User's Manual

3 From the first bit to the third bit 224.0.0.0
.
8
9
.
16
17
.
.
From the first bit to the 8
th
bit
From the first bit to the 9
th
bit
.
From the first bit to the 16
th
bit
From the first bit to the 17
th
bit
.
.
255.0.0.0
255.128.0.0
.
255.255.0.0
255.255.128.0
.
24 From the first bit to the 24
th
bit 255.255.255.0
25 From the first bit to the 25
th
bit 255.255.255.128
26 From the first bit to the 26
th
bit 255.255.255.192
27 From the first bit to the 27
th
bit 255.255.255.224
28 From the first bit to the 28
th
bit 255.255.255.240
29 From the first bit to the 29
th
bit 255.255.255.248
30 From the first bit to the 30
th
bit 255.255.255.252
31 From the first bit to the 31
st
bit 255.255.255.254
0 The 32
nd
bit 255.255.255.255
* Masking on 32
nd
bit has the same effect as masking none, and in NetServer 0 instead of 32 is used.
Masking 32 bits means that all the 32 bits are network ID, and masking none means that all the 32 bits
are host ID. Therefore masking all the 32 bits or none means that the provided IP address itself is
applied with a command of ‘Allow’ or ‘Deny’.
If you want to allow only the IP addresses from 192.168.1.61 to 192.168.70, you may set as
bellows.
Default Policy Deny
IP address 192.168.1.60 Masking 30 Policy Allow
IP address 192.168.1.60 Masking 0 Policy Deny
IP address 192.168.1.64 Masking 29 Policy Allow
IP address 192.168.1.71 Masking 0 Policy Deny
* The IP addresses in black squares can be any IP address of the sub-networks. In the first square,
192.168.1.60 to 192.168.1.63 is to be assigned. And in the second square 192.168.1.64 to
192.168.1.71 is to be assigned.
(2) Image Encryption Mode
Administrator may restrict people to receive images from one’s NetServer, even though people
accessed it. If ‘Image Encryption Mode’ is enabled and a pin number is assigned, people have to
key in the assigned pin number to see image after accessing NetServer image viewers. Encryption
PIN (number or character) should be consisted in 9 bytes. 9 bytes are equal to 9 English characters.
‘Security Configuration’ is a double-checking function to control accessibility, utilizing ‘User
Account Configuration’ at the same time.
Principle in filtering
The sub-network range is smaller;
the priority in filtering is earlier. Therefore a single IP
address (masking with 0) has the first priority.