diff --git a/Shorewall-init/install.sh b/Shorewall-init/install.sh
index 90bc88675..3cb3d907e 100755
--- a/Shorewall-init/install.sh
+++ b/Shorewall-init/install.sh
@@ -285,7 +285,12 @@ fi
 if [ -z "$DESTDIR" ]; then
     if [ -n "$first_install" ]; then
 	if [ -n "$DEBIAN" ]; then
-	    ln -sf ../init.d/shorewall-init /etc/rcS.d/S08shorewall-init
+	    if [ -x /sbin/insserv ]; then
+		insserv /etc/init.d/shorewall-init
+	    else
+		ln -sf ../init.d/shorewall-init /etc/rcS.d/S38shorewall-init
+	    fi
+
 	    echo "Shorewall Init will start automatically at boot"
 	else
 	    if [ -x /sbin/insserv -o -x /usr/sbin/insserv ]; then
@@ -319,7 +324,7 @@ else
 		mkdir -p ${DESTDIR}/etc/rcS.d
 	    fi
 
-	    ln -sf ../init.d/shorewall-init ${DESTDIR}/etc/rcS.d/S08shorewall-init
+	    ln -sf ../init.d/shorewall-init ${DESTDIR}/etc/rcS.d/S38shorewall-init
 	    echo "Shorewall Init will start automatically at boot"
 	fi
     fi
diff --git a/Shorewall-lite/install.sh b/Shorewall-lite/install.sh
index 60bab3718..d741f3a59 100755
--- a/Shorewall-lite/install.sh
+++ b/Shorewall-lite/install.sh
@@ -354,7 +354,13 @@ if [ -z "$DESTDIR" ]; then
     if [ -n "$first_install" ]; then
 	if [ -n "$DEBIAN" ]; then
 	    run_install $OWNERSHIP -m 0644 default.debian /etc/default/shorewall-lite
-	    ln -s ../init.d/shorewall-lite /etc/rcS.d/S40shorewall-lite
+
+	    if [ -x /sbin/insserv ]; then
+		insserv /etc/init.d/shorewall-lite
+	    else
+		ln -s ../init.d/shorewall-lite /etc/rcS.d/S40shorewall-lite
+	    fi
+
 	    echo "Shorewall Lite will start automatically at boot"
 	else
 	    if [ -x /sbin/insserv -o -x /usr/sbin/insserv ]; then
diff --git a/Shorewall/install.sh b/Shorewall/install.sh
index 993f11dd0..56e1ec974 100755
--- a/Shorewall/install.sh
+++ b/Shorewall/install.sh
@@ -867,7 +867,13 @@ fi
 if [ -z "$DESTDIR" -a -n "$first_install" -a -z "${CYGWIN}${MAC}" ]; then
     if [ -n "$DEBIAN" ]; then
 	install_file default.debian /etc/default/shorewall 0644
-	ln -s ../init.d/shorewall /etc/rcS.d/S40shorewall
+
+	if [ -x /sbin/insserv ]; then
+	    insserv /etc/init.d/shorewall
+	else
+	    ln -s ../init.d/shorewall /etc/rcS.d/S40shorewall
+	fi
+
 	echo "shorewall will start automatically at boot"
 	echo "Set startup=1 in /etc/default/shorewall to enable"
 	touch /var/log/shorewall-init.log
diff --git a/Shorewall6-lite/install.sh b/Shorewall6-lite/install.sh
index 724f287df..39f27d744 100755
--- a/Shorewall6-lite/install.sh
+++ b/Shorewall6-lite/install.sh
@@ -350,7 +350,13 @@ if [ -z "$DESTDIR" ]; then
     if [ -n "$first_install" ]; then
 	if [ -n "$DEBIAN" ]; then
 	    run_install $OWNERSHIP -m 0644 default.debian /etc/default/shorewall6-lite
-	    ln -s ../init.d/shorewall6-lite /etc/rcS.d/S40shorewall6-lite
+
+	    if [ -x /sbin/insserv ]; then
+		insserv /etc/init.d/shorewall6-lite
+	    else
+		ln -s ../init.d/shorewall6-lite /etc/rcS.d/S40shorewall6-lite
+	    fi
+
 	    echo "Shorewall6 Lite will start automatically at boot"
 	else
 	    if [ -x /sbin/insserv -o -x /usr/sbin/insserv ]; then
diff --git a/Shorewall6/install.sh b/Shorewall6/install.sh
index 942b9a12d..200c34a51 100755
--- a/Shorewall6/install.sh
+++ b/Shorewall6/install.sh
@@ -718,7 +718,13 @@ fi
 if [ -z "$DESTDIR" -a -n "$first_install" -a -z "${CYGWIN}${MAC}" ]; then
     if [ -n "$DEBIAN" ]; then
 	run_install $OWNERSHIP -m 0644 default.debian /etc/default/shorewall6
-	ln -s ../init.d/shorewall6 /etc/rcS.d/S40shorewall6
+
+	if [ -x /sbin/insserv ]; then
+	    insserv /etc/init.d/shorewall6
+	else
+	    ln -s ../init.d/shorewall6 /etc/rcS.d/S40shorewall6
+	fi
+
 	echo "shorewall6 will start automatically at boot"
 	echo "Set startup=1 in /etc/default/shorewall6 to enable"
 	touch /var/log/shorewall6-init.log