Zero Trust Network Access
Identity- and device-posture-aware access that grants least-privilege rights to the specific application, not the entire network. Every request is verified; apps are dark to the internet until a validated session initiates, eliminating the lateral movement risk inherent in flat VPN models.
Overview
VPNs treat users as trusted once they are inside the network perimeter — but that trust-based model is exactly what ransomware, lateral movement, and insider threats exploit. Zero Trust Network Access (ZTNA) replaces VPNs with application-specific, identity-verified access that never exposes the network to the user. Instead of connecting to the corporate network and having access to everything reachable from that network segment, users connect to specific applications — and only those applications — through per-session, just-in-time tunnels that disappear when the session ends.
Clevertek scopes every engagement to your environment — capacity, sites, compliance and support model — so you get a tailored plan rather than a fixed SKU. Pricing is quote-only, and our solutions architects will work through your requirements before any proposal.
Our approach
We deploy ZTNA for enterprises replacing legacy VPNs or adding secure remote access to their architecture. Our deployment starts with an application discovery and access-pattern audit — documenting every application users need, their authentication requirements (SAML/OIDC), and the network segmentation needed behind the ZTNA connector. We configure the ZTNA controller, deploy connectors in your application environments, set up IdP integration, define per-application policies, and onboard users through clientless browser access or lightweight clients. VPN replacement happens in phases — one application at a time.
Why work with us
Application-specific access, not network access
Users connect to applications, not the network. The application remains invisible to discovery scans, lateral movement, and unauthorised access attempts.
Clientless and client-based options
Browser-based access for web applications with no client installation. Lightweight client for TCP/UDP applications that require agent-based connectivity.
Identity-driven per-session authorisation
Every session verified by user identity, device posture, location, and time — not just credentials at login. Policies applied per session, not per user.
Just-in-time ephemeral tunnels
Tunnels provisioned when a user requests access and destroyed when the session ends. No persistent access, no residual attack surface.
IdP integration with MFA
Integrated with Azure AD, Okta, Google Workspace, and any SAML/OIDC identity provider. MFA enforced at every session — including step-up auth for sensitive applications.
Granular audit logging
Every access event logged — user, device, application, session duration, data transferred. Exportable to SIEM for compliance monitoring and threat hunting.
Key benefits
What this solution delivers for your business.
Eliminate lateral movement risk
The network is never exposed to the user. Even a compromised ZTNA session can only reach the specific application authorised — not the surrounding infrastructure.
Replace VPN complexity
No VPN gateway configuration, no split-tunnel management, no certificate provisioning. Users connect through a browser — applications are never exposed to the public internet.
Consistent access for any user location
Same ZTNA experience for office, home, or remote — no per-location VPN profiles, no routing configuration per site. Identity and device posture define access, not location.
Simplified third-party and contractor access
Grant external users access to specific applications through ZTNA without joining them to the domain, deploying an agent, or configuring firewall rules for their IP range.
M&A access standardisation
Bring acquired company users onto the corporate ZTNA platform without redesigning their network or deploying new infrastructure at their sites.
What's included
Part of this managed service.
Application discovery and mapping
Discover and document all applications users need — internal web apps, legacy client-server, database tools — with their authentication and network requirements.
- Application inventory
- Protocol mapping
- Authentication audit
- Network dependency mapping
Clientless browser access
HTTPS applications accessible through a browser with no client software — session recorded, DLP enforced, access logged.
- Browser-based access
- No client installation
- Session recording
- DLP enforcement
Client-based TCP/UDP access
Lightweight client for SSH, RDP, database tools, and any TCP/UDP application that cannot run through a browser.
- Lightweight agent
- TCP/UDP tunnelling
- Split-tunnel or full-tunnel
- Device posture checks
Connector-based application deployment
ZTNA connectors deployed in your application environments for secure, outbound-only connectivity from applications to users.
- Outbound-only connector
- No inbound firewall rules
- Auto-scaling connectors
- Multi-region deployment
IdP and MFA integration
Integrated with any SAML/OIDC identity provider. Step-up authentication configurable per application.
- SAML/OIDC integration
- MFA enforcement
- Step-up authentication
- Device posture verification
Where it helps
Real-world scenarios where this solution delivers measurable outcomes.
VPN replacement
Replace a legacy IPsec or SSL VPN with ZTNA — users get application-specific access through a browser, no VPN client, no full-tunnel hairpinning through the data centre.
Third-party and vendor access
Grant external vendors, auditors, and contractors access to specific internal applications through ZTNA — no domain join, no firewall rules, no permanent VPN accounts.
M&A integration
Quickly onboard acquired company employees onto corporate applications through ZTNA — identity-verified access to specific applications without network integration complexity.
Remote developer access
Developers access source repositories, CI/CD tools, and development environments through ZTNA — application-specific access with session recording and audit logging for compliance.
Questions buyers actually ask
Is ZTNA a VPN replacement?
Yes — and more. VPNs grant network-level access (anything reachable from the VPN IP segment). ZTNA grants application-level access (only the authorised application). ZTNA is more secure and simpler for users.
Do users need a VPN client?
For web applications, no — browser-based access with no client. For TCP/UDP applications like SSH or RDP, a lightweight client is used — typically under 10MB with no admin rights needed for installation.
How does ZTNA handle on-premise applications?
A ZTNA connector is deployed in your data centre or cloud environment. The connector makes an outbound connection to the ZTNA cloud — no inbound firewall rules, no public IP exposure for the application.
Can ZTNA work alongside my existing VPN during migration?
Yes. Applications are migrated to ZTNA one at a time. Users access ZTNA-enabled applications through the browser and continue using VPN for non-migrated applications until the transition completes.
More in SASE & Secure Access
Ready to scope a solution?
Talk to a Clevertek solutions architect about your requirements — no obligation.