ZyXEL P-870MH-C1 User Guide - Page 156

The DMZ Host Screen, 8.6 The ALG Screen

Page 156 highlights

Chapter 8 Network Address Translation (NAT) 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 76 NAT > DMZ Host The following table describes the fields in this screen. Table 44 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. Apply Note: If you do not assign a Default Server, the Device discards all packets received for ports that are not specified in the NAT Port Forwarding screen. Click Apply to save your changes back to the Device. 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 Device'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. 156 P-870HN-5xb User's Guide

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Chapter 8 Network Address Translation (NAT)
P-870HN-5xb User’s Guide
156
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 76
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 Device’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 44
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 Device 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 Device.