From a terminal, run: sudo make-cadir /etc/openvpn/easy-rsa This will ensure that any changes to the scripts will not be lost when the package is updated. To setup your own Certificate Authority (CA) and generate certificates and keys for an OpenVPN server and multiple clients first copy the easy-rsa directory to /etc/openvpn.

OpenVPN supports bidirectional authentication based on certificates, meaning that the client must authenticate the server certificate and the server must authenticate the client certificate before mutual trust is established.īoth server and client will authenticate the other by first verifying that the presented certificate was signed by the master certificate authority (CA), and then by testing information in the now-authenticated certificate header, such as the certificate common name or certificate type (client or server). The PKI consists of:Ī separate certificate (also known as a public key) and private key for the server and each client.Ī master Certificate Authority (CA) certificate and key, used to sign the server and client certificates. The first step in building an OpenVPN configuration is to establish a PKI (public key infrastructure). To install openvpn in a terminal enter: sudo apt install openvpn easy-rsa VPN client implementations are available for almost anything including all Linux distributions, macOS, Windows and OpenWRT-based WLAN routers. The port number can be configured as well, but port 1194 is the official one this single port is used for all communication. OpenVPN can be used in a routed or bridged VPN mode and can be configured to use either UDP or TCP. If you want more than just pre-shared keys OpenVPN makes it easy to set up a Public Key Infrastructure (PKI) to use SSL/TLS certificates for authentication and key exchange between the VPN server and clients. This chapter will cover installing and configuring OpenVPN to create a VPN. It belongs to the family of SSL/TLS VPN stacks (different from IPSec VPNs). OpenVPN is a Virtual Private Networking (VPN) solution provided in the Ubuntu Repositories. Multi-node configuration with Docker-Composeĭistributed Replicated Block Device (DRBD)

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