Netgear FVS318v3 – Cable/DSL ProSafe VPN Firewall with 8-Port Switch Reference Manual
ProSafe VPN Firewall FVS318v3 Reference Manual
Firewall Protection and Content Filtering
3-7
v5.0, January 2012
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.
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 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.
rebooted. To avoid this, use the Reserved IP address feature in the LAN IP menu to keep the
PC’s IP address constant.
•
Each local PC must access the local server using the PC’s local LAN address (192.168.0.11 in
the example in
the example in
). Attempts by local PCs to access the server using the external WAN
IP address will fail.
Outbound Rules (Service Blocking)
The FVS318v3 allows you to block the use of certain Internet services by PCs on your network.
This is called service blocking or port filtering. You can define an outbound rule to block Internet
access from a local PC based on:
•
This is called service blocking or port filtering. You can define an outbound rule to block Internet
access from a local PC based on:
•
IP address of the local PC (source address)
•
IP address of the Internet site being contacted (destination address)
•
Time of day
•
Type of service being requested (service port number)
Figure 3-4