The Firewall Menu
The User Interface enables customers to enable a firewall and configure its rules. If they use the firewall, they must configure it properly for maximum protection. They should be aware that even an optimally configured firewall cannot be guaranteed to keep out all potentially harmful traffic.
A discussion of the principles applied when setting up a firewall is in the DW4020 User Guide (HNS
Note: It is important to remember that the firewall checks inbound packets only. If you want to check outbound packets, you must obtain another firewall and install it on the network or on selected hosts on the network.
The Settings Menu The firewall allows configuration of up to 10 rules for blocking packets received over the satellite link. Five port numbers or 5 protocol types in each rule. Which Source IP Addresses are examined for each rule can also be specified. The table below lists some common port numbers and protocols.
1.Open the User Interface and go to Home→Firewall→Settings. The screen in Figure 41 appears.
2.Select the Enable Firewall checkbox to enable the firewall.
3.Determine which rule number you want to create or modify.
4.Select a rule type.
5.Select a port or protocol number.
6.Type the source IP address that you want the firewall to check for.
7.You can leave the subnet mask set at 255.255.255.255. Set the Subnet Mask to 0.0.0.0 if you would like to block access from everywhere in a particular rule.
8.Click on the Save Configurations button to save the firewall settings.
Chapter 3 • The User Interface
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