Computers and Technology

Computer firewall is a piece of software or hardware that helps screen out hackers, viruses, and worms that try to reach your computer over the Internet. If you are a home user or small-business user, using a firewall is the most effective and important first step you can take to help protect your computer. Firewall will not make your computer completely safe. However, a firewall provides the most effective first line of defense. Windows computers can be attacked in many ways - and not just with viruses, worms, or Trojan horses. Another popular way to attack a Windows computer is to attempt to communicate to it over any of the network "ports" found on Windows computers. These ports are kind of like TV channels or radio frequencies: Computers are set up to listen for messages that may arrive from other computers - this is how they communicate with one another.

How computer firewall works

Firewalls monitor all the communication between your computer and the Internet. computer firewall knows what kind of communication are allowed to flow in and out. They know this because they have something called an "access control list" - a list of rules that specify precisely what kinds of communications are allowed and what kinds are blocked. The computer firewalls made for the consumer market are usually preconfigured to offer maximum protection right out of the box. The configuration required to facilitate communication between two computers in a home network makes them highly vulnerable to attack from any computer on the Internet. Whether the firewall is a hardware device connected to your network, or a software program in your computer, a computer firewall will automatically block all unwanted network communication from the Internet, while at the same time permitting any legitimate communication that you need to use your computer.

Type of computer firewall

There are two principal types of computer firewall: hardware and software. A hardware computer firewall is a device connected to the network in such a way that all communications between any computer and the Internet must pass through the firewall and be examined to see whether they should be discarded or allowed to pass through. A software computer firewall is a program that runs on a computer and performs the same type of examination of network communications that a hardware firewall does. But where a hardware firewall can protect all of the computers on a network, a software firewall only protects the computer it is running on.

Things you need to know

Running multiple software firewalls is unnecessary for typical home computers, home networking, and small-business networking scenarios. Using two firewalls on the same connection could cause issues with connectivity to the Internet or other unexpected behavior. One firewall, whether it is the Windows XP Internet Connection Firewall or a different software firewall, can provide substantial protection for your computer. If your computer is not protected when you connect to the Internet, hackers can gain access to personal information on your computer. They can install code on your computer that destroys files or causes malfunctions. They can also use your computer to cause problems on other home and business computers connected to the Internet. A Firewall helps to screen out many kinds of malicious Internet traffic before it reaches your computer. Some firewalls can also help to prevent other people from using your computer to attack other computers without your knowledge. Using a firewall is important no matter how you connect to the Internet - with a dial-up modem, cable modem, or digital subscriber line (DSL or ADSL). So it is wise to turn on the Windows Internet Connection Firewall for all computers in your home network. This helps prevent the spread of viruses or worms across your network if a computer is infected. A computer on the network could become infected through a separate Internet connection, such as one on a laptop that is used on your home network and on public networks. Or a virus could be introduced to a computer on your network by way of e-mail or software installed from a CD or floppy disk. If you have more than one computer in a home or small-office network, you should protect every computer in the network. Turning on Windows Firewall or another firewall on every connection will help prevent the spread of a virus from one computer to another in your network if one of your computers becomes infected. However, if you open an infected e-mail attachment, the firewall won't block it and it can infect your computer. You should install an antivirus program as well.

Computers are one of the most important electronic devices in our lives. Many people work nonstop on their computers, and are often annoyed at how slow they can become at times. Luckily, there are a couple easy and free things that you can do in order to increase the speed of your computer. They will only take a few moments but can save you dozens of hours of frustration while waiting for your computer to start or load a program!

The first thing you should do when your computer is slowing down is to check it for viruses. Viruses can play all kinds of havoc with your computer. Everything from Microsoft word to your internet browser can be affected by viruses. Make sure you scan your computer for viruses at least once a week as part of your computer security efforts. If you have scanned your computer and have not found any potential viruses, check with a malware and spyware program to be sure none of those nasty programs are hiding on your computer as well. They often wreak havoc on many different parts of your computer and when removed can dramatically increase the speed of your machine.

After checking for any and all potential computer security issues, you now need to look at what is installed on this computer. If you use your computer fairly frequently, there is likely to be some programs on it that you never use. These programs may be running on startup, and taking up valuable disk space. Every program that runs on startup will slow down the boot process and cause you to feel more frustrated. Try to remove these programs using add/remove programs and you should see a dramatic increase in speed.

For more powerful users of a windows computer, you may want to check out some administrative functions. Getting a faster computer requires you to disable a lot of the stupid processes that start when the computer does. There are various websites with complete guides on which processes and tools to disable in order to increase the speed of your machine. System tools in the accessories memory of a windows xp or earlier computer will allow you to defragment your computer. You should do this every week or two in order to reduce the amount of disk space you are using as well as increase your computers speed.

Registry errors and other files can be quite the pain in your computer. Faster computers usually have very few registry errors. In order to get rid of these errors, you should use a registry tool. Make sure to only use a proven registry tool in order to fix your computers problems, as many fake registry tools will actually install spyware and cause further problems with your computer.

You do not need to have a slow computer. By following a few of these useful tips, you should see a remarkable increase in speed. Many people are just not following every step, but now that you know you are ready to have the fastest computer on the block.