User guide

NAT Configuration
48 (98) EN/LZT 108 6492 R1
April 2003
You can use the FILTER rule if you want an address translation to occur only when
your LAN computers initiate access to specific destinations. The destinations can be
identified by their IP addresses, server type (such as FTP or Web server), or both.
Figure 39: NAT Rule FILTER - Add
1 Display the NAT Rule - Add page, select FILTER as the Rule Flavor and type a
Rule ID.
2 Select the interface and, if desired, a protocol that this rule applies to.
3 In the Local Address From/To fields, type the starting and ending IP addresses
that identify the range of private address you want to be translated. Or, type the
same address in both fields.
If you specify a range, each address will be translated in sequency to a
corresponding address in a range of global addresses (which you specify in step
4).
4 In the Global Address From/To fields, type the starting and ending address that
identify the range of public IP addresses to translate your private addresses to. Or,
type the same address in both fields (if you also specified a single address in step
3).
5 Specify a destination port (or range) if you want this rule to apply to any
outbound traffic to the types of servers identified by that port number.
6 When you have completed entering all information, click the Submit button. A
page appears to confirm the change.
7 Click Close to return to the NAT Configuration page. The new rule should now
be displayed in the NAT Rule table.