Nat, Igmp Multicast, And Wan Service - ZyXEL Communications P-663HN-51 User Manual

Chapter 5 WAN Setup

5.16 NAT, IGMP Multicast, and WAN Service

This is the fourth WAN screen to display for every connection type except bridging
(for which this is the third screen). This screen varies depending on the connection
type. Use this screen to configure NAT, IGMP multicast, and WAN service settings.
Figure 30 Advanced Setup > WAN > Add (4: MER)
The following table describes the labels in this screen.
Table 20 Advanced Setup > WAN > Add (4: MER)
LABEL
Enable NAT
Enable
Fullcone NAT
Enable Firewall
Enable IGMP
Multicast
Enable WAN
Service
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DESCRIPTION
Turn on NAT to translate IP addresses between two different networks
(so you can have a private LAN with IP addresses that are different
from the public IP addresses on the WAN. See
for more details.
This field displays when you enable NAT. In full cone NAT, all requests
from the same private IP address and port are mapped to the same
public source IP address and port. Someone on the Internet only
needs to know the mapping scheme in order to send packets to a
device behind the ZyXEL Device.
The ZyXEL Device uses restricted cone NAT when you disable full cone
NAT.
Select this to turn on the ZyXEL Device's Stateful Packet Inspection
(SPI) firewall. By default the firewall blocks traffic originating from the
WAN from going to the LAN. See
configure firewall rules.
IGMP (Internet Group Management Protocol) is a network-layer
protocol used to establish membership in a Multicast group - it is not
used to carry user data. Turn this on to allow multicast traffic and
have the ZyXEL Device act as an IGMP proxy.
Select this option to use this WAN connection or clear the option to
not use this WAN connection.
Chapter 7 on page 83
Chapter 8 on page 93 for how to
P-663HN-51 User's Guide