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OpenVPN Setup (Server & Client)

Environment

    VPN Server

    Field Spec or Version CPU QEMU Virtual CPU version 2.5+ (2 Cores) RAM 2G OS Ubuntu 24.04.1 LTS (Noble Numbat) Network interface ens18 with static IP 192.168.3.100/24 DNS 192.168.3.1 (Private DNS Server)

    VPN Client

    Field Spec or Version CPU QEMU Virtual CPU version 2.5+ (2 Cores) RAM 2G OS Ubuntu 24.04.1 LTS (Noble Numbat) Network interface ens18 with static IP 192.168.5.100/24 DNS 192.168.5.1 (Private DNS Server)

    Server - Package Installation

    apt install -y openvpn

    Server - Configuration

      Copy from sample configuration file

      cp /usr/share/doc/openvpn/examples/sample/config-files/server.conf /etc/openvpn/server/server.conf

      Edit the copied file

      port 1194
proto tcp

# Use routing mode instead of bridge mode
dev tun

ca ca.crt
cert example.fake.crt
key example.fake.key
dh dh.pem

topology subnet
server 192.168.7.0 255.255.255.0

# Add route for subnet on server to connected VPN clients
push "route 192.168.3.0 255.255.255.0"
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