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DSL-2750E User Manual 
23 
The above figure shows the when the Security Mode is set as
Auto (WPA or 
WPA2)
. The following table describes the parameters in this page. 
Field 
Description 
WPA 
Encryption 
You can select WPA encryption to be 
AES 
or 
TKIP+AES
. 
WPA Mode 
Select 
Auto (WPA or WPA2)-PSK
, enter the 
pre-shared key in the 
Pre-Shared Key 
field. 
Select 
Auto 
(WPA 
or 
WPA2)-Enterprise 
(RADIUS)
, enter the port, IP address, and password of 
the Radius server. You need to enter the username 
and password provided by the Radius server when the 
wireless client connects the modem. 
Group Key 
When WPA encryption is applied, messages sent are 
 
                 
                                
                    
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Field 
Description 
Update Interval 
encrypted with a password. For higher security, WPA 
password is updated periodically. This value is the 
update interval of the WPA password. 
Click 
Apply
to save the settings. 
3.2.4 
Local Network 
You can configure the LAN IP address according to the actual application. The 
preset IP address is 
192.168.1.1. You can use the default settings and DHCP 
 
service to manage the IP settings for the private network. The IP address of the 
device is the base address used for DHCP. To use the device for DHCP on your 
LAN, the IP address pool used for DHCP must be compatible with the IP address 
of the device. The IP address available in the DHCP IP address pool changes 
automatically if you change the IP address of the device. 
You can also enable the secondary LAN IP address. The two LAN IP addresses 
must be in different networks. 
Choose
Setup
> 
Local Network
. The 
Local Network
page shown in the 
following figure appears. 
 
                 
                                
                    
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The following table describes the parameters in this page 
Field 
Description 
Router IP Address 
Enter the IP address of LAN interface. It is 
recommended to use an address from a block that is 
reserved for private use. This address block is 
192.168.1.1
- 
192.168.255.254
. 
Subnet Mask 
Enter the subnet mask of LAN interface. The range of 
subnet mask is from 
255.255.0.0
-
255.255.255.254
. 
Domin Name 
Enter the domain name if you know. If you leave this 
blank, the domain name obtained by DHCP from the 
ISP is used. You must enter host name (system 
name) on each individual PC. The domain name can 
be assigned from the router through the DHCP 
 
                 
                                
                    
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Field 
Description 
server. 
Configure the 
second IP Address 
and Subnet Mask 
for LAN 
Select it to enable the secondary LAN IP address. 
The two LAN IP addresses must be in the different 
network. 
Enable DHCP 
Server 
Enable the router to assign IP addresses, IP default 
gateway and DNS Servers to the host in Windows95, 
Windows NT and other operation systems that 
support the DHCP client. 
DHCP IP Address 
Range 
It specifies the first IP address in the IP address pool. 
The router assigns IP address that base on the IP 
pool range to the host. 
DHCP Lease Time 
The lease time determines the period that the host 
retains the assigned IP addresses before the IP 
addresses change. 
Click 
Apply
to make the settings take effect. 
The 
DHCP RESERVATIONS LIST
shown in the following figure appears. 
Click 
Add
to add DHCP (optional). The page shown in the following figure 
appears. 
 
                 
                                
                    
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Select 
Enable
to reserve the IP address for the designated PC with the 
configured MAC address. The 
Computer Name
helps you to recognize the PC 
with the MAC address, for example, Father’s Laptop. Click 
Apply 
to save the 
settings. 
After the DHCP reservation is saved, the DHCP reservations list displays the 
configuration. 
3.2.5 
LAN IPv6 
Choose
Setup
> 
LAN IPv6
.
The page shown in the following figure appears.This 
page allows you to config IPv6 LAN. 
The following table describes the parameters of this page. 
Field 
Description 
IPv6 Interface 
Address 
The address through which PCs access the