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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク DirectAccess ： ウィキペディア英語版 DirectAccess DirectAccess, also known as Unified Remote Access, is a VPN-like technology that provides intranet connectivity to client computers when they are connected to the Internet. Unlike many traditional VPN connections, which must be initiated and terminated by explicit user action, DirectAccess connections are designed to connect automatically as soon as the computer connects to the Internet. DirectAccess was introduced in Windows Server 2008 R2, providing this service to Windows 7 and Windows 8 "Enterprise" edition clients. In 2010, Microsoft Forefront Unified Access Gateway (UAG) was released, which simplifies〔(Microsoft Forefront Unified Access Gateway 2010 )〕〔(Windows Server Division WebLog )〕 the deployment of DirectAccess for Windows 2008 R2, and includes additional components that make it easier to integrate without the need to deploy IPv6 on the network, and with a dedicated user interface for the configuration and monitoring. Some requirements and limitations that were part of the design of DirectAccess with Windows Server 2008 R2 and UAG have been changed (see requirements below). While DirectAccess is based on Microsoft technology, third-party solutions exist for accessing internal UNIX and Linux servers through DirectAccess.〔(Centrify DirectSecure - Integrating Windows DirectAccess with UNIX and Linux Systems )〕 With Windows Server 2012, DirectAccess is fully integrated〔(What's New in DirectAccess in Windows Server )〕 into the operating system, providing a user interface to configure and native IPv6 and IPv4 support. == Technology == DirectAccess establishes IPsec tunnels from the client to the DirectAccess server, and uses IPv6 to reach intranet resources or other DirectAccess clients. This technology encapsulates the IPv6 traffic over IPv4 to be able to reach the intranet over the Internet, which still (mostly) relies on IPv4 traffic. All traffic to the intranet is encrypted using IPsec and encapsulated in IPv4 packets, which means that in most cases, no configuration of firewalls or proxies should be required.〔(DirectAccess: Microsoft's Newest VPN Solution - Part 1: Overview of Current Remote Access Solutions )〕 A DirectAccess client can use one of several tunneling technologies, depending on the configuration of the network the client is connected to. The client can use 6to4, Teredo tunneling, or IP-HTTPS, provided the server is configured correctly to be able to use them. For example, a client that is connected to the Internet directly will use 6to4, but if it is inside a NATed network, it will use Teredo instead. In addition, Windows Server 2012 provides two backward compatibility services DNS64 and NAT64, which allows DirectAccess clients to communicate with servers inside the corporate network even if those servers are only capable of IPv4 networking. Due to the globally routable nature of IPv6, computers on the corporate network can also initiate a connection to DirectAccess clients, which allows them to remotely manage (Manage Out) these clients at any time.〔 〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「DirectAccess」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.