Introduction
As businesses shift to cloud-first and remote work environments, Secure Access Service Edge (SASE) is emerging as the leading solution for modern network security. This article explores what SASE is, how it enhances security, and why it outperforms traditional models.
We’ll break down the key components of SASE, its security advantages, and how it works. You'll also discover how to choose the right SASE provider, what to consider when adopting SASE, and use cases for it within a business like yours. By the end, you’ll have a clear roadmap to leverage SASE for a more secure, scalable, and efficient network.
What is SASE?
SASE can seem like a complex solution, so we're comparing it to a game of Snakes and Ladders. Watch the video here.
Definition
SASE, or Secure Access Service Edge, is the convergence of 5 Connectivity and network Security technologies that work seamlessly together to secure users and devices from internet-based threats and cloud-based threats.
As employees' workspaces remain equally as likely to be a dining table as they are a meeting room, securing users and devices regardless of location is crucial as the rate of cyber threats still grows exponentially year on year.
How SASE Works
SASE combines networking and security services into a single, cloud-native framework to provide secure, high-performance access to applications and data from any location.
Traditional network security models rely on on-premises hardware and data centres and are no longer sufficient to handle the complexities of a distributed workforce, cloud adoption, and increasingly sophisticated cyber threats.
- Integration of SD-WAN and security services
- Cloud-native architecture and its benefits
By combining networking and security into one unified, cloud-native service, SASE provides secure, efficient access to applications and data, no matter where users are located.
Components of SASE
SASE isn't its own technology but a collection of market-leading solutions that converge to create a single, coherent network security solution that's pulled together using a management platform.
Cloud Access Security Broker (CASB)
Cloud Access Security Brokers (CASBs) are a layer of security that sits between a business's users and their cloud applications to provide enhanced visibility and control over data and traffic.
CASBs monitor user activity across cloud services, apply security policies, prevent data loss, and ensure compliance. They secure sensitive data via encryption, DLP policies, and block unauthorised access while detecting malware or abnormal user behaviour.
Firewall as a Service (FWaaS)
FWaaS is a cloud-based, next-generation firewall that provides intrusion prevention and security measures to protect users from malicious network traffic.
Zero Trust Network Access (ZTNA)
Zero Trust Network Access (ZTNA) ensures secure access to applications and data by continuously verifying users and devices, applying least privilege principles, and monitoring for threats.
Secure Web Gateway (SWG)
SWG protects users from web-based threats by enforcing security policies on internet traffic. It blocks malware, phishing, ransomware, and filters content based on corporate policies.
Did you know that 90% of data breaches are caused by phishing attacks?
Software Defined Wide Area Network (SD-WAN)
SD-WAN is a cloud-based architecture that simplifies wide area networks by intelligently directing traffic over optimal connections, improving performance, security, and reducing costs.
The Primary Benefits of SASE
Security, Cost, Simplicity
SASE enhances security by integrating Zero Trust principles, end-to-end encryption, and centralised policy enforcement. Combining SWG, CASB, FWaaS, and intrusion prevention into a single cloud-native solution eliminates security gaps, reduces complexity, and provides real-time threat protection at scale.
SASE reduces costs by consolidating networking and security services into a single cloud-native platform, eliminating multiple standalone solutions and expensive hardware. Its scalable pay-as-you-grow model lowers operational expenses and optimises network performance without costly infrastructure investments.
SASE simplifies network security by unifying networking and security functions into a single solution, streamlining operations, enhancing visibility, and ensuring consistent security across all users and locations.
SASE vs. Other Solutions
Alternatives typically involve separate networking and security solutions rather than an integrated cloud-native approach:
- Traditional MPLS with On-Prem Security – Stable but lacks scalability and flexibility.
- SD-WAN with Separate Security Services – Complex and harder to manage.
- VPNs for Remote Access – Can create security gaps and performance bottlenecks.
- Standalone Cloud Security Solutions – Leads to siloed policies and higher management overhead.
- DIY Hybrid Approach – Complex, costly, and difficult to scale.
Use Cases for SASE
Securing Remote Workers
SASE secures remote workers by integrating multiple security functions into a single platform. It continuously verifies identity and device health, encrypts data, provides threat protection, and uses SD-WAN to optimise traffic for secure access to cloud applications.
Cloud Application Access Control
SASE uses CASB to provide visibility into cloud usage, enforce policies, protect sensitive data, and prevent unapproved cloud apps (shadow IT).
Branch Office Connectivity
SASE integrates SD-WAN and FWaaS to enhance connectivity, reduce reliance on MPLS circuits, optimise routes, and centralise security policy management.
Protecting Employees from Internet-Based Threats
How to Choose the Best SASE Provider
Selecting the right SASE provider ensures a secure, high-performance, scalable network. Evaluate vendors based on integration, simplicity, and cost-effectiveness.
1. Centralised Approach for Unified Management
Combines networking and security into a single platform, ensuring consistent policy enforcement and reducing complexity.
2. Cloud-Native Design for Scalability and Flexibility
Scales dynamically, adapts to workloads and threats without heavy hardware investments.
3. Global SLA-Backed Private Backbone
Ensures secure, optimised connectivity globally with minimal latency.
4. Integration of Network and Security Services
Includes SD-WAN, SWG, CASB, FWaaS, and ZTNA to eliminate security gaps.
5. Compatibility with Legacy Systems
Smooth migration paths ensure business continuity without costly overhauls.
6. Multitenancy Capabilities
Supports multiple departments or clients with isolated security policies and network configurations.
7. Role-Based Access for Granular Control
Reduces security risks by limiting permissions and aligning with Zero Trust principles.
