Chapter 5 WAN Setup
P-870HN-5xb User’s Guide
90
5.6.1.4 NAT, IGMP Multicast and Firewall Activation
The screen is available only when you select IP over Ethernet in the WAN
Service Configuration screen or set the DSL link type to IPoA for the ATM
interface and configure a WAN connection using the ATM interface.
Figure 40 WAN Configuration: NAT, IGMP Multicast and Firewall Activation: IPoE/
IPoA
The following table describes the labels in this screen.
Subnet Mask Enter the Device’s subnet mask. It must be smaller than C class
(255.255.255.0).
Assign Public IP
to LAN PCs by
DHCP
Select this to have the Device give the LAN DHCP clients public IP
addresses. LAN clients can still configure static private IP addresses
and access the Internet.
Clear this option to assign the LAN DHCP clients private IP addresses.
LAN clients can still configure static public IP addresses and access the
Internet.
Back Click this button to return to the previous screen.
Next Click this button to continue.
Table 18 WAN Configuration: IPoA
LABEL DESCRIPTION
Table 19 WAN Configuration: NAT, IGMP Multicast and Firewall Activation: IPoE
LABEL DESCRIPTION
Enable NAT Select this check box to activate NAT on this connection.
Enable Fullcone
NAT
Select this check box to activate full cone NAT on this connection.
This field is available only when you select Enable NAT.
Enable Firewall Select this check box to activate Firewall on this connection.
Enable IGMP
Multicast Proxy
Select this check box to have the Device act as an IGMP proxy on this
connection. This allows the Device to get subscribing information and
maintain a joined member list for each multicast group. It can reduce
multicast traffic significantly.
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