D-Link DIR-620 User Manual page 46

DIR-620 Multifunction Wireless Router Supporting WiMAX,
3G GSM/CDMA with Built-in Switch
User Manual
If needed, change the connection settings available in the Miscellaneous section.
Parameter
Enable RIP
Enable IGMP Multicast
NAT
Firewall
Click the Next button to continue.
Figure 40. Configuring PPTP + Static IP WAN connection.
Select the checkbox to allow using RIP for this connection.
Select the checkbox to allow multicast traffic from the external
network (e.g. video streaming) to be received.
Select the checkbox if you want one WAN IP address to be used for
all computers of your LAN.
Select the checkbox to enable protection against ARP and DDoS
attacks.
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Configuring via Web-based Interface
Description