How-to implement a multi-client Site-to-Site VPN with OpenVPN
This technical white paper is an operational guide to implement a multi-client Site-to-Site VPN infrastructure using OpenVPN, a solution renowned for its flexibility and robustness.
Connecting multiple remote sites securely and seamlessly remains a cornerstone of modern enterprise network architecture. This technical white paper by Airbus Protect provides a detailed operational guide to implementing a multi-client Site-to-Site Virtual Private Network (VPN) infrastructure using OpenVPN. Known for its exceptional flexibility, customisability, and cross-platform adaptability, OpenVPN offers a battle-tested framework for enterprise connectivity. The guide explores optimal network configurations, cryptographic parameter tuning, and routing topologies to help security architects build robust, high-availability VPN gateways capable of securely handling multi-tenant communications.
What you will find
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OpenVPN Infrastructure Setup: Step-by-step instructions for establishing scalable, multi-client Site-to-Site topologies using OpenVPN’s server and client configurations.
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Cryptographic & Key Management Best Practices: Guidance on choosing secure encryption algorithms, TLS authentication mechanisms, and certificate authority (CA) structures.
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Routing & Multi-Tenant Isolation: Strategies for managing complex IP address spaces, routing tables, and firewall policies to isolate traffic across remote sites safely.
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Performance Tuning & Resilience: Recommendations for optimising throughput, connection reliability, and failover capabilities across enterprise WAN links.
Authors
Airbus Protect
experts