[Freeswitch-users] Passthrough sip auth

Hi, Is it possible to have freeswitch pass back the auth challenge (407) it receives from its next hop back to the client contacting freeswitch? And in turn when the client sends the INVITE with digest auth passthrough freeswitch to the next hop for authentication? I'm doing a bridge in the dialplan to the auth gateway when the client calls the freeswitch node. Flow: Client -> Freeswitch -> Auth Gateway Regards, Grant