diff --git a/openbsc/src/nat/bsc_nat.c b/openbsc/src/nat/bsc_nat.c
new file mode 100644
index 0000000..b5ba8ce
--- /dev/null
+++ b/openbsc/src/nat/bsc_nat.c
@@ -0,0 +1,115 @@
+/* BSC Multiplexer/NAT */
+
+/*
+ * (C) 2010 by Holger Hans Peter Freyther <zecke@selfish.org>
+ * (C) 2010 by on-waves.com
+ * All Rights Reserved
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#define _GNU_SOURCE
+#include <getopt.h>
+
+#include <openbsc/debug.h>
+
+static const char *config_file = "openbsc.cfg";
+static char *msc_address = "127.0.0.1";
+static struct in_addr local_addr;
+
+static void print_usage()
+{
+	printf("Usage: bsc_nat\n");
+}
+
+static void print_help()
+{
+	printf("  Some useful help...\n");
+	printf("  -h --help this text\n");
+	printf("  -d option --debug=DRLL:DCC:DMM:DRR:DRSL:DNM enable debugging\n");
+	printf("  -s --disable-color\n");
+	printf("  -c --config-file filename The config file to use.\n");
+	printf("  -m --msc=IP. The address of the MSC.\n");
+	printf("  -l --local=IP. The local address of the MGCP.\n");
+}
+
+static void handle_options(int argc, char** argv)
+{
+	while (1) {
+		int option_index = 0, c;
+		static struct option long_options[] = {
+			{"help", 0, 0, 'h'},
+			{"debug", 1, 0, 'd'},
+			{"config-file", 1, 0, 'c'},
+			{"disable-color", 0, 0, 's'},
+			{"timestamp", 0, 0, 'T'},
+			{"msc", 1, 0, 'm'},
+			{"local", 1, 0, 'l'},
+			{0, 0, 0, 0}
+		};
+
+		c = getopt_long(argc, argv, "hd:sTPc:m:l:",
+				long_options, &option_index);
+		if (c == -1)
+			break;
+
+		switch (c) {
+		case 'h':
+			print_usage();
+			print_help();
+			exit(0);
+		case 's':
+			debug_use_color(0);
+			break;
+		case 'd':
+			debug_parse_category_mask(optarg);
+			break;
+		case 'c':
+			config_file = strdup(optarg);
+			break;
+		case 'T':
+			debug_timestamp(1);
+			break;
+		case 'm':
+			msc_address = strdup(optarg);
+			break;
+		case 'l':
+			inet_aton(optarg, &local_addr);
+			break;
+		default:
+			/* ignore */
+			break;
+		}
+	}
+}
+
+int main(int argc, char** argv)
+{
+	/* parse options */
+	handle_options(argc, argv);
+
+	/* seed the PRNG */
+	srand(time(NULL));
+
+	return 0;
+}