Stuff

#! /bin/sh
# tunnel This script starts ip tunneling...
#
# chkconfig 23457 01 99
# description: Starts and stops tunneling. \

TUNDEVICE=sf
LOCAL_HOST=blablabla
REMOTE_HOST=blablabla
TUNDEV_LOCAL_IP=blablabla
TUNDEV_PTP_IP=blablabla
REMOTE_NET=blablabla

case "$1" in
    start)
echo -n "Starting tunnel for $TUNDEVICE..."
/sbin/modprobe ip_gre
/sbin/ip tunl add $TUNDEVICE mode gre remote $REMOTE_HOST local $LOCAL_HOST ttl 32
/sbin/ifconfig $TUNDEVICE $TUNDEV_LOCAL_IP pointopoint $TUNDEV_PTP_IP
/sbin/route add -net $REMOTE_NET dev $TUNDEVICE
echo "done."
    ;;

    stop)
echo -n "Stopping ip tunneling for $TUNDEVICE..."
/sbin/route del -net $REMOTE_NET dev $TUNDEVICE
/sbin/ifconfig $TUNDEVICE down
/sbin/ip tunl del $TUNDEVICE
/sbin/rmmod ip_gre
echo "done."
    ;;

    restart)
        $0 stop
        $0 start
    ;;
    *)
        echo "Usage $1 (start|stop|restart)"
        exit 1
esac
exit 0