A computer firewall is software or hardware that protects your computer from viruses, hackers, and other malicious programs. A firewall is the best and most important step to protect your computer, whether you’re a small business user or a home user. A firewall will not protect your computer from all threats. A firewall is the best first line of defense. Windows computers can be attacked with many different methods, not only viruses, worms or Trojan horses. A popular method of attacking a Windows computer is to try to communicate with it via any of the network ports found on Windows computers. These ports can be compared to radio frequencies or TV channels. Computers are set up so they can listen for messages from other computers. This is how they communicate.
How a computer firewall works
Firewalls monitor all communication between your computer’s computer and the Internet. The computer firewall can determine what types of communication are allowed to flow in or out. This is because they have an “access control listing” which lists rules that define exactly what communications can be allowed and blocked. Computer firewalls designed for consumers are often preconfigured to provide maximum protection straight out of the box. They are highly susceptible to being attacked by any computer connected to the Internet because they require communication to be established between two computers on a home network. A computer firewall can be either a device attached to your network or a program on your computer. It will block any unwanted communication from the Internet while allowing you to communicate legitimately with your computer.
Types of computer firewall
There are two main types of computer firewalls: software and hardware. A hardware firewall connects to the network so that all communications between computers and the Internet must pass through it. The firewall can then be examined to determine if they should be allowed or blocked. A software firewall, which runs on a computer, performs the same examination of network communications as a hardware firewall. A hardware firewall protects all computers in a network; a software firewall protects only the computer where it is being used.
What You Need to Know
Multiple software firewalls are unnecessary for most home computers, small-business networking and home networking. Two firewalls running on the same connection can cause problems with connectivity or other unanticipated behavior. Your computer can be protected by one firewall, regardless of whether it’s the Windows XP Internet Connection Firewall, or another software firewall. Hackers can gain access your personal information if your computer isn’t protected when you connect to Internet. Hackers can place code on your computer to cause malfunctions or files destruction. They may also be able to use your computer to cause issues on other computers in your home or business that are connected to the Internet. Firewalls are used to block malicious Internet traffic from reaching your computer. Firewalls can also be used to stop other people using your computer to attack your computers. It doesn’t matter if you connect to the Internet via a dial-up, cable, or digital subscriber line (DSL, ADSL), a firewall is essential. It is a good idea to activate the Windows Internet Connection Firewall on all computers within your home network. If a computer becomes infected, this will prevent it from spreading viruses and worms throughout your network. An infected computer could spread to others on the network via an additional Internet connection. This includes a laptop connected to your home network or public network. A virus can also be spread to computers on the network via e-mail, software downloaded from a CD or other floppy disks, or through e-mail.