DirectAccess is an integrated part of Windows 7 Enterprise & Ultimate, and Windows Server 2008 R2 operating systems, that provides a secure, flexible architecture for enhanced remote access and transition to IPv6. Its designed to be compatible with most existing Internet, perimeter, and intranet environments by using IPv6-inside-IPv4 tunneling and IPv6-to-IPv4 translation where necessary. A DirectAccess solution may require IPv6/IPv4DNS and IPv6/IPv4NAT at network perimeter to provide access to existing IPv4-only internal hosts. New IETF specifications for DNS64 and NAT64 should provide IPv6/IPv4DNS and IPv6/IPv4NAT products that’re compatible with DirectAccess. Forefront Unified Access Gateway DirectAccess server provides a comprehensive DirectAccess solution, with a compatible IPv6/IPv4DNS and IPv6/IPv4NAT, network load balancing, and high availability.
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