Although computers running Windows Vista® or Windows® 7 can host folder
targets, they are generally unsuitable for use as file servers. In
addition to their limit of 10 concurrent incoming SMB connections,
computers running Windows Vista or Windows 7 by default cannot navigate a
DFS namespace to a folder target hosted on the local computer. For
example, if a user on a computer running Windows Vista (\\client1)
attempts to connect to a DFS folder whose folder target is a shared
folder located on the same computer (\\client1), the connection attempt
will fail. This is considered a loopback connection. This behavior is
designed to help prevent a rogue namespace server from redirecting a
client computer to an administrative share on the client computer (for
example \\127.0.0.1\C$), and then reading or writing files in the shared
folder.
To allow a client computer access to folder targets located on the local computer (the default behavior on servers), open Registry Editor, navigate to the following location: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Mup\Parameters , create a DWORD (32-bit) value named EnableDfsLoopbackTargets , and then set the value to 1 . After changing the value, restart the computer.
To disable DFS loopback targets (the default behavior on client computers), set the value to 0 . After changing the value, restart the computer.(from http://technet.microsoft.com/en-us/library/cc753448%28WS.10%29.aspx) |