The Role of Zero Trust & Secure Access in Modern IT Environments

Zero Trust and Secure Access platforms control access to applications and services by verified identity, device condition, location, context, and risk, rather than trusting network position alone.

The platform you choose determines how precisely you can enforce least-privilege access, support remote users and third parties, and whether policy changes, posture checks, and session controls are handled centrally or through workarounds.

As a partner to vendors including HPE, Cisco, Juniper, and Fortinet, we specify Zero Trust and Secure Access against your requirements, so you're not overcommitted on licensing and features you will not use or short on coverage for the users, devices, and applications you need to secure.

Meeting the Demands of Modern Networks

Modern Zero Trust and secure access platforms are built to handle the demands placed on hybrid access, from identity and device trust to least-privilege control and continuous verification.

Strengthening Identity-Based Security

Access decisions are based on verified identity, device condition, application context, and risk rather than relying only on where a user connects from.

Securing Remote & Hybrid Workers

Zero trust access gives remote users controlled access to approved applications without exposing the wider corporate network through traditional VPN connections.

Enforcing Zero Trust Access

Least-privilege policies restrict users to the specific systems and services they need, with trust reassessed throughout each session.

Improving Network Access Control

Device profiling, posture checks, and policy enforcement help prevent unmanaged or non-compliant devices from reaching sensitive network resources.

Protecting Business Applications

Application-level access controls reduce exposure by keeping internal services hidden from users and devices that have not been explicitly authorised.

Simplifying Security Operations

Central policy, identity integration, and consistent access logs help security teams manage permissions and investigate access activity more efficiently.

Typical Enterprise Environments

Zero Trust & Secure Access adapts to different environments, each with distinct users, applications, risk levels, and control requirements.


Corporate Campuses

Identity-aware access applies consistent policy across wired, wireless, and applications without automatically trusting internal users or devices.

Multi-Site Organisations

Consistent access controls across branches, offices, data centres, and cloud services reduce policy drift and simplify oversight.

Hybrid Workforces

Application-specific access for office, home, and mobile users limits unnecessary network exposure while supporting flexible working securely.

Enterprise Data Centres

Least-privilege access and continuous verification protect internal applications and privileged systems, helping reduce lateral movement after compromise.

Regulated Industries

Detailed access control, session visibility, and audit records protect sensitive systems while supporting governance and compliance requirements.

Cloud Environments

Identity-aware policy secures SaaS, cloud consoles, hosted applications, and workloads with consistent controls beyond the traditional perimeter.

Key Considerations When Deploying Zero Trust & Secure Access

Getting these areas right helps avoid excessive access, identity gaps, unsupported applications, weak device controls and unnecessary user friction.


01

Identity Strategy

Confirm identity sources, authentication methods and account governance so access decisions are based on reliable user and role information.

02

Network Access Control

Validate device discovery, posture assessment and enforcement options so unmanaged or non-compliant devices cannot reach sensitive resources.

03

Zero Trust Architecture

Define least-privilege policies, trust signals and continuous verification so access remains limited to approved users, devices and applications.

04

Remote Access

Map remote users, third parties and application requirements so zero trust access can replace broad VPN connectivity without disrupting work.

05

Compliance Requirements

Identify audit, retention and access-control obligations so policies and activity records support governance and regulatory evidence.

06

Platform Integration

Confirm integration with identity, endpoint, network and security tools so access decisions use consistent context across the environment.

Technology Comparison: Zero Trust vs Traditional Perimeter Security

Both approaches control access, but they decide trust differently. Comparing user location, device ownership and the level of access required helps teams determine where perimeter security is enough and where zero-trust controls are needed as an additional layer.

Zero Trust & Secure Access Traditional Perimeter Security
Trust model Checks identity, device condition and context before granting access to a specific application or resource Places greater trust in users and devices once they have entered a protected network
Best-fit access Remote, hybrid, contractor and third-party access to cloud or internal applications Managed users and devices working mainly from known offices, campuses or internal networks
Access scope Limits each user to the application or resource they need and can reassess access when conditions change Controls entry to network areas, where approved users may reach a wider group of internal resources
Management model Uses identity, device and application information to apply access rules across locations Uses firewalls, VPNs and network segmentation to control access around trusted network boundaries
What it is not built for Replacing firewalls, segmentation and other network security controls required across the wider environment Granular application access for distributed users, unmanaged devices and changing risk without adding identity-led controls

Enterprise Platforms We Recommend

The right secure-access vendor depends on the mix of users and devices, the existing network and security estate, and how much policy depth, endpoint context, and operational simplicity teams require.


Fortinet Zero Trust & Secure Access product

Fortinet

Best for: Fortinet environments that need identity services, endpoint posture, and network admission controls for unmanaged, IoT, and operational devices across the estate.

