Apache reverse proxy using VPS and OpenVPN

digraph G{
rankdir=LR;
homeLan[label="Home LAN"];
internet[label="Internet"];
router[label="Router/AP"];
VPS[label="VPS"];
homeLan -> router [dir=none];
router -> VPS [color=red,penwidth=3.0,label=OpenVPN,labelloc=t, dir=both];
router -> internet [dir=forward];
VPS -> internet [dir=none];
}