[Freeswitch-users] Proxy authentication on REFER

Woof! Using an event socket on an answered parked call, I am trying to use "deflect" to transfer the call off of FreeSwitch to a SIP destination, like this: sendmsg call-command: execute execute-app-name: deflect execute-app-arg: sip:200@cdhcp151.pingtel.com Alas, our proxy will challenge the REFER that Sofia generates with a "407 Proxy Authentication Required". Currently, Sofia logs an error message sofia_reg_handle_sip_r_challenge() No Matching gateway found And then FS closes the event socket (leaving the orignal call in limbo, btw). I'm at a loss as to where to configure the needed username and shared secret so Sofia can respond to this challenge. Some clues appreciated! --Woof!