A network perimeter firewall is a secured boundary providing the main defense of a private network and other public networks, such as the internet. The firewall detects and protects the network against unwanted traffic, potentially dangerous code, and intrusion attempts.
A network perimeter may include:
Firewalls are gatekeepers, either software or hardware positioned between a company's network and the external untrusted networks. They control traffic flow by employing one or more of several methods:
Perimeter firewalls are an essential component of any network security solution. The current cyber landscape is seeing even more sophisticated attacks as well as advancing solutions like the next-generation firewall (NGFW), which are offering greater security against new but unknown threats.
Benefits of a traditional firewall include:
Businesses today face many risks and challenges when protecting their networks and defending against attacks. Some of the risks that must be considered when planning around a perimeter firewall are: