The document "Transform Source IP-address-based Application Access with Zscaler" discusses the limitations of using source IP address identification for securing application access in modern cloud-first, remote work environments. As enterprises adopt SaaS applications and migrate to the cloud, IP address-based controls become less effective. The paper highlights the need for evolving to identity-based authorization mechanisms like multi-factor authentication (MFA). It also addresses the challenges and considerations in transitioning from IP-based controls to more advanced security models, emphasizing the importance of adopting solutions like Zscaler to protect modern work practices.

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