D-Link DSL-X1852E User Manual page 46

Section 4 - Configuration
NAT Enable:
Network address translation (NAT) translates private IP addresses to
public IP addresses before allowing private IP networks to connect
to the public network. This option is not available for related voice
service types such as VOICE, VOICE_INTERNET, and TR069_VOICE and
TR069.
Authentication
Select the authentication protocol your ISP uses. The options are
Protocol: Auto, PAP, MS-CHAP or CHAP.
Connect Mode Set the connection to be Always-on or Connect-On-Demand.
Select:
If you selected Connect-On-Demand, the following option is available:
Maximum Idle Enter the amount of time in minutes the router will maintain the
Time: Internet connection before disconnecting it if there is no activity.
IPv6 Settings
IPv6 Message
This displays the IP assignment method.
Fetch Type:
Select the IPv6 auto-configuration type: StateLess Address
DHCP IPv6 Enable:
AutoConfiguration (SLAAC) or Dynamic Host Configuration
Protocol (DHCP). If DHCP is selected, enter the default gateway or
leave it blank for automatic configuration.
IPv6 Default Enter the IP address of the default gateway if DHCP is selected or
Gateway: leave it blank for automatic configuration.
PD Enable Enable or disable prefix delegation. Also select the prefix mode:
Auto or Manual. For Manual, please enter the prefix address, for
example, 2001:b011:2000:0012::. Enter the prefix information option
by specifying preferred lifetime and valid lifetime for the prefix (600-
4294967295 seconds).
Click Save when you are done.
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