Of course:
I install OpenVPN on my Odroid C1+ typing (without update and upgrade):
pacman -Sy openvpn
then copy the certificates, the key and config files (eg. from an USB pendrive) in /etc/openvpn with:
cp ca.crt /etc/openvpn
cp client.crt /etc/openvpn
cp client.key /etc/openvpn
cp client.ovpn /etc/openvpn
then return on master directory and type:
groupadd nogroup
-Then to connect to the server typing:
cd /etc/openvpn
and then:
openvpn --config client.ovpn
And the Client connect to the server immediately
To install the Server I followed this guide and it works by another Odroid C1+ with Debian OS to permit a client to reach it on a static IP address at home (portworwarding on private IP server address) and to permit at a client (eg. an android device) to see other clients (Arch OS, windows OS, etc.):
https://www.youtube.com/watch?v=Y1RSNZxRG8cand if You like it click on "I like"
THANX SO MUCH at my friend Alexis82