User's Manual

Reference Manual for the Model DG834G Wireless ADSL Firewall Router
5-8 Protecting Your Network
•Log
You can select whether the traffic will be logged. The choices are:
• Never — no log entries will be made for this service.
• Always — any traffic for this service type will be logged.
• Match — traffic of this type which matches the parameters and action will be logged.
• Not match — traffic of this type which does not match the parameters and action will
be logged.
Inbound Rule Example: Allowing Videoconferencing
If you want to allow incoming videoconferencing to be initiated from a restricted range of outside
IP addresses, such as from a branch office, you can create an inbound rule. In the example shown
in Figure 5-6, CU-SeeMe connections are allowed only from a specified range of external IP
addresses. In this case, we have also specified logging of any incoming CU-SeeMe requests that
do not match the allowed parameters.
Figure 5-6: Rule example: Videoconference from Restricted Addresses
Considerations for Inbound Rules
• If your external IP address is assigned dynamically by your ISP, the IP address may change
periodically as the DHCP lease expires. Consider using the Dynamic DNS feature in the
Advanced menus so that external users can always find your network.
• If the IP address of the local server computer is assigned by DHCP, it may change when the
computer is rebooted. To avoid this, use the Reserved IP address feature in the LAN IP menu
to keep the computer’s IP address constant.