@georgeman:
Easiest way to shape incoming OpenVPN is to assign the appropriate queue on the allow rule on the WAN interface. The whole tunnel will be shaped
Thank you for your time @georgeman!
I believe that you can't shape incoming openVPN traffic because the traffic has already hit the WAN and won't be processed further, but, I've read somewhere that the outgoing traffic could be shaped because the state created early.
Anyway, with only this rule I couldn't shape the traffic inside the tunnel, I believe that I would need to create rules to the openVPN interface as I did.
The attachment show the RRD graph; I believe it's working although I don't have a feedback yet.
Ps.: Why RRD graphs reset every time you change the traffic shape?
rrdVOIP.png
rrdVOIP.png_thumb