Alg - ZyXEL Communications LTE Series User Manual

can initiate connections to devices on the DMZ but not to those on the LAN.
You can put public servers, such as email, web, and FTP servers, on the DMZ to provide services on both
the WAN and LAN. To use this feature, you first need to assign a DMZ host. Click Network Setting > NAT >
DMZ to open the DMZ screen.
Note: Use an IPv4 address for the DMZ server.
Note: Enter the IP address of the default server in the Default Server Address field, and click
Apply to activate the DMZ host. Otherwise, clear the IP address in the Default Server
Address field, and click Apply to deactivate the DMZ host.
Figure 127 Network Setting > NAT > DMZ
The following table describes the fields in this screen.
Table 56 Network Setting > NAT > DMZ
LABEL
Default Server
Address
Apply
Cancel

10.5 ALG

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 Zyxel Device.
Application Layer Gateway (ALG) allows certain applications such as File Transfer Protocol (FTP), Session
Initiation Protocol (SIP), or file transfer in Instant Messaging (IM) applications to pass through the Zyxel
Device.
Chapter 10 Network Address Translation (NAT)
DESCRIPTION
Enter the IP address of the default server which receives packets from ports that are not
specified in the Port Forwarding screen.
Note: If you do not assign a default server, the Zyxel Device discards all packets
received for ports not specified in the virtual server configuration.
Click this to save your changes back to the Zyxel Device.
Click Cancel to restore your previously saved settings.
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