OS X Cisco IPSEC VPN Post-Connection Split-Tunneling Script

vpn_split_tunneling_script.sh

#! /usr/bin/env bash
# per http://www.shadabahmed.com/blog/2013/08/11/split-tunneling-vpn-routing-table/

if (( EUID != 0 )); then
  echo "Please, run this command with sudo" 1>&2
  exit 1
fi
WIRELESS_INTERFACE=en0
TUNNEL_INTERFACE=utun0
GATEWAY=$(netstat -nrf inet | grep default | grep $WIRELESS_INTERFACE | awk '{print $2}')

echo "Resetting routes with gateway => $GATEWAY"
echo
route -n delete default -ifscope $WIRELESS_INTERFACE
route -n delete -net default -interface $TUNNEL_INTERFACE
route -n add -net default $GATEWAY

# custom route add for server behind VPN
# route -nv add -net SERVERIPHERE -interface utun0
for subnet in  10.105
do
  route -n add -net $subnet -interface $TUNNEL_INTERFACE
done