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D-Link DNS-3±1 User Manual
Section 3 - Configuration
Network Access
Network Access 
Settings
Category
User
Folder
Permission
Oplocks
The Network Access settings allow you to assign users and groups access rights to specific folders or volumes. 
By 
default, all volumes are open to anyone with read/write access on the local network. Before specific user or group rules 
can be created, the default rules must be deleted.
Assign permissions for users and groups on the 
local network here.
Determines whether the access rule will apply to 
a group or an individual user.
Select the user or group the access rule will apply 
to.
Browse and select the folder or directory you are 
controlling access to.
Set the user or group permission to Read Only or 
Read/Write.
Opportunistic locks (oplocks) are a characteristic of 
the LAN Manager networking protocol implemented 
in the 32-Bit Windows family. Oplocks are 
guarantees made by a server for a shared logical 
volume to its clients. These guarantees inform 
the Client that a file’s content will not be allowed 
to be changed by the server, or if some change 
is imminent, the client will be notified before the 
change is allowed to proceed. 
Oplocks are designed to increase network 
performance when it comes to network file sharing. However it is recommended to set the share oplocks to 
No (off)
when using file-based database 
applications 
By default Windows Vista
™
has Oplocks enabled and cannot be disabled. If you are having network performance issues with applications sharing 
files from the DNS-321, you may try to improve performance by setting Oplocks to
No (off)
. 
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