Network-as-a-Service (NaaS): Explained

Network as a service (NaaS) is a cloud delivery model where organizations consume networking infrastructure — connectivity, routing, security, and management — as a subscription instead of owning and operating physical hardware. Rather than buying routers, switches, and firewalls, IT teams provision what they need on demand and pay monthly or annually.

The model has gained traction because modern networks are harder to manage than ever. Distributed workforces, multi-cloud architectures, IoT expansion, and rising bandwidth demands from AI workloads have pushed traditional hub-and-spoke WANs past their limits. NaaS shifts the operational burden to a provider while giving IT teams software-defined control over their network policies.

But moving to a network as a service model raises an important question: if you no longer own the network infrastructure, how do you enforce identity and access at the network edge? That is where cloud-native authentication — managed PKI and Cloud RADIUS — becomes a required layer.

How Network as a Service Works

In a traditional enterprise network, the organization owns every component: the WAN links, the routers, the switches, the firewalls, and the RADIUS servers that authenticate users and devices. IT teams rack, configure, patch, and replace all of it.

NaaS replaces that ownership model with a provider-managed stack. The provider operates the physical and virtual infrastructure. The customer accesses a portal or API to provision connectivity, define routing policies, apply security rules, and monitor performance. Industry bodies like MEF have developed standardized APIs and service blueprints that make NaaS interoperable across providers.

 A typical NaaS deployment includes:

• Connectivity layer — WAN links (MPLS, broadband, LTE/5G) aggregated and managed by the provider, often delivered as SD-WAN
• Network functions — Firewalls, load balancers, DDoS mitigation, DNS, and traffic optimization running as virtual network functions (VNFs) in the cloud
• Management portal — A self-service interface for provisioning, monitoring, and policy changes
• Managed services — Optional tiers where the provider handles day-to-day operations, troubleshooting, and optimization

By integrating all these components into a single service, the network functions as a utility rather than a collection of hardware. This allows IT teams to consume capacity and features as needed, rather than managing the underlying infrastructure.

NaaS vs. Traditional Networking

Here is a side-by-side comparison to examine how NaaS stacks up against traditional networking.

Cost Model	CapEx: Heavy upfront hardware purchases and set refresh cycles.	OpEx: Predictable monthly or annual subscription fees.
Deployment Speed	Slow: Weeks or months for hardware procurement and manual installation.	Fast: Minutes or hours via a self-service portal or API.
Scalability	Fixed: Limited by physical capacity; upgrades require new hardware.	Elastic: Add bandwidth or new sites instantly on demand.
Management Burden	High: Internal teams handle all patching, monitoring, and troubleshooting.	Shared: Provider-managed infrastructure with customer policy control.
Security	Fragmented: Customer-owned firewalls, RADIUS, and NAC.	Integrated: Provider-managed network security (though customer retains identity/access).
Flexibility	Rigid: Locked into specific hardware and vendor ecosystems.	Software-Defined: Reconfigure the entire network without “truck rolls” or site visits.

Benefits of Network as a Service

Here are some of the most important advantages of Network as a Service.

Cost Efficiency

NaaS converts large capital expenditures into predictable operating expenses. Organizations avoid hardware refresh cycles, reduce data center footprint, and eliminate the need for specialized networking staff to maintain physical infrastructure.

Scalability and Elastic Capacity

Adding a new branch office, increasing bandwidth for a seasonal spike, or connecting a new cloud region takes minutes instead of weeks. NaaS providers operate global backbones with pre-provisioned capacity, so customers scale without procurement delays.

Simplified IT Operations

Firmware updates, hardware failures, capacity planning, and performance optimization all become the provider’s responsibility. Internal IT teams focus on policy, security, and user experience rather than infrastructure maintenance.

Faster Deployment

Traditional WAN circuits often require 30-90 day lead times. With NaaS, though, SD-WAN overlays and cloud-managed network functions can be provisioned through APIs and portals, so thatnew sites come online in hours instead of weeks or months.

