OpenVPN Consulting

Zwiegnet provides advanced OpenVPN expertise — the industry-leading open-source VPN solution for secure remote access and site-to-site connectivity. We design and implement robust, encrypted tunnels that scale from small teams to large enterprises on Linux servers.

Our OpenVPN services include:

• Server & Client Configuration – Full OpenVPN server setups (UDP/TCP), client profiles, routing vs. bridging, and push options for DNS, routes, and policies.
• Certificate & Key Management – PKI with Easy-RSA or OpenSSL, automated client certificate generation/revocation (CRL), and integration with Let’s Encrypt for server certs.
• Authentication Options – Password, certificate, LDAP/Active Directory, PAM, RADIUS, or multi-factor (Google Authenticator, Duo).
• Site-to-Site & Remote Access – Point-to-point tunnels, full-mesh networks, client-to-site for road warriors, and split-tunnel/full-tunnel configurations.
• High Availability & Load Balancing – Multi-server clusters with keepalived/VRRP, sync of certificates/revocation lists, and load-balanced client connections.
• Performance Tuning – Compression, cipher selection (AES-GCM), multi-threaded operation, MTU optimization, and high-throughput configurations.
• Security Hardening – Strong ciphers only, tls-auth/tls-crypt, firewall integration, chroot, privilege drop, and protection against common attacks.
• Integration – With FreeIPA/LDAP for user management, Samba for file access, and monitoring via Prometheus/OpenVPN exporter.
• Mobile & Multi-Platform Clients – Configuration for Windows, macOS, iOS, Android (OpenVPN Connect), and Viscosity/Tunnelblick.
• Troubleshooting & Auditing – Diagnosis of handshake failures, routing issues, certificate errors, and full VPN health/performance checks.

OpenVPN offers unmatched flexibility and security — we ensure your VPN is fast, reliable, and compliant with organizational policies.

Located between Madison and Milwaukee, Wisconsin since 2009 — direct access to experienced OpenVPN engineers with large-scale production deployments.