1. Securing Enterprise Remote Access
As organizations prepare distributed workforce policies, establishing dedicated, encrypted network tunnels into internal subnets is critical. While legacy PPTP protocols suffer from severe cryptographic flaws, OpenVPN remains the industry benchmark for security, utilizing OpenSSL to provide full TLS-authenticated encryption across UDP and TCP ports.
2. PKI Setup with Easy-RSA
A resilient OpenVPN deployment isolates the Certificate Authority (CA) from the active VPN server. Using Easy-RSA 3, generate a 2048-bit or 4096-bit RSA root authority to sign server certificates, client keys, and Diffie-Hellman parameters.
3. Hardening Server Configuration
Configure /etc/openvpn/server.conf to enforce cipher AES-256-GCM with auth SHA256. Enable tls-crypt to encrypt all TLS handshakes and prevent port scanning detection. Run the daemon under unprivileged user nobody and group nogroup.
4. Client Profile Distribution & Routing
Generate unified .ovpn client configuration bundles containing embedded CA, client cert, private key, and TLS-crypt keys. Configure iptables NAT masquerading to permit forwarded traffic to reach internal subnet servers securely.
