diff --git a/zebra/ipforward_sysctl.c b/zebra/ipforward_sysctl.c
new file mode 100644
index 0000000..828eb86
--- /dev/null
+++ b/zebra/ipforward_sysctl.c
@@ -0,0 +1,146 @@
+/* IP forward control by sysctl function.
+ * Copyright (C) 1997, 1999 Kunihiro Ishiguro
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra 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, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra 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 GNU Zebra; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.  
+ */
+
+#include <zebra.h>
+
+#ifdef NRL
+#include <netinet6/in6.h>
+#endif /* NRL */
+
+#include "log.h"
+
+#define MIB_SIZ 4
+
+/* IPv4 forwarding control MIB. */
+int mib[MIB_SIZ] =
+{
+  CTL_NET,
+  PF_INET,
+  IPPROTO_IP,
+  IPCTL_FORWARDING
+};
+
+int
+ipforward ()
+{
+  int len;
+  int ipforwarding = 0;
+
+  len = sizeof ipforwarding;
+  if (sysctl (mib, MIB_SIZ, &ipforwarding, &len, 0, 0) < 0) 
+    {
+      zlog_warn ("Can't get ipforwarding value");
+      return -1;
+    }
+  return ipforwarding;
+}
+
+int
+ipforward_on ()
+{
+  int len;
+  int ipforwarding = 1;
+
+  len = sizeof ipforwarding;
+  if (sysctl (mib, MIB_SIZ, NULL, NULL, &ipforwarding, len) < 0) 
+    {
+      zlog_warn ("Can't set ipforwarding on");
+      return -1;
+    }
+  return ipforwarding;
+}
+
+int
+ipforward_off ()
+{
+  int len;
+  int ipforwarding = 0;
+
+  len = sizeof ipforwarding;
+  if (sysctl (mib, MIB_SIZ, NULL, NULL, &ipforwarding, len) < 0) 
+    {
+      zlog_warn ("Can't set ipforwarding on");
+      return -1;
+    }
+  return ipforwarding;
+}
+
+#ifdef HAVE_IPV6
+
+/* IPv6 forwarding control MIB. */
+int mib_ipv6[MIB_SIZ] = 
+{
+  CTL_NET,
+  PF_INET6,
+#if defined(KAME) || (defined(__bsdi__) && _BSDI_VERSION >= 199802 ) || defined(NRL)
+  IPPROTO_IPV6,
+  IPV6CTL_FORWARDING
+#else /* NOT KAME */
+  IPPROTO_IP,
+  IP6CTL_FORWARDING
+#endif /* KAME */
+}; 
+
+int
+ipforward_ipv6 ()
+{
+  int len;
+  int ip6forwarding = 0;
+
+  len = sizeof ip6forwarding;
+  if (sysctl (mib_ipv6, MIB_SIZ, &ip6forwarding, &len, 0, 0) < 0) 
+    {
+      zlog_warn ("can't get ip6forwarding value");
+      return -1;
+    }
+  return ip6forwarding;
+}
+
+int
+ipforward_ipv6_on ()
+{
+  int len;
+  int ip6forwarding = 1;
+
+  len = sizeof ip6forwarding;
+  if (sysctl (mib_ipv6, MIB_SIZ, NULL, NULL, &ip6forwarding, len) < 0) 
+    {
+      zlog_warn ("can't get ip6forwarding value");
+      return -1;
+    }
+  return ip6forwarding;
+}
+
+int
+ipforward_ipv6_off ()
+{
+  int len;
+  int ip6forwarding = 0;
+
+  len = sizeof ip6forwarding;
+  if (sysctl (mib_ipv6, MIB_SIZ, NULL, NULL, &ip6forwarding, len) < 0) 
+    {
+      zlog_warn ("can't get ip6forwarding value");
+      return -1;
+    }
+  return ip6forwarding;
+}
+#endif /* HAVE_IPV6 */