Zero Trust Network Access (ZTNA)
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Verify every user. Trust no connection by default.
Your people work from everywhere, on managed and unmanaged devices, across dozens of cloud applications. Zero Trust Network Access (ZTNA) gives each user access to exactly what their role requires and nothing more, so your data stays protected no matter where the request comes from.
The VPN was built for a network that no longer exists
VPNs assume a clear line between inside and outside. Get past the perimeter and you are trusted. That model does not hold up now.
Once a VPN authenticates a user, it often grants broad access to the network. If an attacker steals a credential or a compromised device connects, that implicit trust becomes an open door. Lateral movement follows and a single foothold turns into a full breach.
The operational strain makes VPN appliances hard to scale for a distributed workforce. Bring Your Own Device policies introduce endpoints your team never provisioned and remote workers can route around your controls entirely.
With ZTNA in place, your team can
- Grant access based on verified identity and context, never on network location alone
- Enforce least-privilege policies down to the individual application level
- Support BYOD and unmanaged devices without exposing corporate data
- Stop lateral movement by isolating application access from network access
- Deliver consistent, fast connectivity to authorized users anywhere in the world
The GTT ZTNA difference
Identity-verified access, every time
Implicit trust is the flaw at the heart of legacy access. ZTNA closes it by treating every request
as unverified until proven otherwise, whether the user sits in headquarters or a coffee shop
Without GTT
- VPNs grant network access once a user authenticates, then stop checking
- Location determines trust, so remote and on-prem users get different scrutiny
- Stolen credentials open broad access to the network
- Access decisions rely on static rules set at login
With GTT
- Every access request is verified against identity and context before connection
- On-premises and remote requests face the same verification standard
- Compromised credentials reach only the specific application policy allows
- Policies apply continuously at the individual and application level
Results
Access reflects who the user actually is and what their role needs, not where they happen to connect from
No room for lateral movement
A breach becomes a crisis when attackers move freely once inside. ZTNA isolates application
access from network access, so a single compromised endpoint stays contained.
Without GTT
- Perimeter access exposes the wider network to lateral movement
- Publicly visible IP addresses give attackers a target to probe
- One compromised device can reach connected systems across the estate
- Segmentation requires internal firewalls and constant maintenance
With GTT
- Software-defined perimeter isolates each application from the network
- A dark cloud approach shields IP addresses from public discovery
- Users connect to approved resources only, with no path to explore
- Policy-based isolation replaces manual segmentation complexity
Results
An intrusion at one point has nowhere to go. You contain the damage before it spreads.
BYOD and unmanaged devices without the exposure
Personal devices and contractor laptops are part of enterprise reality. The question is whether they
become an entry point for threats. ZTNA lets you say yes to flexibility without handing over your data.
Without GTT
- Unmanaged devices connect to the network with little oversight
- BYOD policies widen the attack surface across every endpoint
- VPN access treats every device as equally trusted once connected
- Contractors and third parties require standing network accounts
With GTT
- Access is granted per application, with identity verified regardless of device
- Corporate data stays isolated from unmanaged and personal devices
- Context-aware policies weigh device posture in every access decision
- Third-party access is scoped tightly and removed just as easily
Results
Your workforce and your partners get the access they need while your data stays out of reach of the devices you do not control.
Native to SASE, not bolted on
Security tools that live in isolation create the sprawl they were meant to solve. GTT delivers ZTNA
as a core component of a unified SASE framework, so protection and connectivity work as one.
Without GTT
- ZTNA layered onto separate VPNs, VDIs and internal firewalls
- Each security tool carries its own policy engine and console
- Scaling access means adding appliances and licenses
- Fragmented tools obscure the full picture of user activity
With GTT
- ZTNA delivered natively within a cloud-based SASE architecture
- Shared policy and visibility across FWaaS, CASB, SWG, DLP and managed SD-WAN
- Cloud-delivered ZTNA scales across every network edge without added complexity
- GTT Envision brings visibility and control together in one platform
Results
One framework governs how users connect and how you protect them, which cuts tool sprawl and gives your security team room to focus on strategy.
Security users do not have to fight
Controls that slow people down get bypassed. ZTNA protects access while keeping the
experience fast and consistent, so security supports productivity instead of competing with it.
