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9.1 NAT
Click on the
NAT
link to view the NAT global information table.
Network Address Translation is a method for disguising the
private IP addresses you use on your LAN as the public IP
address you use on the Internet. You define NAT rules that
specify exactly how and when to translate between public and
private IP addresses.
The NAT feature offers three sections. First, click on the
Enable
radio box, to enable the NAT feature. Then select a
NAT option from the drop down list.
The three options are: NAT Global Info, NAT Rule Entry, and
NAT translations. Each one is described below.
a) NAT
Global
Info
The table displays the idle times for several protocols; you
may change the times and then click on the
Submit
button.
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b) NAT Rule Entry
The table displays NAT route configuration. Click on the
trash can
icon to delete the current rule or click on the
Add
button to add another rule.
After you click on the
Add
button, another window will
appear.
Rule Flavor
: Select NAPT from the drop-down list.
Rule ID
:
The Rule ID determines the order in which rules
are invoked (the lowest numbered rule is invoked first, and
so on). In some cases, two or more rules may be defined to
act on the same set of IP addresses. Be sure to assign the
Rule ID so that the higher priority rules are invoked before
lower-priority rules. It is recommended that you select rule
IDs as multiples of 5 or 10 so that, in the future, you can
insert a rule between two existing rules. When a data
packet matches a rule, the data is acted upon according to
that rule and is not subjected to higher-numbered rules.
IF Name
: Select an interface name from the drop-down list.
