Asus DSL-N12HP users manual in English - Page 147

ENABLE NAT, ENABLE FULLCONE NAT, ENABLE FIREWALL, external host can send a packet to the internal host

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3. This screen provides access to NAT, Firewall and IGMP Multicast settings. Enable each by selecting the appropriate checkbox. Click Next to continue or click Back to return to the previous step. 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. 147

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147
3.
This screen provides access to NAT, Firewall and IGMP
Multicast settings. Enable each by selecting the appropriate
checkbox. Click
Next
to continue or click
Back
to return to the
previous step.
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.