"When looking for an effective, inexpensive firewall solution,
Linux firewalls do not often enter into the picture unless someone
involved in the security planning process is a Linux guru. With the
ability to easily run on that old system in the corner -- the one
that can't even load the latest version of Windows (mine runs on a
Pentium 133) -- Linux firewalls can provide many of the basic
features and functionality of their commercial counterparts, such
as NAT (network address translation) and stateful packet filtering,
at a fraction of the cost.
"Linux firewalls may not be the best solution in all situations
-- such as the main corporate gateway firewall for large
organizations -- but they work great as internal firewalls
separating network subnets and gateway firewalls for small and
medium businesses and home networks with broadband Internet
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