NL1901ACV Enhanced Hybrid 4G LTE Gateway – User Guide
UG01063 v. 1.0 December 2018
Figure 57 – NAT – DMZ Host settings
Note that Enable LAN Loopback can also be selected.
LAN Loopback allows the LAN host to access another LAN host/server via the external IP Address of the gateway.
Without NAT loopback you must use the internal IP address of the device when on the LAN side.
ALG
The Application Layer Gateway (ALG) is a feature which enables the gateway to parse application layer packets and
support address and port translation for certain protocols. We recommend that you leave these protocols enabled
unless you have a specific reason for disabling them.
Figure 58 – NAT – Application Layer Gateway (ALG) settings
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