Zero trust
Never trust, always verify. A VPN badge is not a day pass. Identity, device, path, and data each get asked again.
Zero trust is an architecture idea: assume breach, authenticate and authorise every request, minimise blast radius, log the path.
It is not a product. Buying a ZTNA box and leaving standing domain admin is a rebrand.
Start with identity (phishing-resistant MFA, least privilege), device health, and segmentation around crown jewels. Then argue about overlays.