The Alg Screen; Technical Reference; Nat Definitions - ZyXEL Communications LTE7410 User Manual

Table 18 Network Setting > NAT > DMZ
LABEL
Apply
Cancel

8.5 The ALG Screen

Click Network Setting > NAT > ALG to open the ALG screen. Use this screen to enable and
disable the NAT Application Layer Gateway (ALG) in the LTE Device.
The SIP ALG allows SIP calls to pass through NAT by examining and translating IP addresses
embedded in the data stream. When the LTE Device registers with the SIP register server, the SIP
ALG translates the LTE 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.
Figure 45 Network Setting > NAT > ALG
The following table describes the fields in this screen.
Table 19 Network Setting > NAT > ALG
LABEL
ALG
Apply
Cancel

8.6 Technical Reference

This section provides some technical background information about the topics covered in this
chapter.

8.6.1 NAT Definitions

Inside/outside denotes where a host is located relative to the LTE Device, for example, the
computers of your subscribers are the inside hosts, while the web servers on the Internet are the
outside hosts.
Global/local denotes the IP address of a host in a packet as the packet traverses a router, for
example, the local address refers to the IP address of a host when the packet is in the local
Chapter 8 Network Address Translation (NAT)
DESCRIPTION
Click this to save your changes back to the LTE Device.
Click Cancel to restore your previously saved settings.
DESCRIPTION
Enable this to make sure SIP (VoIP) works correctly with port-forwarding.
Click this to save your changes back to the LTE Device.
Click Cancel to restore your previously saved settings.
LTE7410 User's Guide
61