Network Address Translation
(NAT) enables the users to utilize the Private IP subnet specified by
RFC1597 while still allowing the clients or servers in this network to
access or to be accessed by the global Internet. It uses a mechanism that
substitutes the source private IP address with a public IP address when
a packet leaves the private network, and restores the destination public
IP address with the private IP address when the packet enters the private
network. By default, NAT is enabled. To disable NAT, click on the Disable
radio button and press the Apply Button.
Disabling Network Address Translation (NAT) will
disable Internet Sharing. Broadband Internet sharing requires this
option to be enabled.