ZyXEL Communications MAX-306, User Manual, Page: 125 / 405

User’s Guide
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The NAT Configuration Screens
10.1 Overview
Use these screens to configure port forwarding and trigger ports for the WiMAX
Device. You can also enable and disable SIP, FTP, and H.323 ALG.
Network Address Translation (NAT) maps a host’s IP address within one network
to a different IP address in another network. For example, you can use a NAT
router to map one IP address from your ISP to multiple private IP addresses for
the devices in your home network.
10.1.1 What You Can Do in This Chapter
• The General screen ( Section 10.2 on page 125 ) lets you enable or disable NAT
and to allocate memory for NAT and firewall rules.
• The Port Forwarding screen ( Section 10.3 on page 126 ) lets you look at the
current port-forwarding rules in the WiMAX Device, and to enable, disable,
activate, and deactivate each one.
• The Trigger Port screen ( Section 10.4 on page 130 ) lets you maintain trigger
port forwarding rules for the WiMAX Device.
• The ALG screen ( Section 10.5 on page 132 ) lets you enable and disable SIP
(VoIP), FTP (file transfer), and H.323 (audio-visual) ALG in the WiMAX Device.
10.2 General
Click ADVANCED > NAT Configuration > General to enable or disable NAT and
to allocate memory for NAT and firewall rules.
Figure 57 ADVANCED > NAT Configuration > General