[1][2] NetScreen Technologies developed ASIC-based Internet security systems and appliances that delivered high performance firewall, VPN and traffic shaping functionality to Internet data centers, e-business sites, broadband service providers and application service providers.

[6] Ken Xie left NetScreen in 2000 to found Fortinet, a competing ASIC-based firewall company.

OneSecure was created by Rakesh Loonkar (subsequently the co-founder of Trusteer), and Israeli engineer Nir Zuk, who had been one of Check Point Software’s first employees.

[9] Anson Chen, a 12-year veteran of Cisco Systems, Inc. and former vice president and general manager of the Network Management and Services Technology Group, led engineering, research and development efforts for NetScreen's entire product line, including its firewall, IPSec virtual private network (VPN) and intrusion detection and prevention technologies.

[11] In December 2015, Juniper Systems announced that they had discovered "unauthorized code" in the ScreenOS software that underlies their NetScreen devices, present from 2012 onwards.