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What is Secure Access Service Edge (SASE)?
Secure Access Service Edge (SASE) is a cloud architecture model that combines network and security as a service capability in an integrated solution. Defined by Gartner in 2019, SASE is designed to provide secure and fast cloud-based network services to businesses with increasingly remote workforces and cloud-based applications.
The key components of SASE include software-defined wide area networking (SD-WAN), secure web gateway, zero trust network access, and firewall as a service among other security services.
Essentially, SASE allows organizations to manage network security, performance, and access policies in an agile and efficient manner. This is achieved by applying security policies closer to the point of access, reducing the distance data has to travel, which in turn reduces latency and improves network performance.
While SASE is not considered a model for campus security, the Nile Access Service leverages zero trust principles to secure campus and branch deployments from an access perspective. Nile’s efforts align best with the zero-trust network access (ZTNA) component within the SASE model. In a separate article, we also outline what SSE or Security Services Edge is and where it fits into the SASE equation. The remainder of this article is focused on SASE and how it fits into today’s modern security landscape.
How does SASE work?
Secure Access Service Edge works by merging network security and Wide Area Networking (WAN) capabilities in the cloud. It operates by connecting and securing all enterprise networks (including mobile users, data centers, offices, and cloud resources) by providing necessary services through a single cloud-delivered architecture.
SASE ensures that traffic flows between the nearest SASE node in the cloud and the user or device, rather than backhauling it to a central data center or office. This results in optimized performance and improved user experience, reducing latency, which is especially beneficial for real-time applications like voice and video.
SASE employs a zero trust security principle, meaning it doesn’t inherently trust any entities in the network, regardless of whether they exist inside or outside of its perimeters. Instead, trust is continually evaluated based on the identity of the user or device, the context of the access, and the security posture of the endpoint.
The SASE approach integrates with several key components such as a secure web gateway (SWG), zero-trust network access (ZTNA), cloud access security broker (CASB), and firewall-as-a-service (FWaaS). All these elements are combined with the networking capabilities of SD-WAN, providing a single platform to manage the network and security needs of an enterprise.
In summary, SASE works to secure and speed up the network traffic by uniting cloud security technologies and WAN capabilities under a single, globally distributed cloud service, making it more scalable, flexible, and efficient than traditional network architectures.
How does SASE compare to other technology and security solutions?
SASE offers a distinctive approach compared to traditional security and network solutions by integrating comprehensive WAN capabilities and security functions into a unified, cloud-native service.
Unlike traditional models that require separate solutions for networking and security, SASE combines these needs into one platform, reducing complexity and enhancing security coherence. This integrated approach allows for more agile responses to security threats and network demands, adapting quickly to changes in traffic patterns and threat landscapes.
SASE’s cloud-native design contrasts with conventional hardware-centric solutions, which often involve significant capital expenditure and complex maintenance. SASE’s as-a-service model ensures scalability and flexibility, enabling organizations to easily adjust their network and security capacity as their business needs evolve.
This model also supports rapid deployment across multiple regions without the logistical challenges of physical hardware deployment, making it ideal for supporting a distributed workforce.
What are the different components of SASE?
SASE brings together essential network and security functions into a cohesive and manageable service model. Here we explore the major components that constitute the SASE architecture, each serving a unique role in enhancing the network’s efficiency and security.
SD-WAN
SD-WAN is a foundational component of SASE that enhances routing capabilities across wide-area networks. It enables dynamic path selection for traffic across multiple locations, optimizing performance and reducing latency by selecting the best route based on current network conditions.
Firewall-as-a-service (FWaaS)
FWaaS provides robust network security by acting as a barrier against external threats. It integrates with the SASE architecture to offer scalable, cloud-native firewall protection that can adapt to the changing perimeter of modern networks.
Secure web gateways (SWG)
Secure web gateways are crucial for safe Internet access. They’re used to enforce corporate and regulatory policies by inspecting and filtering unwanted software or malware from user-initiated web traffic, thereby preventing data breaches and intrusions.
