ZyXEL Communications LTE3316-M604, User Manual

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Chapter 11 NAT
LTE3316 Series User’s Guide
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• Use the Port Trigger screen to change your Zyxel Device’s trigger port settings ( Section 11.4 on page
100 ).
• Use the ALG screen to enable or disable SIP (VoIP) ALG (Application Layer Gateway) in the Zyxel
Device ( Section 11.5 on page 101 ).
11.2 General Settings
Use this screen to enable NAT and set a default server. Click Configuration > Network > NAT to open the
General screen.
Figure 48 Configuration > Network > NAT > General
The following table describes the labels in this screen.
11.3 Port Forwarding
Use this screen to forward incoming service requests to the server(s) on your local network and set a
default server. You may enter a single port number or a range of port numbers to be forwarded, and the
local IP address of the desired server. The port number identifies a service; for example, web service is on
Table 34 Configuration > Network > NAT > General
LABEL DESCRIPTION
Network Address
Translation (NAT) Network Address Translation (NAT) allows the translation of an Internet protocol address
used within one network (for example a private IP address used in a local network) to a
different IP address known within another network (for example a public IP address used on
the Internet).
Select Enable to activate NAT. Select Disable to turn it off.
NAT Loopback NAT loopback allows local users to use a domain name to access a server on the local
network. A packet sent to the public (WAN) IP address is always forwarded to the default
gateway (the Zyxel Device). With NAT loopback enabled, the Zyxel Device uses the WAN
interface’s IP address as the packet’s source address and treats the packet as if it came
from the WAN interface. The packet then can be forwarded to the local server according
to the port forwarding rule.
Select Enable to activate NAT loopback. Select Disable to turn it off.
Cancel Click Cancel to begin configuring this screen afresh.
Apply Click Apply to save your changes back to the Zyxel Device.