Jiki

Firewalls work in a few different ways. The most common method is for information that is attempting to be accessed to be divided into “packets” and filtered, looking for keywords, IP addresses, or domain names that are not allowed in the system. Firewalls also look for packets of information that could contain viruses, spyware, or other potentially harmful programs, and blocks suspicious information from gaining access to the network. There are different levels of security that can be set on a firewall, from blocking literally everything to turning the firewall off and letting all information flow freely. Each user needs to determine for themselves an appropriate level of filtering and protection.