User manual

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ENABLE NAT
If the LAN is configured with a private IP address, the user should select this
checkbox ;. The NAT submenu will appear in the Advanced Setup menu after
reboot. On the other hand, if a private IP address is not used on the LAN side (i.e.
the LAN side is using a public IP), this checkbox ; should not be selected, so as to
free up system resources for improved performance.
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
If this checkbox ; is selected, the Security submenu will be displayed on the
Advanced Setup menu after reboot. If firewall is not necessary, this checkbox ;
should not be selected so as to free up system resources for better performance.
ENABLE IGMP MULTICAST
Tick the checkbox ; to enable Internet Group Membership Protocol (IGMP)
multicast. IGMP is a protocol used by IP hosts to report their multicast group
memberships to any neighboring multicast routers.