| What is a Firewall?The term "firewall"
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| | were being telecasted on the
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| illustrates a system that protects a
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| | websites."Spies:Spies are out to get
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| network and the machines on them from
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| | secret information. It may be difficult
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| various types of attack. Firewalls are
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| | to detect break-ins by spies since they
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| geared towards keeping the server up all
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| | will probably leave no trace if they get
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| the time and protecting the entire
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| | what they are looking for.A personal
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| network.The primary goal of a firewall is
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| | firewall, therefore, is one of the
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| to implement a desired security policy;
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| | methods you can use to deny such
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| controlling access in both directions
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| | intrusions.How Firewalls work?Firewalls
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| through the firewall, and to protect the
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| | basically work as a filter between your
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| firewall itself from compromise. It wards
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| | application and network connection. They
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| off intrusion attempts, Trojans and other
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| | act as gatekeepers and as per your
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| malicious attacks.Personal Firewalls:They
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| | settings, show a port as open or closed
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| are meant for the home user in a
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| | for communication. You can grant rights
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| networked environment. They aim to block
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| | for different applications to gain access
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| simple attacks, unlike the enterprise
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| | to the internet and also in a reverse
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| level firewalls that the corporate world
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| | manner by blocking outside applications
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| uses at the server or router end. There
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| | trying to use ports and protocols and
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| are many ways to implement a firewall,
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| | preventing attacks. Hence you can block
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| each with specific advantages and
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| | ports that you don't use or even block
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| disadvantages.Are they really
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| | common ports used by Trojans.Using
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| needed?Nowadays organizations and
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| | Firewalls you can also block protocols,
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| professionals use Internet technology to
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| | so restricting access to NetBIOS will
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| establish their online presence and
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| | prevent computers on the network from
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| showcase their products and services
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| | accessing your data. Firewalls often use
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| globally. Their endeavor is to leverage
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| | a combination of ports, protocols, and
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| digital technology to make their business
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| | application level security to give you
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| work for them.All the organizations and
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| | the desired security.Firewalls are
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| professionals are shifting from Dialup to
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| | configured to discard packets with
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| broadband and getting a fixed IP. It has
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| | particular attributes such as:Specific
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| led to an increase in security attacks,
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| | source or destination IP
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| bugs in everyday working. This does not
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| | addresses.Specific protocol typesTCP
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| mean that Dialup being anonymous dynamic
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| | flags set/clear in the packet
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| link or the firewall of the ISP network
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| | header.Choosing a firewall:Choose the
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| make you pretty safe.Now if your machine
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| | firewalls which have the ability to ward
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| was under attack, you must have wondered
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| | of all intrusion attempts, control
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| what went wrong making your system crash
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| | applications that can access the
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| suddenly. So I would rather like to say,
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| | internet, preventing the malicious
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| it's not necessary for anyone to actually
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| | scripts or controls from stealing
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| know about you or your IP address to gain
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| | information or uploading files and
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| access to your system.If you system is
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| | prevent Trojans and other backdoor agents
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| infected or prone to intrusions, then
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| | from running as servers.The purpose of
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| beyond the anonymity of your Dialup
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| | having a firewall cannot be diminished in
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| connection or a dynamic IP, your system
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| | order to gain speed. However, secure,
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| can be hacked.Types of
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| | high-performance firewalls are required
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| AttacksIntrusion:There are many ways to
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| | to remove the bottleneck when using high
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| gain unauthorized access to a system.
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| | speed Internet connections. The
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| Operating system vulnerabilities, cracked
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| | World-Wide-Web makes possible the
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| or guessed passwords are some of the more
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| | generation of enormous amounts of traffic
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| common. Once access is attained, the
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| | at the click of a mouse.Some of the good
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| intruder can send email, tamper with
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| | firewall performers available in the
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| data, or use the system privileges to
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| | market are below:BlackICE DefendereSafe
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| attack another system.Information Theft
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| | DesktopMcAfee Personal
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| and Tampering:Data theft and tampering do
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| | FirewallNeowatchNorton Personal
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| not always require that the system be
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| | FirewallPGP Desktop SecuritySygate
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| compromised. There have been many bugs
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| | Personal FirewallsTiny Personal
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| with FTP servers that allow attackers to
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| | FirewallZone AlarmZone Alarm ProMost of
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| download password files or upload Trojan
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| | these firewalls are free for personal use
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| horses.Service Attacks:Any attack that
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| | or offer a free trial period. All the
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| keeps the intended user from being able
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| | personal firewalls available can't ensure
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| to use the services provided by their
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| | 100% security for your machine. Regular
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| servers is considered a denial of service
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| | maintenance of the machine is needed for
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| attack. There are many types of denial of
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| | ensuring safety.Some of the tasks advised
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| service attacks, and unfortunately are
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| | for maintaining system not prone to
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| very difficult to defend against. "Mail
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| | intrusions:Disable file and print sharing
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| bombs" are one example in which an
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| | if you are not going to be on
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| attacker repeatedly sends large mail
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| | network.Update your antivirus signature
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| files in the attempt at filling the
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| | files regularly.Use a specialized Trojan
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| server's disk filesystem thus preventing
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| | cleaner.Regular apply security patches to
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| legitimate mail from being received.Types
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| | your software and operating system.Don't
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| of AttackersJoyrider:Not all attacks on
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| | open email attachments if you have don't
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| computer systems are malicious. Joyriders
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| | know the contents it may contain.Don't
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| are just looking for fun. Your system may
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| | allow unknown applications to access to
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| be broken into just because it was easy,
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| | the internet or to your system.Regularly
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| or to use the machine as a platform to
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| | check log files of your personal firewall
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| attack others. It may be difficult to
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| | and antivirus software.Disable ActiveX
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| detect intrusion on a system that is used
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| | and java and uninstall windows scripting
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| for this purpose. If the log files are
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| | host if not required.Turn off Macros in
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| modified, and if everything appears to be
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| | Applications like Microsoft Office and
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| working, you may never know.Vandals:A
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| | turn macro protection on.Check the open
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| vandal is malicious. They break in to
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| | ports of your system and see them against
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| delete files or crash computer systems
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| | the common list of Trojans ports to see
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| either because they don't like you, or
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| | if they are being used by some Trojan.Log
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| because they enjoy destroying things. If
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| | Off from your internet connection if not
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| a vandal breaks into your computer, you
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| | required. Being online on the internet
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| will know about it right away. Vandals
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| | for long duration gives any intruder more
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| may also steal secrets and target your
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| | and sufficient time to breach system
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| privacy."In an incident a Trojan was
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| | security.Unplug peripherals like web cam,
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| being used to operate the web cam. All
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| | microphone if they are not being used.
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| the activities being done in the house
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