What is a Firewall?

When we were only using Internet for chat, download and check the mail, the possibilities that someone are set in us as an attack target were practically nil, which companies were a lot better and interesting target to attack. However, we started to use the Internet to pay with credit card services and shopping, we got important files on storage services online and create a number of files in the cloud, i.e. which tasks we can do with the Internet have been expanded, and with this, the need to take care of us.

All of this means that while we use computers, more likely to be attacked by cyber criminals have, so simple and unfortunate as that. This is because with every day that passes, we use our Internet connection for most things, expanding the danger to many more scenarios of which we did not have to worry about us.

Fortunately, there is a tool that allows us to have a very significant degree of security, and although its performance is quite transparent, which means that most of the time the user has nothing to do to make it work, is practically the last line of Defense. This tool is called Firewall, and in this article we will know its working.

What is and how it works a firewall?

A Firewall, also known as a “firewall”, is basically a security system included in all operating systems, but which however can also be obtained from another manufacturer, i.e. third party developers, and allows us to block or allow connections entering or leaving our computer manually or automatically. For more, visit this website.

Is it possible this? The Firewall acts by filtering packets, basic units in Internet traffic, that circulate through our connection or network. East packet filtering can be done both at the level of hardware, software, or a combination of both.

It is to say that a firewall we will be in a position to check all the connections that are established with our PC, in the way that we like best and in the moment in which may seem appropriate.

That is why a Firewall system offers a set of rules that can be defined to create our own custom security environment. These rules are:

Allow: It authorizes the connection

Deny: The connection is blocked

Ending

While it is true that a properly configured firewall can be an instrument of security very stable and extremely necessary at these time that run, however under no circumstances should be considered as sufficient.

A firewall should be complemented with a good antivirus updated, but above all things, a good dose of common sense.

 

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