Without GTT
- Appliance-based VPNs create bottlenecks under heavy remote load
- Backhauling traffic to a central gateway adds latency
- Access breaks when users move between locations or networks
- Poor experience drives workarounds that undermine policy
With GTT
- Cloud-delivered access removes the choke points that drag performance
- Direct, verified access paths keep the connection quick
- Authorized users get reliable access regardless of where they work
- A smooth experience keeps users inside the controls you set
Results
Your hybrid workforce stays productive and your policies stay intact, because people have no reason to route around them
How it works
GTT delivers ZTNA as a cloud-based service within your SASE framework. No appliances
to procure and no performance penalty for verifying access.
1
Define identity and access policy
We work with your team to map users, roles and the applications each one needs. From that baseline, you set least-privilege policies at the individual and application level, factoring in identity and context. Your access model reflects how your business actually operates.
2
Connect users to applications
ZTNA runs on a software-defined perimeter that isolates specific application access from broader network access. Approved users reach approved resources through a verified path, while everything else stays hidden behind the dark cloud. Public IP addresses stay shielded from discovery.
3
Verify continuously
Every access request faces the same scrutiny, whether it originates on-premises or halfway around the world. Identity and context are checked before each connection, so a change in circumstances triggers a fresh decision rather than a standing pass.
4
Monitor and control
Once live, user access flows through a cloud-delivered inspection layer with full visibility in GTT Envision. You see who is reaching what, spot anomalies early and adjust policy in real time. Predictive analytics and AI-driven orchestration keep your access posture optimized as your business changes.
Why enterprises choose GTT for ZTNA
- Delivered as a native component of GTT’s SASE framework, alongside FWaaS, CASB, DLP, SWG and managed SD-WAN
- Least-privilege access enforced at the individual and application level, not the network perimeter
- Software-defined perimeter and dark cloud architecture that shields IP addresses and blocks lateral movement
- Consistent verification for on-premises and remote access, with the same standard applied everywhere
- Cloud-delivered scale across every network edge, with no appliances to manage
- GTT Envision delivers visibility, orchestration and control across your security services in one platform
- 80% of customer traffic stays on GTT’s top-ranked Tier 1 global backbone for outstanding performance, control and security
- Professional, managed and technical services to support you whenever, wherever and however you need
Discover more in our Cloud Security portfolio
GTT’s SSE services integrates six key security services into a single unified solution:
Secure Web Gateway (SWG)
Provides comprehensive protection for users accessing the internet and SaaS applications. It enforces acceptable use policies, blocks malicious websites and prevents threats like malware and phishing in real time.
Cloud Access Security Broker (CASB)
Discovers and controls the use of SaaS applications. It gives you visibility into shadow IT enforces data loss prevention policies and ensures compliance for both sanctioned and unsanctioned cloud services.
Firewall as a Service (FWaaS)
Delivers next-generation firewall capabilities from the cloud. Engage consistent firewall protection for all users and locations without the need for physical or virtual appliances.
Secure Remote Access
Enables users to safely access enterprise applications from anywhere by verifying identity, enforcing leastprivileged access and applying continuous security controls independent of location.
Data Loss Protection (DLP)
Provides security control that prevents sensitive data from being exposed or exfiltrated by identifying, monitoring and enforcing policies on data across users, devices, applications and networks.
Frequently asked questions
Does ZTNA only apply to remote access?
No, ZTNA applies to both remote and on-premise access; it ensures all access requests are treated with the same level of scrutiny, regardless of location.
How does ZTNA impact user experience and productivity?
When properly implemented, ZTNA can enhance the user experience by allowing secure access from anywhere.
Can ZTNA help prevent data breaches and insider threats?
Yes, ZNTA’s principle of “least privilege access” helps limit the potential damage caused by insiders and external attackers by restricting access to only what is necessary for a user’s role.
Complete your solution
Managed SD-WAN
Transform your WAN with dynamic network traffic management for flexibility, speed, security and cost control.
SASE: Secure Connect
Enable secure and controlled access to applications from anywhere.
Managed Hybrid Cloud
Public cloud flexibility with private cloud confidence, integrating with other clouds across the globe
Cloud Connect
Optimize your business-critical applications and connect to leading Cloud Service Provider
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Secure every connection with GTT
Rely on identity-based, least-privilege access that protects your data and keeps your hybrid workforce moving. Simplify your security by talking to a GTT expert today.