Chapter 8 Network Address Translation (NAT)
P-2812HNU-51c User’s Guide
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8.5 The DMZ Host Screen
In addition to the servers for specified services, NAT supports a default server IP
address. A default server receives packets from ports that are not specified in the
NAT Port Forwarding Setup screen.
Figure 86 NAT > DMZ Host
The following table describes the fields in this screen.
8.6 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. The SIP ALG translates the P-2812HNU-51c’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 you enable the SIP ALG.
Table 54 NAT > DMZ Host
LABEL DESCRIPTION
Default Server 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, the P-2812HNU-51c
discards all packets received for ports that are not specified
in the NAT Port Forwarding screen.
Apply Click Apply to save your changes back to the P-2812HNU-51c.
