In
real world a "fire wall" is a fireproof wall that is built to stop
spread of fire from one part of a building to others. In
Internet world a firewall has a similar purpose in that it stops
spread of harmful viruses and attacks from entering your home or office network. Because of
ever-increasing threats that are appearing on
Internet you no longer have to be in business to need
protection of a fire wall. In fact, every computer that is connected to
internet should have one installed. You'll be a lot happier once you know that you have protected your personal files, information, and financial data, such as credit cards and bank account numbers, from being shared with every crook on
internet.
Here are some questions that you should consider before you choose a fire wall for your PC:
1. What features do I need?
2. Do I want to be protected from viruses, Trojan horses and worms?
3. Am I at risk because I use programs that access
Internet automatically?
4. How much am I willing to spend on a firewall solution?
Here are
common features that are available in almost any software-based fire wall program:
Inbound filtering - protects unknown users or programs from accessing your PC
Outbound filtering - Protects your PC from sending information to
Internet without your permission
Application integrity verification - Verifies that any program you are running aren't sneaking around behind your back and doing things that they shouldn't be doing.