Garmin HM210DP/DI manual Adding NAT Rules, The NAPT Rule

Configuring NAT

8.5Adding NAT Rules

This section explains how to create rules for the various NAT flavors.

8.5.1The NAPT Rule

The NAT flavor NAPT was used in your default configuration. The NAPT flavor translates all LAN-side private source IP addresses to a single public IP address. It also translates the source port numbers to port numbers that are defined on the NAT Global Configuration page.

To create a NAPT rule, proceed as follows:

1.Select Services > NAT > NAT Rule Entry > Add. The NAT Rule – Add page appears:

2.In the ”Rule Flavor:” dropdown list, select NAPT.

3.In the “Rule ID:” field, enter an ID for the rule.

The Rule ID determines the order in which the rules are invoked (the lowest numbered rule is invoked first, and so on). In some case, two or more rules may be fined to act on the same set of IP addresses. Once a data packet matches a rule, the data is acted upon according to that rule and is not subjected to higher-numbered rules.

4.From the “IF Name:” dropdown list, select the interface on the HM210dp/di to which this rule applies.

Typically, NAT rules apply to communication between your LAN and the Internet. Because the device uses the WAN interface (named ppp-0 or eoa-0) to connect your LAN to your ISP, it is the usual IF Name selection.

EN/LZT 108 6492 R2 - October 2003 59