User`s guide

MBR W40 – Admin’s Manual
72
This rule translates five new LAN IP addresses to two NAT IP addresses, both of which are already in use by
the second rule. W40 is therefore unable to resolve this situation and the rule's status is set to "Error". Notice
that had this rule been defined as the second rule, all three rules would be valid. This is because the NAT
address 192.168.71.15 would still be available for rule number 1. This can easily be amended: You can use the
green arrow icons to move a rule entry up or down, changing its priority relative to the other rules. Click this
rule's action icon once. All rules will now be set to "Active".
Figure 96 NAT/NAPT Rule Sets
Note: Rule number 1 now maps five LAN addresses to one NAT address. W40 subtracts all previously used NAT
addresses, requested by previous rules, from the requested NAT addresses of the current rule. The requested
range of addresses does not determine how many will be available; the number of available addresses is
determined by the previous rules configuration and order. Rules will appear as "Active" even if they only have
one usable NAT address.
Example 4: Translate the address 192.168.1.5 to 192.168.71.16 to ports 1024-1050
1. Define this NAPT rule in the same manner depicted above, with the following exception:
Select the NAPT option in the Operation section drop-down menu. The screen refreshes.
Figure 97: Add NAPT Rule
2. Add a NAPT address by selecting the User Defined option.
3. Enter 1024-1050 as the range of ports in the NAPT Ports section.
4. Click OK to save the settings. The rule is displayed in the NAT screen.