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Configuring Network Address Translation
70
Adding NAT Rules
This section explains how to create rules for each NAT flavor.
Note:
You cannot edit existing NAT rules. To change a rule
setup, delete it and add a new rule with the modified
settings.
The NAPT rule: Translating between private
and public IP addresses
Follow these instructions to create a rule for translating the
private IP addresses on your LAN to your public IP addresses.
This type of rule uses the NAT flavor NAPT, which was used
in your default configuration. The NAPT flavor translates private
source IP addresses to a single public IP address. The NAPT
rule also translates the source port numbers to port numbers
that are defined on the [NAT Global Configuration] page.
1. Click the [NAT] tab, then select [NAT Rule Entry] from the
[NAT Options] drop-down list. The [NAT Rule Entry] page
displays a row for each currently configured NAT rule.
2. Click [Add] to display the [NAT Rule – Add] page.
3. From the [Rule Flavor:] drop-down list, select [NAPT]. The
page reappears with only those fields that are appropriate
for the NAPT rule flavor, as shown in Figure 22.