Why this vendor
  • FortiAuthenticator centralises RADIUS, certificates, directories, and token-based authentication
  • FortiClient combines endpoint posture, VPN, and zero-trust network access in one agent
  • FortiNAC identifies and controls unmanaged, IoT, and operational technology devices
  • FortiEDR adds endpoint detection and response for devices accessing critical applications
Juniper Mist Access Assurance product

Juniper Networks

Best for: Juniper Mist customers that want cloud-native access control without deploying, upgrading, and maintaining traditional on-premises NAC appliances across campus environments.

Why this vendor
  • Juniper Mist Access Assurance provides cloud-delivered network access control without local NAC appliances
  • Mist Access Assurance applies identity and device policy across wired and wireless access
  • Juniper Mist Cloud combines access context with network and user-experience telemetry
  • Juniper Marvis identifies authentication, policy, and connectivity issues affecting individual users
Cisco Zero Trust & Secure Access product

Cisco

Best for: Cisco environments that want coordinated identity verification, network admission, endpoint connectivity, and web protection rather than relying on a single-purpose access product.

Why this vendor
  • Cisco Duo adds multi-factor authentication, device trust, and adaptive access controls
  • Cisco Identity Services Engine applies user and device policy across wired, wireless, and VPN access
  • Cisco Secure Client combines VPN, zero-trust access, posture, and endpoint connectivity
  • Cisco Umbrella adds DNS security and secure web controls for users working beyond the corporate network
Aruba ClearPass product

HPE Aruba Networking

Best for: Complex multi-vendor campuses that need detailed access control, endpoint profiling, and flexible guest, contractor, or BYOD onboarding across different network domains.

Why this vendor
  • Aruba ClearPass applies identity and device policy across wired, wireless, and VPN access
  • ClearPass profiling identifies unmanaged, IoT, and headless devices before access is granted
  • ClearPass Policy Manager combines identity, posture, device type, and location in access decisions
  • Aruba Central adds cloud visibility across the HPE Aruba wired and wireless environment

Find your ideal zero trust/secure access software

Full technical specifications are available on each product page.

Model Platform Type Primary Function Deployment Model Management Scope Target Environment Licensing Model
Aruba ClearPass – HPE Aruba Network Access Control (NAC) Aruba ClearPass – HPE Aruba Network Access Control (NAC) Network Access Control Identity & Access Management Software Platform Network Access & Device Visibility Enterprise Networks Subscription-Based View
Cisco Duo – Multi-Factor Authentication & Zero Trust Access Cisco Duo – Multi-Factor Authentication & Zero Trust Access Identity Security Multi-Factor Authentication Cloud-Delivered User Access & Identity Cloud, Hybrid & On-Premises Subscription-Based View
Cisco Identity Services Engine – Network Access Control (NAC) Cisco Identity Services Engine – Network Access Control (NAC) Network Access Control Identity & Access Management Software Platform Network Access & Policy Control Enterprise Networks Subscription-Based View
Cisco Secure Client – Secure Remote Access & Zero Trust Client Cisco Secure Client – Secure Remote Access & Zero Trust Client Endpoint Security VPN & Zero Trust Connectivity Endpoint Software Remote User Connectivity Hybrid Workforce Subscription-Based View
Cisco Umbrella – DNS Security & Secure Web Gateway Cisco Umbrella – DNS Security & Secure Web Gateway Cloud Security DNS Security & Secure Web Gateway Cloud-Delivered Internet & Cloud Access Hybrid Workforce Subscription-Based View
FortiAuthenticator – Identity & Access Management Platform FortiAuthenticator – Identity & Access Management Platform Identity Security Identity & Access Management Software Platform Authentication & Identity Services Enterprise Networks Subscription-Based View
FortiClient – Endpoint Protection & Zero Trust Network Access FortiClient – Endpoint Protection & Zero Trust Network Access Endpoint Security Endpoint Protection & Zero Trust Access Endpoint Software Endpoint Security & Remote Access Hybrid Workforce Subscription-Based View
FortiNAC – Network Access Control & Device Visibility Platform FortiNAC – Network Access Control & Device Visibility Platform Network Access Control Device Visibility & Access Control Software Platform Network Access & Endpoint Visibility Enterprise Networks Subscription-Based View
Juniper Mist Access Assurance – Network Access Control & Zero Trust Juniper Mist Access Assurance – Network Access Control & Zero Trust Network Access Control, Network Assurance AI-Driven User Experience Monitoring, Zero Trust Network Access Control Cloud-Delivered Identity, Access & Policy Management, Network Performance & User Experience Campus & Branch Networks, Campus Networks Subscription-Based View
Steel City Consulting logo

Get a clear recommendation for your network

Unsure which software is the right fit for your requirements? Our specialists can assess your workloads, existing estate, growth plans, and operational requirements, then recommend the right approach.

Why Work With Steel City Consulting

We’re trusted by IT teams in enterprise environments, campuses and distributed workforces. Our role is to help you make the right platform decisions for zero trust and secure access, with practical support across HPE Aruba, Cisco and Juniper.

