--- channels/chan_sip.c.orig	2004-04-20 10:34:06.000000000 +0100
+++ channels/chan_sip.c	2004-04-20 16:57:43.000000000 +0100
@@ -3689,7 +3689,7 @@
 {
 	int res = -1;
 	/* Always OK if no secret */
-	if (!strlen(secret) && !strlen(md5secret))
+//	if (!strlen(secret) && !strlen(md5secret))
 		return 0;
 	if (ignore && strlen(randdata) && !strlen(get_header(req, "Proxy-Authorization"))) {
 		/* This is a retransmitted invite/register/etc, don't reconstruct authentication