vpn tools for mac osx, origin from http://hongjiang.info/mac-vpn-connection-script/

vpn.sh

#!/bin/bash

PROG_NAME=$0
ACTION=$1

DOMAIN="vpnplease.com"
declare -a OPTION=("jp" "us" "sg")

usage() {
  echo "Usage: $PROG_NAME {test|conn|close|status}"
  exit 1
}

vpn_test() {

  for c in "${OPTION[@]}";do
    for i in `seq 1 3`; do
      proxy="$c$i.$DOMAIN"
      ping -c3 $proxy 2>/dev/null | tail -1 | cut -d'=' -f2 | cut -d'/' -f2 | xargs -I {} echo "$proxy " {} 2>/dev/null &
    done
  done

  children=$(jobs -p | xargs)
  trap 'kill $children >/dev/null 2>&1' SIGINT SIGTERM
  wait
}

get_fastest() {
  vpn_test 2>/dev/null | sort -nk2 | head -1 | awk '{print $1}'
}

vpn_status() {
  for c in "${OPTION[@]}";do
    for i in `seq 1 3`; do
      proxy="$c$i.$DOMAIN"
      scutil --nc status $proxy 2>/dev/null | head -1 | xargs -I {} echo "$proxy " {}
    done
  done
}

vpn_connect() {
  local name=$1

/usr/bin/env osascript <<-EOF
  tell application "System Events"
    tell current location of network preferences
      set VPN to service "$name" -- your VPN name here
      if exists VPN then connect VPN
      repeat while (current configuration of VPN is not connected)
        delay 1
      end repeat
    end tell
  end tell
EOF
}

vpn_disconnect() {
  local name=$(vpn_status | awk '$2~/Connected/{print $1}')
  [ -z $name ] && return 0

/usr/bin/env osascript <<-EOF
  tell application "System Events"
    tell current location of network preferences
      set VPN to service "$name" -- your VPN name here
      if exists VPN then disconnect VPN
    end tell
  end tell
  return
EOF
}

case "$ACTION" in
    test)
        vpn_test
    ;;
    conn)
        vpn_connect $(get_fastest)
    ;;
    close)
        vpn_disconnect
    ;;
    status)
        vpn_status
    ;;
    *)
        usage
    ;;
esac