ip

#!/bin/sh
# Shell script scripts to read ip address

OS=`uname`
case $OS in
    Linux)
        IP=`ifconfig  | grep 'inet addr:'| grep -v '127.0.0.1' | cut -d: -f2 | awk '{ print $1}'`
        WANIP=`wget -q -O - checkip.dyndns.org|sed -e 's/.*Current IP Address: //' -e 's/<.*$//'`
        ;;
   FreeBSD|OpenBSD|Darwin)
        IP=`ifconfig en0  | grep -E 'inet.[0-9]' | grep -v '127.0.0.1' | awk '{ print $2}'`
        WANIP=`curl checkip.dyndns.org 2>/dev/null | sed -e 's/.*Current IP Address: //' -e 's/<.*$//'`
        ;;
    *)
        IP="Unknown"
        WANIP="Unknown"
        ;;
esac

echo "LAN: $IP"
echo "WAN: $WANIP"