Chapter 5 WAN Setup

5.5.1.4 NAT, IGMP Multicast and Firewall Activation

The screen is available only when you select IP over Ethernet in the WAN Service Configuration screen.

Figure 35 WAN Configuration: NAT, IGMP Multicast and Firewall Activation

The following table describes the labels in this screen.

Table 19 WAN Configuration: NAT, IGMP Multicast and Firewall Activation

LABEL

DESCRIPTION

Enable NAT

Select this option to enable NAT on the P-870HN-51D. You can also

 

select the NAT Type you want the P-870HN-51D to implement. The

 

choices are as follows:

 

• Symmetric NAT (default) - Symmetric NAT maps requests from

 

the same private IP address and port to a different public source IP

 

address and/or port depending on the packet's destination IP

 

address.

 

• Port Restricted Cone NAT - Restricted cone NAT maps all

 

requests from the same private IP address and port to the same

 

public source IP address and port.

 

• Restricted Cone NAT - Restricted cone NAT maps all requests

 

from the same private IP address to the same public source IP

 

address.

 

• Full Cone 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 NAT router.

 

 

Enable Firewall

Select this check box to activate Firewall on this connection.

 

 

Enable IGMP

Select this check box to have the P-870HN-51D act as an IGMP proxy

Multicast Proxy

on this connection. This allows the P-870HN-51D to get subscribing

 

information and maintain a joined member list for each multicast

 

group. It can reduce multicast traffic significantly.

 

 

Back

Click this button to return to the previous screen.

 

 

Next

Click this button to continue.

 

 

 

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P-870HN-51D User’s Guide