My edits of the Synology VPN reconnection script by aelveborn.

openVPNreconnect

#!/bin/sh

# Replace o1234567890 with your VPN id. To get your id, start the VPN and run: sudo ps aux | grep client_o
# Replace home with the name of your VPN profile in DSM admin panel.
vpnId="o1234567890"
vpnName="home"
vpnProtocol="openvpn"

# You should not need to change the following variables
vpncFile="/usr/syno/etc/synovpnclient/vpnc_connecting"
vpncBin="/usr/syno/bin/synovpnc"

reconnectVPNc () {
    echo conf_id=$vpnId > $vpncFile
    echo conf_name=$vpnName >> $vpncFile
    echo proto=$vpnProtocol >> $vpncFile
    $vpncBin reconnect --protocol=$vpnProtocol --name=$vpnName
}

if echo `ifconfig tun0` | grep -q "00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00"
then
    logger -p 0 -s "VPN is up."
else
    logger -p 0 -s "VPN is down! Trying to reconnect."
    reconnectVPNc
fi

if echo `netstat -rn` | grep -q "tun0"
then
    logger -p 0 -s "VPN route is ok."
else
    logger -p 0 -s "VPN route not found! Reconnecting."
    $vpncBin kill_client --protocol=$vpnProtocol --name=$vpnName
    reconnectVPNc
fi

exit 0