Network security: Process in which digital information are protected

slurpslapoutNetworking and Communications

Nov 20, 2013 (3 years and 8 months ago)

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Network security



Process in which digital information are protected

What is network security ?

-
Controlling access to network

-
Securing any network interference

-
Securing possible entry point of attack

-
Stop unauthorized user (“intruders”)from
accessing any part of system

-
Detect whether or not someone
attempted to break into your
network system



What is at risk


Confidentiality
-
information should be
available only to those who rightfully have
access to it


Integrity
-
information should be modified
only by those who are authorized to do so


Availability
-
information should be
accessible to those who need it when they
need it


How can we secure network



There is no full way to secure networks
but you could make hard for someone to
penetrate the network by installing firewall


What is a Firewall


-
System or group of systems that enforce an
access control policy between two network


-
Firewall is piece of software or hardware that
filters all traffic network between computer,home
network, or office network and internet


-
System that protects a network and the
machines from various type of attacks



Primary goal of firewall


Implement a desired security policy


Controlling and blocking unwanted
incoming traffic


Block network traffic based on content


What can’t firewall prevent


Inside attack (internal network snooping or
intrusion attempts from within)


Social engineering (attack in which one
obtain information< IP address or pass
word> pretending to be coworker or just
someone who doing routing checks


Poorly trained firewall administer


Firewall


If you have more than one firewall
installed on your computer, you should not
have both firewalls turned on at the same
time. Two firewalls turned on at the same
time can cause compatibility problems that
result in some programs not working
correctly.


Hardware firewall


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Free firewall


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R
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http://www.r
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To open Windows Firewall



1.Click Start and then click Control
Panel.


2.In the control panel, click Windows
Security Center.


3.Click Windows Firewall.

Windows firewall


Dose
-
>Help block
computer viruses and
worms



Ask for your
permission to block or
unblock certain
connection requests.


Create a record (a
security log), if you
want one


Does not
-
>Detect or
disable computer
viruses and worms

if
they are already on your
computer


Stop you from opening
e
-
mail with dangerous
attachments
.


Block spam or unsolicited
e
-
mail from appearing in
your inbox.