Ricoh Network Scanning Unit A, Руководство по эксплуатации

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Configuring the Scanner Settings
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3
❖ ❖ ❖ ❖
Access Control and Access Mask
Use these setup items together to determine which of client computers has
right to access this machine when a scanner is connected to this machine as a
network TWAIN scanner.
Each of the client computers is granted or denied its access to this machine by
its IP address, which is determined by an access control entry and an access
mask entry in combination. An access control entry is used as a reference val-
ue of the IP address, while an access mask entry determines the range of the
IP addresses.
• Access control is the value that becomes the reference for restricting the cli-
ent computers that use a scanner connected to this machine as a network
TWAIN scanner.
• Access mask is the value to specify the restriction range. It is collated (log-
ically multiplied) with an access control to limit the client computers that
can use a scanner connected to this machine as a network TWAIN scanner.
Specify both the access control and the access mask in the form of
xxx.xxx.xxx.xxx (xxx:0 through 255).
Note
❒
When you wish to set no limitation of access to this machine, leave these
settings as their default values.
❒
When an IP address of a client computer falls within the logical products
of the access control entry and the access mask entry, the client computer
is granted its access to this machine.
❒
For example, a client computer that has an IP address within the range
shown under “Access-enabled IP address” column in the following table
has right to access this machine, in accordance with the entry of the access
mask to the left, when you set the access control to 192.168.15.18. In the fol-
lowing table, “xxx” means any value is available.
Access mask entry Access-enabled IP address
000.000.000.000 xxx.xxx.xxx.xxx
255.255.000.000 192.168.xxx.xxx
255.255.240.000 192.168.0.xxx
∼
192.168.15.xxx
255.255.255.000 192.168.15.xxx
255.255.255.240 192.168.15.16
∼
192.168.15.31
255.255.255.255 192.168.15.18