The internet is a powerful tool for every business. It also introduces a threat to networks, computers and its users. The firewall is the network appliance that protects an internal network from the outside world. It monitors the data on the network allowing or blocking traffic based on set rules. The firewall also allows a network to split it into secure parts, record where users visit and allow remote access.
Firewall Software and Firewall Appliances
Functions of a Firewall
What firewalls can’t do!
Firewalls cannot protect against internally introduced attacks that come from infected USB Flash drives or from outside machines brought in and connected to a network. Be careful what is allowed to be brought in!
Wireless Networks and Firewalls
Using the firewall, a network can be split into public and private parts or Virtual Local Area Networks (VLANs). The public WIFI allows access to the internet and possibly some internal information. The private, secured WIFI allows access to the entire network. For example, “Public-WIFI” or “Private-WIFI” seen at airports or hotels.
A VLAN-capable, business-class firewall or wireless device is required.