Chapter 11 Network Address Translation (NAT)
AMG1312-T Series 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 73 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 AMG1312-T Series registers with the SIP register server, the SIP ALG translates the
AMG1312-T Series’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 AMG1312-T Series is behind a SIP ALG.
Table 54 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 AMG1312-T Series 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.
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