User guide

NAT Configuration
44 (98) EN/LZT 108 6492 R1
April 2003
8.5.1 The 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.
1 Select Services > NAT > NAT Rule Entry > Add.
Figure 36: Nat Rule NAPT - Add
2 In the "Rule Flavor" drop-down list, select NAPT.
3 In the "Rule ID" field, type 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 cases, two or more rules may
be defined 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" drop-down 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.
5 In the Local Address From/To fields, type the starting and ending IP addresses,
respectively, of the range of private addresses you want to be translated. Or, type
the same address in both fields to specify a single IP address.
If all LAN IP addresses should be translated, specify 0.0.0.0 and 255.255.255.255
respectively.
6 In the Global Address field, typethe address that you want to serve as the
publicly known address for the LAN computer.
7 When you have completed entering all information, click the Submit button. A
page appears to confirm the change.
8 Click Close to return to the NAT Configuration page. The new rule should now
be displayed in the NAT Rule table.
9 On the NAT Configuration page, ensure that the Enable radio button is selected.