client remote bifrost.mib.infn.it ca /etc/openvpn/INFNCertificationAuthority.pem cert /etc/openvpn/usercert.pem key /etc/openvpn/userkey.pem cipher AES-256-CBC comp-lzo yes dev tap proto udp nobind auth-nocache script-security 2 persist-key persist-tun user openvpn group openvpn