SonicWall, originally a private company headquartered in Silicon Valley, and a Dell subsidiary from 2012 to 2016, sells a range of Internet appliances primarily directed at content control and network security. These include devices providing services for network firewalls, UTMs, VPNs, and anti-spam for email.
In the late 1990s the company released a security product initially called "Interpol" and later branded "SonicWALL", a dedicated hardware appliance with firewall and VPN software intended for the small-business market. As sales for the security appliances rapidly accelerated, the company exited the Apple add-on networking business and refocused exclusively as a network security company
In late 1999 the company changed its name from Sonic Systems to SonicWALL, Inc. to represent the shift to a network security company, and in November 1999 SonicWall went public (SNWL).
On March 13, 2012, Dell announced that they had signed a definitive agreement to acquire SonicWall.