A firewall is software that prevents unauthorized access from a private network. They serve to improve the security of computers connected to a network. It acts as a “traffic barrier” on the network, as all communications must flow through the firewall. And it is in that “barrier” where the transit of the web is granted or rejected.
How a Firewall Works
Among the main features of a firewall are the following:
- A firewall causes any unauthorized user to access a computer and its networks.
- Check the communication between your computers and others on the Internet.
- Warns of possible connection attempts from other computers.