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Adding NAT Rules
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Figure 22. NAT Rule - Add Page (NAPT Flavor)
4. Enter a [Rule ID]. The Rule ID determines the order in which
rules are invoked (the lowest numbered rule is invoked first,
and so on). If you define two or more rules that act on the
same set of IP addresses, be sure to assign the Rule ID
so that the higher priority rules are invoked first.
It is recommended that you specify Rule IDs as multiples of 5
or 10 so that, in the future, you can insert a rule between two
existing rules.
Once a data packet matches a rule, the data is acted upon
according to that rule and is not subjected to
higher-numbered rules.
5. From the [IF Name:] drop-down list, select the interface on the
device to which this rule applies. Typically, NAT rules are used
for communication between your LAN and the Internet.
Because the device uses the WAN interface (which may be
named [ppp-0], [eoa-0], or [ipoa-0]) to connect your LAN to
your ISP, it is the usual IF Name selection.