In contrast to traditional firewalls, which at the time relied on simple rules such as port numbers and protocol to block traffic, the authors stated that next-generation firewalls should operate on and inspect all layers of the network stack and be intelligent enough to block threats independently of port numbers or protocols used. In 2009, Gartner released a publication defining a next-generation firewall.
In 2007, the company produced and shipped its first product, an enterprise firewall. Zuk created Palo Alto Networks with the intention of solving problems enterprises faced with existing network security solutions, namely: the inability to allow employees to use modern applications safely, which entailed developing a firewall capable of identifying and providing fine-grained control of applications. Palo Alto Networks was founded in 2005 by Israeli-American Nir Zuk, a former engineer from Check Point and NetScreen Technologies, and was the principal developer of the first stateful inspection firewall and the first intrusion prevention system. ( April 2019) ( Learn how and when to remove this template message)
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