Let's say I have two Asterisk boxes, A and B. I am trying to get A to do SIP registration on B, so an extension for A can dial SIP phones covered by B. If I examine the logs on B, if the registration succeeds, I am seeing a notice to that effect on B. But if the registration *fails*, i'm not seeing any message logged on B. Maybe I'm just not looking in the right place. Is there a way to turn on logging or debugging so registration failures are logged on the "target"? I'm doing something profoundly stupid, and seeing the notorious chan_sip.c:12009 handle_response_invite: Failed to authenticate on INVITE message, and trying to trace why. -Thanks, Jim