1. Install certbot:
sudo apt install certbot
2. Shudown OpenVPN server command:
sudo systemctl stop openvpnas
3. Install Let’s Encrypt certs multi-line command:
sudo certbot certonly \
--standalone \
--non-interactive \
--agree-tos \
--email EMAIL_ADDRESS \
--domains DOMAIN_NAME \
--pre-hook 'sudo service openvpnas stop' \
--post-hook 'sudo service openvpnas start'
4. Link Let’s Encrypt certs to OpenVPN web certs commands:
sudo ln -s -f /etc/letsencrypt/live/DOMAIN_NAME/cert.pem /usr/local/openvpn_as/etc/web-ssl/server.crt
sudo ln -s -f /etc/letsencrypt/live/DOMAIN_NAME/privkey.pem /usr/local/openvpn_as/etc/web-ssl/server.key
5. Restart OpenVPN service:
sudo systemctl start openvpnas
