For a customer looking to upgrade their legacy on-premises proxy to a cloud-based proxy for a hybrid network, the combination of Secure Web Gateway (SWG) and Inline Cloud Access Security Broker (CASB) features in FortiSASE will provide the necessary capabilities.
Secure Web Gateway (SWG):
SWG provides comprehensive web security by inspecting and filtering web traffic to protect against web-based threats.
It ensures that all web traffic, whether originating from on-premises or remote locations, is inspected and secured by the cloud-based proxy.
Inline Cloud Access Security Broker (CASB):
CASB enhances security by providing visibility and control over cloud applications and services.
Inline CASB integrates with SWG to enforce security policies for cloud application usage, preventing unauthorized access and data leakage.
FortiOS 7.2 Administration Guide: Details on SWG and CASB features.
FortiSASE 23.2 Documentation: Explains how SWG and inline-CASB are used in cloud-based proxy solutions.

Zero-trust tags are critical in implementing zero-trust network access (ZTNA) policies. Here are the two key advantages of using zero-trust tags:
Access Control (Allow or Deny):
Zero-trust tags can be used to define policies that either allow or deny access to specific network resources based on the tag associated with the user or device.
This granular control ensures that only authorized users or devices with the appropriate tags can access sensitive resources, thereby enhancing security.
Determining Security Posture:
Zero-trust tags can be utilized to assess and determine the security posture of an endpoint.
Based on the assigned tags, FortiSASE can evaluate the device's compliance with security policies, such as antivirus status, patch levels, and configuration settings.
Devices that do not meet the required security posture can be restricted from accessing the network or given limited access.
FortiOS 7.2 Administration Guide: Provides detailed information on configuring and using zero-trust tags for access control and security posture assessment.
FortiSASE 23.2 Documentation: Explains how zero-trust tags are implemented and used within the FortiSASE environment for enhancing security and compliance.