--- asterisk/channels/chan_sip.c.orig	2004-10-28 18:33:12.000000000 +0800
+++ asterisk/channels/chan_sip.c	2004-10-28 18:31:10.000000000 +0800
@@ -7179,6 +7179,8 @@
 						transmit_response_reliable(p, "403 Forbidden", req, 1);
 					p->needdestroy = 1;
 				}
+				if (!ignore && p)
+					p->lastinvite = seqno;
 				return 0;
 			}
 			/* Initialize the context if it hasn't been already */