Billion BiPAC 5200N RC, User Manual

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select for this connection.
4.3.5 Firewall
Your router includes a firewall for controlling Internet access from your LAN and helping to
prevent attacks from hackers. In addition to this, when using NAT (Network Address
Translation) the router acts as a “natural” Internet firewall, since all PCs on your LAN use
private IP addresses that cannot be directly accessed from the Internet.
Firewall: Enabled: As set in default setting, it activates your firewall function.
Disabled: It disables the firewall function.
SPI: Enabled: As set in default setting, it activates your SPI function.
Disabled: It disables the SPI function.