Cloud access security brokers (CASB)
CASBs protect cloud environments by mediating between users and cloud service providers. They enforce security policies, compliance, and governance for cloud applications, offering visibility and control over data and mitigating security risks associated with cloud computing.
Zero-trust network access (ZTNA)
ZTNA is a security model that operates on the principle of “never trust, always verify.” It provides secure remote access to an organization’s applications, only granting access based on the user’s identity and context, significantly enhancing the security posture by reducing the attack surface. ZTNA typically involves installing agents on laptops and other mobile devices carried by users.
SASE use cases
SASE is particularly well-suited for organizations that operate on a global scale and require a unified network security posture across multiple geographical locations. For example, companies with a remote or hybrid workforce benefit from SASE’s ability to provide secure and consistent access to corporate resources regardless of an employee’s location. This is achieved by integrating identity and policy enforcement into the network, ensuring that all access is secure and compliant with corporate policies.
Additionally, organizations moving their applications to the cloud can leverage SASE to secure cloud connectivity and protect data in transit between users and cloud services. SASE simplifies the management of network and security policies across multiple cloud environments, providing centralized visibility and control that is critical for maintaining security in cloud-centric operations.
Lastly, industries such as finance or healthcare, which are subject to stringent regulatory requirements, find value in SASE’s comprehensive security features that support compliance and data protection standards. By consolidating security functions into a single framework, SASE helps these organizations streamline compliance processes and reduce the risk of breaches.
How to set up Secure Access Service Edge
Implementing SASE requires a strategic and structured approach to ensure that the integration enhances network security and operational efficiency.
1. Network and security architecture assessment
The first step in setting up SASE is to conduct a detailed assessment of the existing network and security architectures. This process involves mapping out all network touchpoints and security protocols in place to identify any gaps or inefficiencies that SASE can address, ensuring that the solution is tailored to the specific needs of the organization.
2. Choosing the right SASE provider
Selecting an appropriate SASE provider is critical. Organizations should evaluate potential providers based on their ability to deliver a truly integrated SASE solution that encompasses all necessary security and networking functions, as well as their industry reputation and the scalability of their solutions to accommodate future growth and evolving security threats.
3. Pilot project implementation
Before fully integrating SASE across the organization, starting with a pilot project is advisable. This step allows IT teams to deploy SASE on a smaller scale initially, which helps in adjusting and optimizing the configuration settings and security policies based on real-world feedback and performance analytics.
4. Full-scale deployment
Once the pilot project meets organizational standards and requirements, the next step is to proceed with a full-scale deployment. This phase involves a broader implementation of SASE components, comprehensive training for IT staff on managing the new system, and establishing ongoing monitoring and support protocols to ensure continuous optimization.
What are the benefits of using SASE?
Enhanced security posture
SASE enhances an organization’s security posture by integrating advanced threat prevention, detection, and response mechanisms directly into the network. This unified security model allows for real-time threat intelligence and consistent policy enforcement across all points of access, greatly reducing the risk of data breaches and other cyber threats.
Simplified network management
With SASE, network management becomes less complex and more streamlined. By converging networking and security services into a single framework, organizations can eliminate redundant hardware and reduce the need for multiple management consoles, making network administration more efficient.
Consistent policy enforcement
SASE ensures that security policies are uniformly enforced across all environments, including remote workstations, branch offices, and cloud platforms. This consistency is crucial for maintaining security standards and compliance, particularly for organizations subject to stringent regulatory requirements.
Improved network performance and user experience
SASE optimizes network performance by routing traffic through the closest point of presence (PoP), which minimizes latency and maximizes speed. This improvement in network efficiency significantly enhances the user experience, particularly for cloud-based applications and remote interactions.
What are the potential challenges of using SASE?
Legacy system integration
Integrating SASE with legacy IT infrastructures poses a significant challenge due to compatibility issues with older systems that are not designed for cloud-native services. Organizations may need to invest in upgrades or middleware solutions to bridge the gap between old and new technologies, ensuring seamless connectivity and security coverage across all network segments.
Complex policy management
As SASE requires managing security policies across highly distributed environments, the complexity of policy administration can increase substantially. To address this, organizations must develop sophisticated governance frameworks that can automate and synchronize policy settings from a central platform, reducing manual oversight and potential for errors.
