Most of the people around the world think that Turning on
the firewall will protect their PC and they are secure, sorry but you are not.
See the original face of firewall here
Greet to my
readers!
It seems obvious
statements that firewall is responsible for monitoring your network traffic on
your PC and doesn’t allow those insecure program or virus to attack on your
PC.
But the truth is
different from this upper layer statement. Let me get to the point
Concept of data exchange in network
Every data which
exchanges in the devices from the network require a special door to enter into
devices for interacting to user. These doors are often called ports. Once I was
searching about the ports, I found there exist more than 65,000 Port, these
post are defined for separating the different types of data as per the
destination and its usage. Common ports are HTTP having port number 80; HTTPS
having port number 443 and all.
How Firewall Plays role in controlling network
Firewall is having
role here, firewall actually monitors the port, and Firewall let the specific
program/port allow or disallow to communicate over the network. You can set up advance firewall setting to
control these ports and maximize the feeling that you are safe.
Then why firewall fails to protect your PC
A robust and
advanced set up of firewall can block/shut down almost all the other port and
only allow the data to communicate through the verified ports like 80. This HTTP
port let you browse the internet. If you block this port, you will not able to
surf the web at all. That means your web connectivity is almost killed. And
this is what firewall’s biggest failure lies. If the attacker is little expert
(they always are), they’ll plan easily to get into your system by this one open
port.
These attacks are
of Two types
Cross-site scripting
One of the most common
types of attack can be caused by cross-site scripting. This involves the embedding
the java script file in pop ups and advertising. Also simple HTML code to take
the input from user and also these java script files can scan the user’s local
cookies and send the data to attackers. These data when goes in the hand of
attacker, they will be easily able to monitor the user’s activity, even steal
the passwords
Port independent attacks
Attacking through
ports that were by mistake left open by user is not the only one way to attack
on PC. There are lots of another method to inject these virus in your system
via E-mail attachments, non secure download of virus and worms external drives
and other internet downloads. These miscellaneous code can configure firewall
internally, to communicate to destination/attackers with secrete port without
giving any clue to Administrator.
How to overcome firewall’s weak protection
One of the most
common solutions is to turn off the Java script on the Web pages via Browser
settings, but turning off the Java script will cause most of the websites not
to function properly.
Also website owners
has to step ahead to protect their site from these miscellaneous content on
their pages in any form, especially on flashes and plug-ins. You can Block unwanted plug-ins here. Else you don’t have any other option rather than trust
those websites.
Another method is
to use the updated browsers and choosing the smart browsers like Google chrome
and Mozilla Firefox.
With Updated
anti-virus to scan every downloaded data and scanning removable media carefully
can protect you up-to a certain limit.
Keep checking your
firewall’s ports and analyze it. Block these firewall rules if you think it is insecure.
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