Specifications

Security Settings
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N150 Wireless ADSL2+ Modem Router DGN1000
Inbound Rule Example: Allowing Video Conferencing
Create an inbound rule to allow incoming video conferencing to be initiated from a restricted
range of outside IP addresses, such as from a branch office. In the following figure,
CU-SeeMe connections are allowed from a specified range of external IP addresses only. In
this case, logging of any incoming CU-SeeMe requests that do not match the allowed
settings is always allowed.
Figure 11. Allow inbound video conferencing
Considerations for Inbound Rules
• If your external IP address is assigned dynamically by your ISP, the IP address might
change periodically as the DHCP lease expires. Consider using the Dynamic DNS screen
described in Dynamic DNS on p
age 75 so that external users can always find your
network.
• If the IP address of the local server computer is assigne
d by DHCP, it might change when
the computer is rebooted. To avoid this, use the Reserved IP address feature in the LAN
IP Setup screen to keep the computer’s IP address constant.
• Local computers are required to access the local server using the computer’s local LAN
addre
ss (192.168.0.11 in the example shown in Figure 11, Allow inbound video
conferencing). Attempts by local computers to access the server using the external WAN
IP address fail.
Outbound Rules (Service Blocking)
The wireless modem router lets you block computers on your local network from using certain
Internet services. This is called service blocking or port filtering. You can define an outbound
rule to block Internet access from a local computer based on local computer, Internet site
being contacted, time of day, and type of service being requested.