FireWalls

INTRODUCTION.

Firewalls are computer security system that protects ur office/home PCs or ur Network from Intruders, Hackers and Other Malicious Code.Firewalls Protects u from offensive Softwares that may come to reside  on ur systems or from prying hackers.In a day and age when online security concearnsare the top priority of the computer users.Firewalls provide you with the necessary safety and protection.

What Exactly are Firewalls

Firewalls are software program or hardware devices that filter the traffic that flows into ur pc or Network through a internet connection.They sift through the data flow or block that which they deem(based on how and & and for what u have turned the firewall) harmful to ur Network or computer system.

When connected to the internet even a stand alone pc or a Network of interconnected computers make easy targets for malicious softwares or Evil Hackers.Firewall offer the security that make u less vulnerable and also protect ur date from being compromized.

How Do They Work.

Firewalls are setup at every connection to internet.therefore Subjecting All data Flow to carefull monitoring.Firewalls can also be turned to follow rules.These Rules are Simply Security Rules, that can be setup by ur self or by the Network Administrator to allow traffic to their webservers,Ftp servers,Telnet servers there by giving the computer owner/administrator immense control over the traffic that flows in & and out of their Networks.

Rules will decide who can connect to internet,what kind of connections can be made,which or what kind of files can be transmitted in out.Basically all traffic in & out can be watched and controlled thus giving the Firewall Installer a high level of security or protection.

Firewall Logic.

Firewalls uses 3 types of filter machanisms.

Packet filtering or packet purity.

data flow consists of packets or firewall information analyze these packets to sniff out offensive and unwanted  on what you have defined as unwanted packets.

Proxy.

Firewall in this case assume the role of recipient and in turn sends it to the node that has requested the information and vice versa.

Inspection.

In this case Firewalls instead o sifting through all of the information in the packets,mark key features in all outgoing requests & check for the same mathching characteristics in the inflow to decide if it relevant information that is coming through.

Types Of Firewalls.
1.Software:
New Generation Operating systems are come with Built in Firewalls or u can buy a Firewall software for the computer that access the internet or act as a gateway to ur home Network.
2.Hardware:
Hardware Firewalls are usually Router with built in Ethernet card and hub.Your computer or computers on your Network connect to this Router & access the web.


IMPORTANT FIREWALL PRODUCTS:
Some important Products that you can check out are:
1.Mcafee Internet Security
2.Microsoft Windows Firewall
3.Norton personal Firewall
4.Trend Micro Pc.cillin
5.Zone alarm Security suite
6.Comodo Internet Security