#!/bin/sh
EXTERNAL_INTERFACE=ppp0
# EXTERNAL_INTERFACE=eth1
IFCONFIG=/sbin/ifconfig

EXTERNAL_IP_ADDRESS=`$IFCONFIG $EXTERNAL_INTERFACE | grep "inet addr" | cut -d: -f2 | awk '{ print $1}'`

echo $EXTERNAL_IP_ADDRESS

# route del default
# route add default gw $EXTERNAL_IP_ADDRESS