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Firewall is configured to allow or deny internal/external communication (both ways, in
or out) through defined ports, and for defined software applications. For example, the
firewall could be configured to only permit web data to flow in and out using Microsoft
Explorer. Any attempt to transmit web data by any other browser would be blocked.
Firewall protects your personally-identifiable information from being sent from your
computer without your permission. It controls how your computer exchanges data with
other computers on the Internet or local network. Within an organization, the firewall
also protects the single computer from attacks initiated by internal users on other
computers in the network.
Recommendation:
Generally it is not recommended to use more than one firewall on
an individual computer. The security of the computer is not enhanced if you install
more firewalls. It is more probable that some conflicts between these two
applications will occur. Therefore we recommend that you use only one firewall on
your computer and deactivate all others, thus eliminating the risk of possible conflict
and any problems related to this.
8.7.1. Firewall Principles
In AVG, the
Firewall
component controls all traffic on every network port of your
computer. Based on the defined rules, the
Firewall
evaluates applications that are
either running on your computer (and want to connect to the Internet/local network),
or applications that approach your computer from outside trying to connect to your
PC. For each of these applications the
Firewall
then either allows or forbids the
communication on the network ports. By default, if the application is unknown (i.e. has
no defined
Firewall
rules), the
Firewall
will ask you if you wish to allow or block the
communication attempt.
Note:
AVG Firewall is not intended for server platforms!
What AVG Firewall can do:
·
Allow or block communication attempts of known
applications
automatically, or
ask you for confirmation
·
Use complete
profiles
with predefined rules, according to your needs
·
Switch profiles
automatically when connecting to various networks, or using
various network adapters
8.7.2. Firewall Profiles
The
Firewall
allows you to define specific security rules based on whether your
computer is located in a domain, or it is a standalone computer, or even a notebook.
Each of these options requires a different level of protection, and the levels are
covered by the respective profiles. In short, a
Firewall
profile is a specific
configuration of
Firewall
component, and you can use a number of such predefined
configurations.
