Network Security
The
first step most companies take for their
physical security is simple: locked doors to keep out potential
intruders. Network security plays a similar role in computer
security, by simply keeping unauthorized personnel away from your
sensitive data. Network security also needs to address the times when
data must be transmitted outside of your company’s
secure network and should address the possibility of your
network’s outer security being compromised.
I’ll discuss two kinds of network security in this
book: boundary security
, which is a technique
that protects your network from outside attack and is intended to
protect your network from intrusion, and data
encryption
, which protects data that travels outside your
network and provides data protection within your secure network.
Boundary Security
Network security, like physical security,
starts with strong walls. Typically, those walls are provided by
firewalls
,
which prevent unauthorized data from traveling to and from your
network. Windows Server 2003 doesn’t provide the
functionality required of a firewall, although it does provide an
excellent platform for firewall products, such as
Microsoft’s Internet Security and Acceleration
Server.
There are a wide variety of firewall products on the market, including some that are built into or run on various Microsoft operating systems. Other firewalls are implemented as standalone devices. All networks should have one or more firewalls, period. Exactly which firewall ...
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