User's Manual

66xx/67xx Router Users Guide 62
9. On the Network Address Translation Settings you will need to enter information provided
by your ISP, then click Next.
 Enable NAT must be checked for Fullcone NAT to be used.
• NAT Public Address (available if NAT is enabled). Enter 0.0.0.0 to specify that the
device should use pubic IP addresses provided by the network.
• Enable Fullcone NAT: RFC 3489 defines four types of Network Address Translation
(NAT).
Fullcone NAT. As with other types of NAT there is a mapping from a public IP
address to a private IP address. The external public IP address is extended with the
external port. With Fullcone NAT once the mapping is created any external host may
send packets to the private IP address by sending to the external IP address and
port. Other types of NAT have restrictions such as the sending IP address must
initially have had packets sent from the private IP address and port regardless of the
external port, or from the private IP address and the external port.
 Enable Firewall: Enables Firewall.
 Enable IGMP Multicast: Configures the gateway for IGMP snooping so the gateway can
keep limit multicast traffic.
10. Click Next.
11. On the Routing — Default Gateway page set the priority of WAN interfaces used as default
gateways then click Next.