User manual

32
Step 5: Click Next to display the following screen.
Enable NAT checkbox: If the LAN is configured with a private IP address, the user
should select this checkbox. The NAT submenu on the left side main panel will be
displayed after reboot. The user can then configure NAT-related features after the
system comes up. If a private IP address is not used on the LAN side, this checkbox
should be de-selected to free up system resources for better performance. When
the system comes back after reboot, the NAT submenu will not be displayed on the
left main panel.
Enable Fullcone NAT: This option becomes available when NAT is enabled.
Known as one-to-one NAT, all requests from the same internal IP address and port
are mapped to the same external IP address and port. An external host can send a
packet to the internal host, by sending a packet to the mapped external address.
Enable Firewall checkbox: If the firewall checkbox is selected, the Security
submenu on the left side main panel will be displayed after system reboot. The
user can then configure firewall features after the system comes up. If firewall is
not used, this checkbox should be de-selected to free up system resources for better
performance. When system comes back after reboot, the Security submenu will
not be displayed on the left main panel.