diff --git a/openbsc/src/nat/bsc_nat.c b/openbsc/src/nat/bsc_nat.c
index fe53f49..9bfa54e 100644
--- a/openbsc/src/nat/bsc_nat.c
+++ b/openbsc/src/nat/bsc_nat.c
@@ -574,6 +574,7 @@
 
 static int forward_sccp_to_msc(struct bsc_connection *bsc, struct msgb *msg)
 {
+	int con_type;
 	struct msgb *refuse;
 	struct sccp_connections *con;
 	struct bsc_nat_parsed *parsed;
@@ -605,7 +606,7 @@
 	if (parsed->ipa_proto == IPAC_PROTO_SCCP) {
 		switch (parsed->sccp_type) {
 		case SCCP_MSG_TYPE_CR:
-			if (bsc_nat_filter_sccp_cr(bsc, msg, parsed) != 0)
+			if (bsc_nat_filter_sccp_cr(bsc, msg, parsed, &con_type) != 0)
 				goto exit3;
 			if (create_sccp_src_ref(bsc, msg, parsed) != 0)
 				goto exit2;
diff --git a/openbsc/src/nat/bsc_nat_utils.c b/openbsc/src/nat/bsc_nat_utils.c
index 18fac0c..616e52f 100644
--- a/openbsc/src/nat/bsc_nat_utils.c
+++ b/openbsc/src/nat/bsc_nat_utils.c
@@ -315,13 +315,15 @@
 }
 
 /* Filter out CR data... */
-int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg, struct bsc_nat_parsed *parsed)
+int bsc_nat_filter_sccp_cr(struct bsc_connection *bsc, struct msgb *msg, struct bsc_nat_parsed *parsed, int *con_type)
 {
 	struct tlv_parsed tp;
 	struct gsm48_hdr *hdr48;
 	int hdr48_len;
 	int len;
 
+	*con_type = NAT_CON_TYPE_NONE;
+
 	if (parsed->gsm_type != BSS_MAP_MSG_COMPLETE_LAYER_3) {
 		LOGP(DNAT, LOGL_ERROR,
 		     "Rejecting CR message due wrong GSM Type %d\n", parsed->gsm_type);
@@ -357,15 +359,19 @@
 
 	if (hdr48->proto_discr == GSM48_PDISC_MM &&
 	    hdr48->msg_type == GSM48_MT_MM_LOC_UPD_REQUEST) {
+		*con_type = NAT_CON_TYPE_LU;
 		return _cr_check_loc_upd(bsc, &hdr48->data[0], hdr48_len - sizeof(*hdr48));
 	} else if (hdr48->proto_discr == GSM48_PDISC_MM &&
 		  hdr48->msg_type == GSM48_MT_MM_CM_SERV_REQ) {
+		*con_type = NAT_CON_TYPE_CM_SERV_REQ;
 		return _cr_check_cm_serv_req(bsc, &hdr48->data[0], hdr48_len - sizeof(*hdr48));
 	} else if (hdr48->proto_discr == GSM48_PDISC_RR &&
 		   hdr48->msg_type == GSM48_MT_RR_PAG_RESP) {
+		*con_type = NAT_CON_TYPE_PAG_RESP;
 		return _cr_check_pag_resp(bsc, &hdr48->data[0], hdr48_len - sizeof(*hdr48));
 	} else {
 		/* We only want to filter the above, let other things pass */
+		*con_type = NAT_CON_TYPE_OTHER;
 		return 0;
 	}
 }