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Reference Manual for the ProSafe Dual Band Wireless VPN Firewall FWAG114
5-6
Firewall Protection and Content Filtering
 
Inbound Rule Example: Allowing Videoconference from Restricted Addresses
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 
, 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 5-4:  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 Dyamic DNS feature in the 
Advanced menus so that external users can always find your network.
If the IP address of the local server PC is assigned by DHCP, it may change when the PC is 
rebooted. To avoid this, use the Reserved IP address feature in the LAN IP menu to keep the 
PC’s IP address constant.
Local PCs must access the local server using the PCs’ local LAN address (192.168.0.99 in this 
example). Attempts by local PCs to access the server using the external WAN IP address will 
fail.