User manual

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F2.5 IP over ATM (IPoA)
STEP 1: Click Next to continue.
STEP 2: Enter the WAN IP settings provided by your ISP. Click Next to continue.
STEP 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 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.