User`s guide

MBR W40 – Admin’s Manual
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Figure 78: Resolving
8. Click the Refresh button to update the status if necessary. If the site is successfully located then Active will
appear in the status bar.
Figure 79: Active Status
Note: If the site wasn’t successfully located, Hostname Resolution Failed will appear. When the W40 fails to locate
the Website, do the following:
Use a Web browser to verify that the Website is available. If it is, then you probably entered the Website address
incorrectly. If the Website is not available, then return to the Website Restrictions screen at a later time and click
the Resolve Now button to verify that the Website can be found and blocked by MBR.
You may edit the Website restriction by modifying its entry under the Local Host column in the Website Restrictions
screen.
 To modify an rule:
1. Click the action icon for the restriction. The Restricted Website screen appears (see Figure 77).
2. Modify the Website address, group or schedule as necessary.
3. Click the OK button to save your changes and return to the Website Restrictions screen.
4. To ensure that all current IP addresses corresponding to the restricted Websites are blocked, click the
Resolve Now button. The W40 will check each of the restricted Website addresses and ensure that all IP
addresses at which this Website can be found are included in the IP addresses column.
You can disable a restriction in order to make a Website available again without having to remove it from the
Website Restrictions screen. This may be useful if you wish to make the Website available only temporarily and
plan to block it again in the future.
 To modify an entry:
1. Clear the check box next to the service name.
2. To reinstate it at a later time, simply reselect the check box.
 To modify an rule:
Click the action icon for the service. The service will be permanently removed.
3.7.3.8 Network Address Translation (NAT)
The W40 features a configurable Network Address Translation (NAT) and Network Address Port Translation (NAPT)
mechanism, allowing you to control the network addresses and ports of packets routed through your gateway. When
enabling multiple computers on your network to access the Internet using a fixed number of public IP addresses, you
can statically define which LAN IP address will be translated to which NAT IP address and/or ports.
By default, the W40 operates in NAPT routing mode (refer to Section 3.7.3.8.1 Using NAT/NAPT.) However, you can
control your network translation by defining static NAT/NAPT rules. Such rules map LAN computers to NAT IP
addresses. The NAT/NAPT mechanism is useful for managing Internet usage in your LAN and for complying with
various application demands. For example, you can assign your primary LAN computer with a single NAT IP address, in
order to assure its permanent connection to the Internet. Another example is when an application server with which