D-Link DSL-2740B User Manual page 29

Section 3 - Configuration
DNS AND DEFAULT GATEWAY
Select Obtain DNS server address automatically to get DNS from
your ISP.
Or
Select Use the following DNS server addresses to type the DNS IPs
in the Preferred DNS server and Alternate DNS server.
Set PVC values which are from your ISP on VPI/VCI
Enable the Enable NAT when you want to have WAN and LAN.
Enable the Enable Firewall when you want to have the basic filter
function, for example, ICMP ping to DSL-2740B.
Enable the Enable IGMP Proxy when you want to let IAD to play as a
IGMP proxy which can help proxy server to send IGMP query packets to
the IPTV clients.
Enable VLAN and type the VLAN ID (0-4095) which your ISP assigns.
Click on the Apply button.
D-Link DSL-2740B User Manual 29