Stateful Inspection Firewall

A firewall that evaluates the state or the context of network traffic. By examining source and destination address, application usage, source of origin, and relationship between current packets with the previous packets of the same session, stateful inspection firewalls are able to grant a broader range of access for authorized users and activities and actively watch for and block unauthorized users and activities. Stateful inspection firewalls are known as third-generation firewalls.