Linux or GNU (Linux), is an open source operating system kernel developed by thousands of developers and programmers around the world. This system has been able to prove the strength of all other systems and evidence of this use in a wide spectrum of platforms from giant servers to home computers and mobile phones and developed user interfaces working to support almost all languages of the world.
GNU Linux as everyone knows it is adaptable to the needs of people and even companies and international organizations. The most important features of Linux is the diversity of its distributions and many of them contain tools to help to do a specific command in a specific area, there is what is important to test hack and there are interested in servers as There are those that are interested in criminal research and others.
Today we will know about the "pfSense" distribution, a free open source firewall and web interface. Of course, this firewall contains many of the features that exist in the largest protection companies and all these features free of charge!
The biggest feature of this firewall is that there are too many diagnostic tools. Among the services offered by this distribution are services such as DHCP, DNS, VPN, Load balancing.