I install a freeswitch at this ip address 208.74.66.11. I make as ip call from gizmo (using 17473133317@proxy01.sipphone.com) to 1000@208.74.66.11. I have two question: 1. why freeswitch tried to find user 17473133317@208.74.66.11 ? The phone number belongs to siphone.com, not my freeswitch domain, 2. why it sends challange for 1000@209.74.66.11 ? 2008-05-01 19:13:55 [DEBUG] sofia.c:219 sofia_event_callback() event [nua_i_state] status [407][Proxy Authentication Required] session: n/a 2008-05-01 19:13:56 [WARNING] sofia_reg.c:892 sofia_reg_parse_auth() can't find user [17473133317@208.74.66.11] 2008-05-01 19:13:56 [DEBUG] sofia_reg.c:482 sofia_reg_handle_register() send challange for [1000@208.74.66.11] 2008-05-01 19:13:56 [DEBUG] sofia.c:219 sofia_event_callback() event [nua_i_state] status [403][Forbidden] session: n/a I set <param name="accept-blind-reg" value="false"/> in sofia.conf.xml and sip_profile/default.xml and sip_profile/nat.xml. It doesn't help. Can anyone help ? Thanks, Stanley