What is Firewall?
By Prempal Singh
A firewall is a filter that protects your computer from unauthorized intrusions and ensures the security of using the Internet.
Firewall is a software product or software and hardware complex that controls network packets or installed programs. Needed to protect the system from computer attacks. A firewall can also be called a, firewall, or firewall.
On computers with modern operating systems comes as embedded software. Also, the firewall may be included in the paid anti-virus systems. On the phones, by default, there is no firewall and it needs to be installed by regular means.
Software implementations for Windows – built-in firewall (can be opened in the control panel or from the Network and sharing center), individual programs, antivirus systems with a network screen included in the composition. On Linux, most often, it is introduced into the kernel of Netfilter, which is managed using various utilities, for example,