Install needed packages:
# apt install --no-install-recommends openvpn openssl
Download easy-rsa v3.0.4 and install it.
# wget --no-check-certificate https://github.com/OpenVPN/easy-rsa/releases/download/v3.0.4/EasyRSA-3.0.4.tgz # tar -xvzf EasyRSA-3.0.4.tgz # rm EasyRSA-3.0.4.tgz # mv EasyRSA-3.0.4/ /etc/openvpn/easy-rsa/
Initialize a new PKI and generate a CA keypair that will be used to sign certificates.
# cd /etc/openvpn/easy-rsa # export EASYRSA=$(pwd) # easyrsa init-pki # easyrsa build-ca nopass
Now build the intermediate certificate.
# ./easyrsa build-server-full server nopass
Once you have generated and signed OpenVPN server certificate, rename the root CA and CA (intermediate) certificates.
# cd /etc/openvpn/easy-rsa/pki/ # mv ca.crt root_ca.crt # mv private/ca.key private/root_ca.key # mv issued/server.crt issued/ca.crt # mv private/server.key private/ca.key
Also move ca.crt to /etc/openvpn/easy-rsa/pki.
# mv /etc/openvpn/easy-rsa/pki/issued/ca.crt /etc/openvpn/easy-rsa/pki
Make sure pki directory has the following rights, otherwise easygateway web interface won't detect the root_ca.crt file (file_exists() php function):
drwxrwx--x 6 root root 4096 Jun 17 16:23 pki
References:
https://wiki.archlinux.org/index.php/Easy-RSA
https://wiki.debian.org/OpenVPN