Built-In Redundancy and Uptime

NaaS providers build redundancy into their backbone — multiple paths, automatic failover, and geographically distributed points of presence. Many offer 99.99% or higher uptime SLAs backed by service credits.

Access to Advanced Technology

Providers invest in AI-driven traffic optimization, advanced threat detection, and multi-cloud interconnection that would be cost-prohibitive for most organizations to build in-house.

Geographic Reach

Organizations with distributed offices, remote workers, or international operations benefit from provider networks that already span regions they would otherwise need to build connectivity into from scratch.

Challenges and Risks of NaaS

Here are the potential pitfalls to watch out for when deploying NaaS.

Vendor Lock-In

Migrating between NaaS providers can be complex. Proprietary configurations, custom integrations, and long-term contracts create switching costs. Organizations should evaluate providers against open standards (like MEF NaaS APIs) and avoid deep dependencies on proprietary tooling.

Security and Compliance Gaps

NaaS providers handle network-layer security like firewalls, DDoS protection, and traffic encryption. But they do not own identity and access management. If authentication relies on shared credentials or legacy protocols like PEAP-MSCHAPv2, the network remains vulnerable to credential theft regardless of how modern the infrastructure is.

This is a gap many organizations overlook. The NaaS provider secures the pipe, but the customer must still secure who and what gets on the network.

Legacy System Compatibility

Organizations with on-premises applications, legacy data centers, or specialized hardware may find that NaaS does not fully replace their existing infrastructure. Hybrid models, where some connectivity remains on-prem while WAN and branch networking move to NaaS, can bridge the infrastructure gap during transitions.

Reduced Customization

Highly specialized network configurations may not be available through a provider’s portal. Organizations with complex Quality of Service requirements, custom routing policies, or unusual protocol needs should validate provider capabilities before committing.

NaaS vs SASE: How They Relate

NaaS and Secure Access Service Edge (SASE) are related but distinct. NaaS is a delivery model focused on network connectivity and infrastructure. SASE is a security architecture that converges networking and security into a single cloud-delivered service.

A SASE platform typically includes:

• SD-WAN for connectivity and traffic optimization
• Secure Web Gateway (SWG) for web traffic inspection
• Cloud Access Security Broker (CASB) for SaaS visibility and control
• Zero Trust Network Access (ZTNA) for application-level access
• Firewall as a Service (FWaaS) for network-layer security

In practice, many SASE vendors deliver their networking layer as NaaS. The two models are converging, so that SASE adds security to the NaaS foundation, while NaaS providers increasingly bundle security features.

The overlap creates an important architectural question: where does network-layer security end and identity-layer security begin? SASE handles traffic inspection and application access. But authenticating users and devices to the network itself, especially over Wi-Fi and VPN, requires 802.1X, certificates, and RADIUS, which sit below the SASE layer.

Aligning Your Authentication Layer with NaaS

When an organization moves to NaaS, it outsources network infrastructure but retains responsibility for who connects to that network. This is where the authentication layer becomes a strategic concern.

Most NaaS and SASE platforms assume that devices connecting to the network have already been authenticated. They enforce policies on traffic after a device is on the network. But the act of granting network access — the 802.1X handshake that happens when a device connects to Wi-Fi or VPN — still requires RADIUS and, ideally, certificate-based authentication.

The problem is that legacy RADIUS servers (like Microsoft NPS) and on-premises PKI (like AD CS) are tied to the physical infrastructure that NaaS is replacing. If the network moves to the cloud but authentication stays on-prem, IT teams inherit the worst of both worlds — a modern network with a legacy identity layer.