Adaptation to a new operational model
The shift from traditional network security approaches to a SASE model involves significant changes in operational practices and workflows. IT teams must undergo comprehensive training to understand and efficiently manage the integrated network and security operations that SASE brings, which could involve considerable time and resource investment.
What are the common misconceptions about using SASE?
SASE is just another security product
A common misconception is that SASE is merely an additional security product that organizations can plug into their existing network architectures. In reality, SASE represents a comprehensive shift towards a converged network and security model that requires a holistic approach to implementation, encompassing both technological integration and strategic planning.
SASE can instantly solve all security issues
Another misunderstanding is the belief that SASE can immediately resolve all security challenges. While SASE significantly enhances security posture and management, it is not a magic solution that eliminates all threats. Effective use of SASE requires continuous monitoring, management, and adaptation to evolving security landscapes.
SASE is suitable for every organization
Some may believe that SASE is a one-size-fits-all solution applicable to every type of organization. However, the reality is that the transition to SASE depends on specific business needs and existing infrastructure. For some, the shift might be straightforward, while for others, particularly those with extensive legacy systems or specialized compliance requirements, it could be more complex.
How to choose a SASE provider
Selecting a SASE provider requires a careful evaluation of their integration capabilities, particularly how well they blend networking and security into a seamless service. Key factors include the provider’s innovation in cloud architecture, as this technology underpins the SASE framework. Their ability to integrate into a campus environment is also important.
Prospective users should examine the geographical distribution of the provider’s Points of Presence (PoPs) to ensure low-latency service regardless of where end-users are located. It’s also crucial to assess the provider’s commitment to regulatory compliance and data privacy, which can vary significantly between vendors.
Organizations should request detailed case studies or pilot testing opportunities to observe the provider’s performance in real-world scenarios. Lastly, the ability to provide detailed analytics and reporting tools is essential for ongoing management and visibility of network and security events.
What are the best practices for SASE implementation?
Comprehensive pre-implementation assessment
Before implementing SASE, a detailed assessment of existing network and security infrastructures is essential. This audit should focus on understanding current traffic flows, security controls, and user behaviors. Insights gathered will guide the customization of the SASE solution to fill the identified gaps effectively and match the specific security and operational needs of the organization.
Phased deployment strategy
Adopting a phased approach to deploying SASE allows for manageable, iterative rollouts. Start with deploying SASE in the most critical areas that require immediate attention or stand to benefit the most from enhanced security and network management. This strategy helps in mitigating risks and allows for adjustments based on initial outcomes before full-scale implementation.
Skills development and training
Ensuring that IT staff are well-prepared to manage the new SASE environment is key to successful implementation. Invest in training programs that cover new skills and knowledge areas specific to SASE management, including cloud-based security integration, policy orchestration, and advanced threat prevention techniques.
Regular monitoring and iterative optimization
Post-implementation, it’s important to establish a routine of continuous monitoring and periodic review of the SASE infrastructure. Utilize the analytics tools provided by the SASE solution to gain insights into performance and security trends. This data should be used to refine and optimize network configurations and security policies regularly, adapting to new threats and changing business needs.
Bolster your network security and performance with Nile
At Nile, network security is the foundation of our platform. Every connected mobile and IoT device is profiled and isolated from each other, eliminating lateral movement and preventing cross-device proliferation of malware while securing critical network segments.
Translating the zero-trust networking principles to the enterprise campus and branch, the Nile Access Service mandates stringent access controls and continuous authorization for all connected devices, whether they are wired or wireless. Nile aligns best with SASE’s ZTNA component, but from a campus perspective. We believe that the network offers the best and simplest solution for protecting IoT devices and ensuring the hybrid workers that visit a campus are as secure as when connected remotely.
Nile goes beyond conventional security measures by proactively monitoring the network for any deviations from baseline behavior that could indicate security breaches. By mandating continuous authorization. You can breathe easier knowing your data and devices are secure wherever work takes you.
Don’t wait until it’s too late. Start your journey with Nile today.
