A secure web gateway (SWG) is a security solution that prevents unsecured internet traffic from entering an internal network of an organization. It is used by enterprises to protect their employees and users from accessing and being infected by malicious web traffic, websites with vulnerabilities, internet-borne viruses, malware, and other cyberthreats. It also ensures the implementation and compliance of the organization’s regulatory policy.
According to Gartner, a secure web gateway must, at a minimum, include URL filtering, malicious-code detection and filtering, and application controls for popular cloud applications, such as instant messaging (IM) and Skype. Native or integrated data loss prevention is also included. More recently, Gartner has identified CASB as a critical component of a security architecture that is increasingly based on the secure access service edge (SASE) framework.