How does openvpn encrypt traffic?

Question

openvpn

Tell me, where to read a detailed manual about the work of Openvpn?
control channel, data encrypt, data decrypt, what encrypts traffic?
Everywhere there are only settings, but how it works is not really.

Answer 1

Still relevant? If yes, then the Control Channel is set very first, this is the TLS channel. It confirms the server / client key, exchanges configuration parameters, exchanges DH and sets the Data Channel, separately from the Control Channel.