Chapter 11 Network Address Translation (NAT)
AMG1302-T11C User’s Guide
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11.4 The DMZ Screen
If you need to allow packets from a specific WAN connection to your local network, NAT supports a
default server IP address. A default server receives packets from the specified WAN connection and
the ports that are not specified in the
NAT Port Forwarding Setup
screen.
Figure 72
Network Setting > NAT > DMZ
The following table describes the fields in this screen.
11.5 The ALG Screen
Some NAT routers may include a SIP Application Layer Gateway (ALG). A SIP ALG allows SIP calls
to pass through NAT by examining and translating IP addresses embedded in the data stream.
When the AMG1302-T11C registers with the SIP register server, the SIP ALG translates the
AMG1302-T11C’s private IP address inside the SIP data stream to a public IP address. You do not
need to use STUN or an outbound proxy if your AMG1302-T11C is behind a SIP ALG.
Use this screen to enable and disable the SIP (VoIP) ALG in the AMG1302-T11C. Click
Network
Setting > NAT > ALG
to open the following screen.
Figure 73
Network Setting > NAT > ALG
Table 53
Network Setting > NAT > DMZ
LABEL
DESCRIPTION
WAN Interface
Select a WAN PVC connection (
PVC0
~
PVC7
) from which you want to forward the traffic
to the specified default server.
Default Server
Address
Enter the IP address of the default server which receives packets from ports that are not
specified in the
NAT > Port Forwarding
screen.
Note: If you do not assign a
Default Server Address
, the AMG1302-T11C discards all
packets received for ports that are not specified in the
NAT Port Forwarding
screen.
Apply
Click
Apply
to save your changes.
Cancel
Click
Cancel
to restore your previously saved settings.