The Windows firewall introduced in Windows XP SP2 and is used to this day. Some users of personal computers, not noticing the difference between firewall and antivirus (if you have a second), disabled the firewall, thinking it useless. Unfortunately, such people are very deeply mistaken. Simply put, a firewall is a means to detect and alert the user about a problem, and antivirus - tool to find malicious software on your computer and fix it. You still need to understand these concepts in more detail.
Running firewall provides blocking various incoming connections. For example, before the advent of the firewall based on Windows operating systems, the user's computer could be infected by a computer worm in a matter of minutes even under the condition that the personal computer has the antivirus. Yes, the antivirus was able to detect the problem and fix it, but malware still penetrated the system. With the release of Windows XP SP2, users no longer need to search and install a firewall. The operating system firewall may block access to various system resources in the case, if the user connected to the network. In that case, if the user is connected to the home network, it can access any data.
Naturally, the user may install on your computer original Windows firewall, but third-party. Only in this case they will inform the user about the found threat is always, at the time when the original firewall does this in the background, but in the end, the user will still receive as much benefit from the free Windows firewall and third-party.
Of course, you need to have the computer as a firewall and antivirus. At the time when the first will alert the user about most of the malicious programs from the outside (from the Internet), the second will be to eliminate them. Therefore, the presence of both programs is essential to ensure an adequate level of security on a personal computer user, but even in this case, an absolute guarantee against intrusion is impossible, because all the time there is a new malicious software.
Advice 2: What is a firewall
A firewall (or firewall) – the means by which the process of controlling access to your computer through the Internet. There are two types of firewalls: software and hardware.
With the help of a firewall it is possible to provide computer security: hackers, malware penetration becomes impossible. Another plus is that the firewall does not allow attackers to use your computer for their purposes, for example, to attack the computers of other users. Particular importance of application firewalls notes on those computers that have a permanent connection to the Internet.In the Microsoft Windows operating system has a built-in firewall software. To start it, just select "start" –> "control Panel" –> "Firewall Windows". The use of standard firewall capable of providing protection from the above threats. Use the tips operating system to configure it. Customization is done by setting specific rules and restrictions for specific programs, ports, services, etc. may Also be used by other software firewalls. They can vary to provide the user the possibilities, deeper and more fine-tuning, interface. Examples of software firewalls can serve as NetworkShield Firewall, Avira Internet Security, BitDefender Internet Security, etc. Most hardware firewalls are connected between your computer and the modem (or other device capable of connecting to the Internet). Access to hardware firewall using a web browser. In address bar enter IP address of the hardware firewall, then open its settings page. We should also mention that many routers have built-in firewall. As examples of hardware solutions can be SonicWall, Cisco PIX, etc., you Must know that the firewall can communicate with any network programs that are installed on the computer. This can lead to certain problems in the operation of the software. Possible to solve the problem through more accurate your firewall settings. Also, this incompatibility can be caused by outdated software – the upgrade is often the solution.