  • Official multi-vendor partner Pricing, licensing and upgrade routes across leading infrastructure vendors.
  • Decades of IT expertise Hands-on consultancy across networking, compute, storage and security.
  • UK-wide support network Certified engineers and technicians for on-site projects, SLAs and break/fix cover.

Zero Trust & Secure Access Services

Support across the full zero trust and secure access lifecycle

From architecture and deployment to optimisation and modernisation, we help you control access using identity, device trust and application context rather than network location alone.

Zero Trust & Secure Access Procurement & Vendor Support

We help you compare suitable platforms across HPE Aruba, Cisco and Juniper — balancing identity coverage, device checks, enforcement and total cost.

Compatibility & integration planning

We assess your infrastructure, APIs, data sources and workflows to ensure software is compatible.

Trade-in & refresh options

Maximise value from existing equipment and refresh with ease.

Need help with zero trust and secure access?

Speak to our experts about selecting, deploying or optimising zero trust and secure access platforms.

Speak to a specialist today

Explore Related Technology

If you're planning zero trust and secure access, these categories cover the surrounding SASE, security management, analytics and network automation layers needed to enforce policy consistently.

Network Management & Automation

Software for configuring, monitoring, and automating network operations across campus, data centre, WAN, and cloud-connected environments.

Browse platforms

Security Analytics

SIEM, XDR, and security analytics platforms that correlate activity across multiple controls to improve threat detection, investigation, and response.

Browse platforms

SIEM & XDR

Centralised platforms for managing security policy, configuration, events, compliance, and operational workflows across multiple security controls.

Browse platforms

Security Management

Cloud-delivered networking and security platforms that combine secure access, policy enforcement, and WAN connectivity for users, sites, and applications.

Browse platforms

zero trust/secure access FAQ

How do I choose the right zero-trust and secure access platform?

Choose by matching users, devices, applications, network access, identity sources, posture checks, segmentation, deployment model, integrations, and enforcement locations.

Separate workplace network access control from remote application access, then define identity and posture requirements for employees, contractors, guests, unmanaged devices and IoT. The policy model must be practical to operate and audit, with resilience for sites affected by WAN or cloud disruption. Use the platform comparison to assess access scope, policy model, identity, posture, enforcement, and estate fit.

How do HPE, Cisco, Juniper, and Fortinet secure access platforms compare?

The platforms differ in NAC architecture, cloud delivery, network integration, device profiling, segmentation, ZTNA, endpoint telemetry, and multivendor support.

HPE Aruba Networking ClearPass focuses on multivendor NAC and onboarding, Cisco Identity Services Engine on policy, profiling and segmentation, Juniper Mist Access Assurance on cloud-native NAC with site survivability, and Fortinet on linking NAC, telemetry and ZTNA. Use the vendor comparison to compare HPE, Cisco, Juniper, and Fortinet by NAC, ZTNA, identity, and network integration.

How does zero-trust access affect onboarding, segmentation, and support workload?

It can automate appropriate access and reduce lateral movement, but policy design, endpoint readiness, exception handling, and user communication determine operational success.

Identity and device context can place users and endpoints into the correct role without relying on static VLANs, improving segmentation and responsiveness. However, certificate deployment, guest onboarding, legacy exceptions and weak diagnostics can increase service desk demand unless policies are tested and enforced in stages.

Can zero-trust access replace traditional VPN and network access control?

It can replace some broad VPN and static access models, but legacy protocols, unmanaged devices, site access, and emergency workflows may require coexistence.

ZTNA suits application-specific remote access, while NAC still matters for devices connecting to wired and wireless networks and for controlled administrative access. Older applications and operational systems may still need VPN during transition, so dependencies and break-glass procedures should be defined before cutover.

Can you support mixed-vendor identity, endpoint, and network access environments?

Yes, mixed-vendor access can work when identity attributes, device posture, RADIUS or TACACS flows, policy ownership, enforcement, and logging are aligned.

Assessments should confirm protocol support, available policy attributes, posture update timing, and how policies behave across each hardware family. Logging also needs to preserve user, device, policy and enforcement context so faults can be traced across identity, access control, routing and security. For NAC, ZTNA, identity integration, or phased access-policy deployment, speak to our secure access experts before enforcing the design.

What identity, posture, resilience, and protocol requirements should a secure access platform meet?

Specify identity sources, MFA, certificates, posture signals, device profiling, access protocols, policy scale, local survivability, audit logging, APIs, and high availability.

Document authentication methods such as 802.1X, MAB, RADIUS, TACACS+, SAML, OIDC and certificate-based access, then confirm how posture signals are collected and updated. Resilience should cover redundant policy nodes, local authentication, identity-provider outages and searchable audit logs with governance and API support.

Get expert advice, with no obligation.

From new deployments to hardware refreshes and network reviews, our specialists can help you identify what needs to change and how to move forward with confidence.
A group discussing IT solutions