Modernizing Enterprise Wireless Access with Secure Authentication and BYOD Onboarding
Customer Overview
Our customer is a financial services organization with approximately 200 employees operating across five office locations. As the organization continued to modernize its workplace, it required a secure wireless solution that could provide seamless access for corporate users while supporting employee-owned devices and guest connectivity without compromising security or regulatory compliance.
To meet these requirements, our team designed and implemented an identity-driven wireless access solution that eliminated shared passwords, streamlined device onboarding, and enforced role-based network access.
Business Challenge
The customer’s existing wireless environment relied on shared pre-shared keys (PSKs) and multiple SSIDs to support different user groups. This approach created security risks, increased administrative overhead, and made compliance more difficult.
Shared passwords could not be individually managed or revoked, while maintaining multiple wireless networks complicated day-to-day operations. The organization also lacked a secure process for onboarding personal devices and managing guest access.
The customer required a modern solution that would:
- Eliminate shared wireless passwords.
- Provide secure certificate-based authentication for corporate devices.
- Enable employees to securely onboard personal devices.
- Isolate BYOD and guest traffic from corporate resources.
- Simplify guest access through a sponsor approval process.
- Improve overall security while delivering a seamless user experience.
The Solution
As the customer’s Managed Services Provider (MSP), we designed and implemented a secure enterprise wireless access solution based on identity, device trust, and automated policy enforcement.
The solution leveraged IEEE 802.1X authentication with EAP-TLS certificates for corporate-managed devices, automated BYOD onboarding integrated with Microsoft Intune, and a self-service guest portal with sponsor approval.
Cisco Identity Services Engine (ISE) served as the centralized policy platform, providing authentication services, dynamic VLAN assignment, and guest lifecycle management.
Secure Corporate Wireless Access
Corporate-issued Windows, macOS, and mobile devices were configured to authenticate using 802.1X with EAP-TLS machine certificates issued through Azure Cloud PKI.
This certificate-based approach eliminated the need for shared wireless passwords while providing strong mutual authentication between client devices and the wireless infrastructure.
Employees experienced seamless connectivity, while IT gained centralized control over network access and the ability to revoke access by removing device certificates rather than changing network credentials.
Secure BYOD Onboarding
To support employee-owned devices without exposing internal corporate resources, a secure self-service BYOD onboarding process was implemented.
Employees initially connected to a dedicated onboarding wireless network and authenticated using their corporate credentials. Devices were then enrolled into Microsoft Intune, where they received an Azure Cloud PKI-issued certificate.
Once enrollment was complete, devices automatically reconnected using 802.1X and EAP-TLS authentication.
Rather than receiving unrestricted corporate access, BYOD devices were automatically assigned to an Internet-only network, providing secure Internet connectivity while maintaining complete isolation from sensitive business systems.
This approach balanced user convenience with strong security controls and reduced operational effort through automation.
Secure Guest Access
Guest connectivity was simplified through a self-service portal managed by Cisco Identity Services Engine.
Visitors registered through the guest portal and selected their host from a predefined sponsor directory. The designated sponsor received an email requesting approval or denial of the guest request.
Once approved, guests received Internet-only access that automatically expired after one day, eliminating the need for manual account management while ensuring temporary access remained tightly controlled.
This automated workflow improved the visitor experience while maintaining security and accountability.
Policy-Based Network Access
Cisco Identity Services Engine provided centralized policy enforcement across the wireless environment.
Based on user identity and device type, ISE dynamically assigned the appropriate VLAN, ensuring that:
- Corporate-managed devices received authorized access to internal business resources.
- BYOD devices were restricted to Internet-only connectivity.
- Guest users were isolated from corporate networks and granted temporary Internet access only.
Dynamic policy assignment eliminated the need for multiple static wireless configurations while simplifying ongoing administration.
Business Outcomes
The new wireless access solution delivered a secure, scalable, and user-friendly experience across all five locations.
Improved Security
Replacing shared pre-shared keys with certificate-based 802.1X authentication significantly strengthened wireless security while reducing the risk of unauthorized network access.
Elimination of Shared Passwords
The organization completely removed shared wireless credentials, improving compliance and simplifying credential management.
Secure BYOD Access
Employees could securely register personal devices through an automated onboarding workflow while maintaining complete separation between personal devices and corporate resources.
Simplified Guest Experience
The automated sponsor approval process enabled fast, secure guest access without requiring IT intervention, while enforcing temporary Internet-only connectivity.
Simplified Network Management
Centralized authentication and dynamic policy enforcement reduced administrative overhead and provided a consistent access experience across all office locations.
Technologies Implemented
- Enterprise Wireless Infrastructure
- IEEE 802.1X Authentication
- EAP-TLS Certificate Authentication
- Azure Cloud PKI
- Microsoft Intune
- Cisco Identity Services Engine (ISE)
- Dynamic VLAN Assignment
- Self-Service BYOD Onboarding
- Guest Portal with Sponsor Approval
- Internet-Only Guest and BYOD Segmentation
Conclusion
By replacing legacy password-based wireless access with a modern identity-driven solution, the customer significantly improved security, simplified network administration, and enhanced the user experience for employees, personal devices, and guests. The combination of certificate-based authentication, automated Microsoft Intune enrollment, centralized policy enforcement, and secure guest workflows created a scalable wireless access architecture aligned with the organization’s security and compliance objectives while supporting future growth.