Few of us leave deliberately the door of the car open or do not lock the door to the apartment. But most users do not care about the security of their computers and thus provide unimpeded entry of different kinds of hackers.

To protect against hackers and other attacks, most users need assistance and they will have this assistance with so-called firewall. A firewall can be hardware or software, and acts as a caretaker of the computer. It monitors all incoming and outgoing Internet traffic.

The firewall scans all traffic for viruses of any kind:
- Spyware (spyware);
- Malicious software.

A firewall can monitor Internet traffic in two ways:
- Packet filtering;
- Verification regime.

Package information is a piece of data that contains the address of the sender and the recipient’s address. This address is called IP. But what is the IP-address? It acts as a determinant for your computer. IP-address is 4-byte (32-bit) number that specifies the unique number of the user’s computer on the Internet. If your firewall authenticates the data packet and the IP-address, it allows these data to “get”.

The verification regime. This method is based on the fact that some of the data is checked in the package and compared with the greater part of the famous and information security, if everything is safe, the data is fed to a computer, if not, the entrance to them is blocked. This method is preferable because the information is checked before getting on the computer.

Firewall – hardware.

Why do we need hardware that performs the functions of a firewall, if there are the programs for this purpose? These devices have one huge advantage – if they use a computer does not waste system resources to support the firewall.

Thus, the CPU is less loaded and can use these resources for other purposes. CPU or central processor must be relieved of the tasks on order to the computer works as fast as possible.

Firewall – software.

There are many ways to gain access to someone else’s computer, of course, if it is not protected. If your computer is left without protection, many people can get access to it; steal passwords or other valuable information, run programs without your knowledge. A firewall protects your computer from the following:

1. Mailbombs.

Someone sends hundreds and even thousands of copies of the same letter on the mailbox, so long as the e-mail is not completely filled. If you use the Internet for a long time, then perhaps you have experienced it. A firewall can prevent it.

2. Viruses.

Undoubtedly, the virus is a threat number one. Viruses can cause much harm, for example, to format the hard drive, which will lead to data loss. Some firewalls do not provide protection against viruses. In this case, as an additional protection it is worth to buy an antivirus program. After you install the firewall it must be configured. To configure it, open the certificate program. Once you set it up, take a minute of your time and check its work. To do this, please visit Security.

You will feel more comfortable with a firewall knowing that your PC is protected, and no one can steal your personal information, credit card number or password on your account.

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And it is very important that you follow a final piece of advice – today the online technologies give you a truly unique chance to choose what you need at the best terms which are available on the market. Funny, but most of the people don’t use this opportunity. In real practice it means that you should use all the tools of today to get any info that you need.

Search Google or other search engines. Visit social networks and check the accounts that are relevant to your topic. Go to the niche forums and join the online discussion. All this will help you to create a true vision of this market. Thus, giving you a real opportunity to make a smart and nicely balanced decision.

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