Securing NaaS with Certificate-Based Authentication

SecureW2 provides the authentication layer that NaaS architectures need. Here’s how:

• JoinNow Cloud RADIUS authenticates every Wi-Fi and VPN connection using EAP-TLS with digital certificates instead of passwords. It runs as a fully managed cloud service with 99.999% uptime and no on-prem servers to maintain. Cloud RADIUS performs real-time identity lookups against your Identity Provider (Entra ID, Okta, Google Workspace) on every authentication event, so access decisions reflect current user status and device compliance.
• JoinNow Dynamic PKI issues and manages the X.509 certificates that replace passwords. Certificates are enrolled automatically through MDM platforms (Intune, Jamf, Kandji) for managed devices and through JoinNow MultiOS for BYOD. The entire certificate lifecycle — issuance, renewal, revocation — is automated.
• Real-time policy enforcement — When a user is disabled in your Identity Provider or a device falls out of compliance in your MDM, Cloud RADIUS denies access on the next authentication attempt. No manual intervention required.

This approach eliminates the credential theft risk that NaaS on its own does not address. Passwords can be phished, shared, or stolen. Certificates are bound to specific devices, cannot be exported, and are validated cryptographically on every connection.

NaaS Use Cases by Industry

NaaS solves security and operational issues for sectors ranging from education to healthcare. Here’s what that looks like.

Higher Education

Universities with large campus Wi-Fi networks and BYOD populations use NaaS for WAN connectivity between campuses while relying on Cloud RADIUS and managed PKI to authenticate thousands of student and faculty devices through Eduroam-compatible 802.1X.

K-12 School Districts

Districts with dozens of buildings benefit from NaaS to simplify WAN management across sites. Certificate-based authentication ensures student Chromebooks and staff laptops connect securely without passwords that students share or forget.

Enterprises with Distributed Offices

Organizations replacing MPLS with SD-WAN-based NaaS need cloud-native RADIUS to authenticate remote and branch office devices without backhauling traffic to a central data center.

Healthcare

Hospitals and clinics moving to NaaS for network flexibility still face strict HIPAA requirements for network access control. Certificate-based 802.1X authentication provides the device-level identity verification that compliance requires.

Moving to NaaS Without Leaving Identity Behind

Network as a service simplifies infrastructure, reduces costs, and gives IT teams the agility to support distributed, cloud-first organizations. But network modernization is incomplete if the authentication layer stays stuck on legacy on-prem servers.

SecureW2 provides the cloud-native identity and access layer that NaaS requires. Cloud RADIUS and Dynamic PKI replace passwords with certificates, authenticate every connection in real time against your Identity Provider, and eliminate the on-prem RADIUS and PKI servers that NaaS is designed to make obsolete.

Talk to our team about securing your NaaS deployment with cloud-native authentication.

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Frequently Asked Questions

What does network as a service mean?

Network as a service (NaaS) is a cloud delivery model where an organization subscribes to networking infrastructure — connectivity, routing, firewalls, and management — from a third-party provider instead of buying and maintaining its own hardware. The provider operates the physical network; the customer controls policies and configuration through a portal or API.

What is the difference between NaaS and SaaS?

SaaS delivers software applications (like email or CRM) over the internet. NaaS delivers network infrastructure (like WAN connectivity, SD-WAN, firewalls, and load balancers) as a service. SaaS runs on top of the network; NaaS is the network itself.

Is NaaS the same as SASE?

No. NaaS is a delivery model focused on network connectivity and infrastructure. SASE is a security architecture that combines networking (typically SD-WAN) with security services (SWG, CASB, ZTNA, FWaaS) in a single cloud platform. Many SASE platforms use NaaS for their connectivity layer, but SASE adds integrated security that standalone NaaS does not include.

How does NaaS affect network security?

NaaS providers handle network-layer security like firewalls and DDoS protection. But identity and access control remains the customer's responsibility. Organizations should pair NaaS with cloud-native authentication like Cloud RADIUS and managed PKI to enforce certificate-based 802.1X access and eliminate password-based vulnerabilities.

Who are the main NaaS providers?

Major NaaS providers include Megaport, Equinix, Lumen, AT&T, and Aryaka for connectivity-focused NaaS. SASE-oriented providers like Zscaler and Cato Networks bundle networking with security. The provider landscape is growing rapidly as SD-WAN and cloud networking converge.