diff --git a/openbsc/src/bsc_mgcp.c b/openbsc/src/bsc_mgcp.c
index 4ebf6c8..bb27d56 100644
--- a/openbsc/src/bsc_mgcp.c
+++ b/openbsc/src/bsc_mgcp.c
@@ -234,6 +234,10 @@
 		return -1;
 	}
 
+	/* do not forward aynthing... maybe there is a packet from the bts */
+	if (endp->ci == CI_UNUSED)
+		return -1;
+
 	/*
 	 * Figure out where to forward it to. This code assumes that we
 	 * have received the Connection Modify and know who is a legitimate
@@ -635,6 +639,8 @@
 	}
 	MSG_TOKENIZE_END
 
+	/* initialize */
+	endp->rtp = endp->rtcp = endp->bts_rtp = endp->bts_rtcp = 0;
 
 	/* bind to the port now */
 	endp->rtp_port = rtp_calculate_port(ENDPOINT_NUMBER(endp), rtp_base_port);
@@ -800,6 +806,8 @@
 		bsc_unregister_fd(&endp->local_rtcp);
 	}
 
+	endp->rtp = endp->rtcp = endp->bts_rtp = endp->bts_rtcp = 0;
+
 	return send_response(250, "DLCX", trans_id, source);
 
 error: