The network firewall is one of the original network security tools and remains one of the most important tools used by IT organizations of all sizes. The firewall has evolved rapidly in recent years in response to the emergence of sophisticated and always changing threats. Unified threat management (UTM) and next generation firewall (NGFW) are two terms used to describe modern network firewalls that offer a range of multifunctional security capabilities. Firewall threat detection capabilities must be continually improved in order to detect attackers that are more sophisticated and difficult to detect, and that exploit a greater number of network entry points. As a result, though the firewall market is growing rapidly, the ability to compete in the market has proven difficult for newcomers.
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