Technical data

5.6 Firewall 106
5.6 Firewall
The firewall protects your LAN against intruders. You can choose
to activate different options.
In computing, a firewall is a piece of hardware and/or software
which functions in a networked environment to prevent some
communications forbidden by the security policy, analogous to
the function of firewalls in building construction.
A firewall monitors incoming and outgoing data traffic on the
data packet level. Each packet is checked against a set of rules
defined by the administrator. In case of a rule violation, the
corresponding packet will be blocked. When no rule has been
violated, the packet will be transmitted. This method is called a
packet filter.
Additionally a firewall can supply certain security functions for
special applications or ports protecting them against well known
attacks, e.g. a firewall can be configured for an FTP server or a
web server.
For maximum protection activate all options. Nevertheless use an
Anti-Virus software and a personal firewall. Make sure to update
these programs regularly.
VPN Passthrough
This option allows for connections of an internal VPN client to a
server in the internet. A VPN (Virtual Privat Network) enables you
to secure the entire data traffic between several computers via
encryption.
Figure 5.14: Firewall options: VPN Passthrough