OpenVPN has been battle-tested for over twenty years and has undergone multiple independent security audits. Its mature codebase, extensive documentation, and massive community make it the most trusted VPN protocol for mission-critical deployments. OpenVPN supports a vast range of cipher suites, authentication methods, and transport options, giving you unmatched flexibility in configuring your VPN.
Unlike newer protocols, OpenVPN can operate over both UDP and TCP, making it capable of bypassing even the most restrictive firewalls. When running over TCP port 443, OpenVPN traffic is virtually indistinguishable from regular HTTPS traffic, making it resistant to deep packet inspection and VPN blocking. This versatility makes OpenVPN the protocol of choice in censored environments.
OpenVPN also offers features that newer protocols lack, including certificate-based authentication, LDAP and Active Directory integration, and granular access control lists. For enterprise deployments that require complex authentication and authorization, OpenVPN provides the infrastructure to implement your exact security policy.