Ricoh IS760D Installationsanleitung PDF herunterladen (Seite 158)

Configuring the Scanner Settings

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❖ 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

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Ricoh IS760D Installationsanleitung Seite 158