SMC Networks SMC7204BRA manual Adding NAT Rules

Configuring Network Address Translation

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 (see Viewing NAT Global Settings and Statistics on page 59). The Introduction

to NAT describes how the NAPT rule works.

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.

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