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Security Fundamentals & Crypto · Intermediate

Secure Web Gateway (SWG)

Security service that filters user web traffic for malware, URL categories, and policy violations.

Definition

SWGs enforce acceptable use, block malicious sites, inspect downloads, and often decrypt TLS for inspection and DLP. They can be on-premises appliances or cloud services and are a core component of SSE. Examples include Zscaler Internet Access, Netskope, Cisco Secure Access, and Palo Alto Prisma Access.

Example

A user's attempt to download an executable from a newly registered domain is blocked by the SWG.

Exam tip

SWG protects users' outbound web access; WAF protects inbound access to web apps.

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