--- /home/chan_sip.c	2007-04-24 19:05:06.000000000 +0300
+++ /root/asterisk-1.2.18/channels/chan_sip.c	2007-06-12 20:58:59.000000000 +0300
@@ -10145,6 +10145,20 @@
 				handle_response_invite(p, resp, rest, req, ignore, seqno);
 			} else if (p->registry && sipmethod == SIP_REGISTER) {
 				res = handle_response_register(p, resp, rest, req, ignore, seqno);
+			} else if (sipmethod == SIP_BYE || sipmethod == SIP_REFER) {
+				char *auth, *auth2;
+
+				if (resp == 407) {
+					auth = "Proxy-Authenticate";
+					auth2 = "Proxy-Authorization";
+				} else {
+					auth = "WWW-Authenticate";
+					auth2 = "Authorization";
+				}
+				if ((p->authtries == MAX_AUTHTRIES) || do_proxy_auth(p, req, auth, auth2, sipmethod, 0)) {
+					ast_log(LOG_NOTICE, "Failed to authenticate on %s to '%s'\n", msg, get_header(&p->initreq, "From"));
+					ast_set_flag(p, SIP_NEEDDESTROY);	
+				}
 			} else {
 				ast_log(LOG_WARNING, "Got authentication request (401) on unknown %s to '%s'\n", sip_methods[sipmethod].text, get_header(req, "To"));
 				ast_set_flag(p, SIP_NEEDDESTROY);