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Next-generation firewalls combine application awareness and deep packet inspection to give companies more control over applications while also detecting and blocking malicious threats.
Traditional stateful inspection firewalls have effectively become obsolete because of two significant limitations. First, they don't inspect the data payload of network packets. Second, while more and more network traffic uses Web protocols--including legitimate business applications, non-business applications and attacks--traditional firewalls don't have the fine-grained intelligence to distinguish one kind of Web traffic from another and enforce business policies, so it's either all or nothing.