Its because its challenging you and you can't answer the challenge... its saying HEY YOU give me a user/pass ... and you can't answer that so it fails.
/b
On Jun 3, 2009, at 10:41 AM, dujinfang wrote:
I had this problem when I gateway to an asterisk box. Each time I call to asterisk through that gateway got a 407 and fail. Never figured out why but guess it's non-proper configuration of Asterisk.