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DG834N RangeMax
TM
 NEXT Wireless ADSL2+ Modem Router Reference Manual
3-8
Protecting Your Network
v1.0, May 2005
Single address: Enter the required address in the Start field. 
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 that matches the parameters and action will be logged.
Not match: Traffic of this type that does not match the parameters and action will be 
logged.
Inbound Rule Example: Allowing Video conferencing
If you want to allow incoming video conferencing 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 
, 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.
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 menu 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.
Figure 3-6