View difference between Paste ID: CxaH6z49 and PuUS6tqS

 #!/bin/bash
 REMOTE_HOST=1.2.3.4
 REMOTE_COMMAND="ifconfig tun0 10.1.0.1 pointopoint 10.1.0.2 netmask 255.255.255.0; iptables -t nat -F POSTROUTING; iptables -t nat -A POSTROUTING -j MASQUERADE"
 
 LOGGER=$(which logger)
 if [ ! -x $LOGGER ]; then
         echo "logger not installed"
         exit 1
 fi
 do_msg() {
         echo "${0}: ${1}"
         $LOGGER "${0}: ${1}" > /dev/null 2>&1
 }
 do_abort() {
         do_msg $1
         exit 1
 }
 case "${1}" in
         start)
                 ssh -vv \
                         -o PermitLocalCommand=yes \
                         -o LocalCommand="${0} dolocal" \
                         -o ServerAliveInterval=60 \
                         -w 0:0 root@$REMOTE_HOST \
                           '$REMOTE_COMMAND'
                 ;;
         dolocal)
-                OLD_DEFAULT_GW=$(ip route| egrep default | egrep -o "([12345678900]{1,3}\.*){4}")
+                OLD_DEFAULT_GW=$(ip route| sed -rn 's/default via ([^ ]+).*/\1/p'")
                 ifconfig tun0 10.1.0.2 pointopoint 10.1.0.1 netmask 255.255.255.0
                 route add -host $REMOTE_HOST gw ${OLD_DEFAULT_GW} dev wlan0
                 route add default gw 10.1.0.1 dev tun0
                 route del default gw ${OLD_DEFAULT_GW} wlan0
                 /etc/firewall/firewall.sh start
                 ;;
         stop)
 		# call script to restart inet facing interfaces to reset default routes etc
                 ;;
 esac
 exit 0