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MCTS 70-680: Windows 7 DirectAccess

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  • Description: DirectAccess is a technology implemented in Windows 7 to allow a computer to automatically create a secure connection back to head office from remote without any user interaction. This video looks at how to configure DirectAccess on Windows 7.

    DirectAccess configuration demo 05:00
    Netsh 07:12

    Windows 7 Enterprise or Ultimate Edition
    Windows Server 2008 R2 for DirectAccess
    Windows server 2008 or above for DC's and DNS
    Public key infrastructure. (Certificates)
    Network Access Protection (NAP) optionally

    IPv6 and DirectAccess
    DirectAccess requires IPv6 to operate. Between the client and the server there may not be a fully functional IPv6 network. For this reason, DirectAccess also supports transition technologies. If no transition technologies are available, DirectAccess can use IP over HTTPS.

    If your computer has a public IPv4 address, DirectAccess will attempt to create a connection using 6to4. If this fails, remember that 6to4 does not support IPv4 Nat devices, DirectAccess will then attempt to use Terdeo. If this fails, possibly due to being blocked by a firewall, DirectAccess will attempt to create an IP HTTPS connection back to the server.

    Group Policy DirectAccess
    In order for DirectAccess to operate it muse be able to locate the Server that is configured with DirectAccess using DNS. In order to do this the group policy settings are found under the following.
    Computer Configuration-Windows Settings-Name Resolution Policy
    The settings for DirectAccess can be found under the DNS settings for Direct Access tab. From here you can configure the DNS servers that DirectAccsss will use to locate servers in your company. If they are publicly available you can just enter in the IP address, otherwise you can configured a proxy server or and IPSec connection back to your DNS servers if they have been set up.

    Group policy IPv6 Transition Technologies
    Since DirectAccess requires IPv6 to operate and you may not have a complete IPv6 network between your client and server, DirectAccess does support transition technologies. These setting can be found under
    Computer Configuration-Administrative templates-Network-TCPIP settings-IPv6 Transition Technologies

    NetSH commands
    netsh interface IPv6 set teredo EnterpriseClient (IPAddress) (Port)
    netsh interface IPv6 set teredo disable
    Netsh interface 6to4 set relay (IPAddress)
    netsh interface 6to4 set relay disable
    netsh interface httpstunnel add interface client (http address)
    netsh interface httpstunnel delete interface
    netsh namespace show policy
    netsh namespace show effectivepolicy
    netsh interface httpstunnel show interfaces
    netsh interface teredo show state
    netsh interface 6to4 show state

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