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Chapter 5 Configuring Security Settings
Firewall
Selecting Firewall in the Security screen generates the “Firewall Settings” screen.
Select the level of security needed for the network.
☞ Note: If VPN connections need to made through the Modem,
the Firewall must be set to Off. No VPN connections can be
made if the Firewall setting is at Custom, High, Medium,
or Low. Also note that DMZ hosting, Port Forwarding, and
Application Level Modem settings are active only when the
Firewall is Off.
Custom
If Custom is selected in the “Firewall Security Level” screen, the user can select which
of the services listed in the window can pass through the firewall (both in and outthe
services listed at the bottom of the screen. Remember that checking a box opens the
service; a blank check box indicates that the service is blocked. Only experienced net-
work administrators should select and use the Custom Firewall option.