SSH PPP VPN

#!/bin/sh

1. SERVER_HOSTNAME=" gaius -p 22"

test $# -ne 4 && ( echo $0 'start|stop PORT IP NETRANGE' ; exit 1 )

SERVER_HOSTNAME=" $3 -p $2" LOCAL_NET=192.168.240.0/20 REMOTE_NET="$4" SERVER_USERNAME=root

SERVER_IFIPADDR=172.29.29.1 CLIENT_IFIPADDR=172.29.29.3 LOCAL_SSH_OPTS="-P"

PATH=/usr/local/sbin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/bin/X11/:

PPPD=/usr/sbin/pppd SSH=/usr/bin/ssh ROUTE=/sbin/route ADD_FORT="/sbin/sysctl -w net.ipv4.ip_forward=1" DEl_FORT="/sbin/sysctl -w net.ipv4.ip_forward=0" ADD_SNAT="/sbin/iptables -t nat -A POSTROUTING -s $LOCAL_NET -j MASQUERADE -o eth0" DEL_SNAT="/sbin/iptables -t nat -D POSTROUTING -s $LOCAL_NET -j MASQUERADE -o eth0"

if ! test -f $PPPD ; then echo "can't find $PPPD"; exit 3; fi if ! test -f $SSH ; then echo "can't find $SSH"; exit 4; fi

case "$1" in

 start)
    echo -n "Starting vpn to $SERVER_HOSTNAME: "
   ${PPPD} updetach noauth passive pty "${SSH} ${LOCAL_SSH_OPTS} ${SERVER_HOSTNAME} -l${SERVER_USERNAME} -o Batchmode=yes ${PPPD} nodetach notty noauth" ipparam vpn ${CLIENT_IFIPADDR}:${SERVER_IFIPADDR}
    ${SSH} ${LOCAL_SSH_OPTS} ${SERVER_HOSTNAME} -l${SERVER_USERNAME} ${ROUTE} add -net ${LOCAL_NET} gw ${CLIENT_IFIPADDR}
    ${ROUTE} add -net ${REMOTE_NET} gw ${SERVER_IFIPADDR}
    ${SSH} ${LOCAL_SSH_OPTS} ${SERVER_HOSTNAME} -l${SERVER_USERNAME} ${ADD_FORT}
    ${SSH} ${LOCAL_SSH_OPTS} ${SERVER_HOSTNAME} -l${SERVER_USERNAME} ${ADD_SNAT}

   # echo "connected."
   ;;

 stop)
       # echo -n "Stopping vpn to $SERVER_HOSTNAME: "
       ${SSH} ${LOCAL_SSH_OPTS} ${SERVER_HOSTNAME} -l${SERVER_USERNAME} ${DEL_SNAT}
       PID=`ps ax | grep "${SSH} ${LOCAL_SSH_OPTS} ${SERVER_HOSTNAME} -l${SERVER_USERNAME} -o" | grep -v ' passive ' | grep -v 'grep ' | awk '{print $1}'`
       if [ "${PID}" != "" ]; then
         kill $PID
         echo "disconnected."
       else
         echo "Failed to find PID for the connection"
       fi
   ;;

 config)
   echo "SERVER_HOSTNAME=$SERVER_HOSTNAME"
   echo "SERVER_USERNAME=$SERVER_USERNAME"
   echo "SERVER_IFIPADDR=$SERVER_IFIPADDR"
   echo "CLIENT_IFIPADDR=$CLIENT_IFIPADDR"
 ;;