routers (Tunnel), MLD, IPSEC and Ping6 Utility.