Zero Trust & Cloud SecurityZero Trust & Cloud Security

VPN-less Zero Trust
Cloud Security Architecture

Built for the era of remote work and cloud — only verified users reach the resources they need, regardless of location or device.

Related Products
ZscalerZscaler FortinetFortinet GeniansGenians

Why Zero Trust & Cloud Security, now?

As remote and mobile work became permanent and core systems moved to SaaS and public cloud, the traditional perimeter security model reached its limits. Opening the entire internal network through a VPN means a single stolen credential can expose the whole enterprise — and in practice, many ransomware and supply-chain attacks begin with VPN vulnerabilities and excessive internal access.

Zero Trust is built on the principle that "no one is trusted automatically, regardless of network location." It verifies users, devices and applications continuously and connects them only with least privilege. Expernet realizes an end-to-end Zero Trust architecture with Zscaler SSE (ZPA·ZIA·ZDX) for user-to-application connectivity, Genians NAC for device trust, and Fortinet FortiSASE for branch and remote access security.

Zero Trust is not completed in one step — it is a journey of staged maturity. Expernet supports the roadmap of asset visibility → strengthened authentication → least-privilege access → micro-segmentation, with practical designs that account for local compliance and your existing investments.

We implement Zero Trust step by step

Zero Trust isn't completed at once. Expernet proposes a staged roadmap tailored to where you are today.

Step 1
Asset Visibility

Identify and classify every device and ID with NAC·DDI. Knowing "what connects" is the starting point of Zero Trust.

Genians NAC · Infoblox
Step 2
Strengthened Authentication

Apply MFA·SSO and conditional access to eliminate breaches caused by stolen passwords.

Zscaler ZPA · Genians ZTNA
Step 3
Least-Privilege Access (ZTNA)

Remove VPN tunnels and apply per-application least-privilege access, eliminating full internal-network exposure.

Zscaler ZPA · Fortinet FortiSASE
Step 4
Micro-segmentation

Segment East-West traffic to block the spread of internal breaches.

Fortinet · Genians

Core Solution Components

Zscaler Zero Trust Exchange ZTNA · SASE · CASB · DLP

Zscaler Zero Trust Exchange

An SSE platform built on the world's largest security cloud. ZPA (Zero Trust Private Access) connects to internal apps without a VPN, while ZIA (Internet Access) inspects all internet traffic in the cloud.

  • ZPA — direct app connection, no full internal exposure
  • ZIA — integrated SWG·CASB·DLP·sandbox
  • ZDX — real-time digital experience monitoring
  • Zscaler Premier Partner — highest certified tier
View product details →
Outcomes
99%
Remote-access availability after retiring VPN
60%
Lower network security operating cost
<2s
Access latency across 150+ global PoPs
Fortinet FortiSASE SASE · SD-WAN · ZTNA

Fortinet FortiSASE

A FortiGate-based SASE platform that unifies on-premises SD-WAN security and cloud SASE under one OS (FortiOS). Transition to SASE while reusing your existing Fortinet investment.

  • FortiSASE — cloud-delivered SWG·CASB·ZTNA
  • Managed from the same console as existing FortiGate SD-WAN
  • Real-time FortiGuard AI threat intelligence
  • Hybrid (on-prem + cloud) architecture support
View product details →
Outcomes
One OS
Unified on-prem + cloud management with FortiOS
40%↓
Fewer security appliances after SASE transition
Instant
Real-time FortiGuard threat intelligence
Genians ZTNA ZTNA · NAC · Compliance

Genians ZTNA

Zero Trust network access optimized for local environments. It applies dynamic access policy based on context — device posture, user ID, location and time — with strengths in public-sector and financial compliance.

  • Context-based dynamic access control
  • Allow connection only after device posture checks
  • Many public-sector and financial references
  • Agentless approach supports BYOD environments
View product details →
Outcomes
100%
Automatic device discovery & classification
Agentless
Applied instantly with no infra changes
Compliance
Meets ISMS-P / network-separation requirements

Business Impact

The outcomes you can expect from a Zero Trust transition.

99%
Remote-access availability after retiring VPN
Zscaler ZPA connects to internal apps without a VPN — ultra-low latency across 150+ global PoPs.
60%
Lower security operating cost
40% fewer on-prem appliances with unified cloud management.
100%
Automatic device discovery
Genians NAC agentless approach — applied with no infra changes.
<2s
Global access latency
SSE cloud acceleration across Zscaler's 150+ PoPs.
ISMS-P
Compliance ready
Addresses financial/public network-separation and ISMS-P requirements.
SASE (Secure Access Service Edge) combines SD-WAN (networking) and SSE (security). SSE (Security Service Edge) delivers only the security functions (SWG·CASB·ZTNA) from the cloud, without SD-WAN. Organizations that already have SD-WAN can adopt just SSE.
With a staged approach, Step 1 (device visibility) can start in 2–4 weeks and Step 2 (ZTNA) in 4–8 weeks. A full enterprise rollout takes 6–18 months, but we recommend applying it to critical systems first for quick, visible results.
Depending on ZTNA maturity, most remote-access scenarios can be handled without a VPN. Some systems requiring legacy protocols may warrant phased parallel operation. Expernet offers a free VPN-to-ZTNA migration PoC.
Both Zscaler and Fortinet FortiSASE manage on-prem and cloud traffic from a single policy console. The same policy automatically applies to cloud apps such as Microsoft 365 and Salesforce.
Yes. Zscaler uses a per-user subscription model that scales from small deployments, and Genians ZTNA is well-suited to SMBs. Expernet proposes a configuration matched to your scale.

Start your Zero Trust transition today

We assess your current security environment in detail and propose a free, strategic roadmap for a staged Zero Trust implementation.