Best Data Products DSL502E_EU - Manual (Page 47)

Best Data DSL542 ADSL Ethernet Router User’s Guide
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f Specify both a destination address (or range) and a destination port (or range) if you
want this translation rule to apply to accesses to the specified server type at the
specified IP address or network.
7. Follow steps 7-12 under "The napt rule" on page 33 to submit your changes.
The bimap rule: Performing two-way translations
Unlike the other NAT flavors, the bimap flavor performs address translations in both the
outgoing and incoming directions. Figure shows the fields used to establish a bimap rule.
Figure 29. NAT Rule – Add Page (bimap Flavor)
Follow these instructions to add a bimap rule (see steps 1-4 under "The napt rule" on page 33
for specific instructions corresponding to steps 1 and 2 below):
1. Display the NAT Rule – Add Page, select BIMAP as the Rule Flavor, and enter a
Rule ID.
2. Select the interface on which this rule will be effective.
3. In the Local Address field, type the private IP address of the computer to which you
are granting external access.
4. In the Global Address field, type the address that you want to serve as the publicly
known address for the LAN computer.
5. Follow steps 7-12 under "The napt rule" on page 33 to submit your changes.
The pass rule: Allowing specific addresses to pass through untranslated
You can create a pass rule to allow a range of IP addresses to remain untranslated when
another rule would otherwise do so.
Figure 30. NAT Rule – Add Page (pass Flavor)
The pass rule must be assigned a rule ID that is a lower number than the ID assigned to the
rule it is intended to pass. In you want a specific IP address or range of addresses to not be