Billion BiPAC 7700N User Manual page 59

Enable NAT: The NAT (Network Address Translation) feature allows multiple users to access the
Internet through a single IP account by sharing the single IP address. If users on your LAN have
their own public IP addresses to access the Internet, NAT function can be disabled. When enabled,
a Fullcone NAT parameter will appear, you can determine whether to enable Fullcone NAT. While
only NAT enabled, the default NAT type Port-Restricted cone NAT will be used. For detail, please
turn to page 47 for help.
Enable Firewall: Check/uncheck this item to enable/disable firewall function.
Enable IGMP Multicast: IGMP (Internet Group Membership Protocol) is a protocol used by IP hosts
to report their multicast group memberships to any immediately neighboring multicast routers. Check
this item to enable IGMP multicast on that WAN interface for multicast forwarding.
Click Next to go to set default gateway.
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