Generate command for forwarding Windows local port to OSX host for accessing OSX hosted web application as localhost

netsh

#!/usr/bin/env bash

# Prints out the Windows netsh command necessary to port forward on localhost to another
# IP address. Especially useful when testing IE11 with APIs like Google Maps that only 
# permit localhost connectivity but the actual server is on your local OSX host machine

# usage:
#    netsh [interface] [port]
#
# e.g.,
#    netsh en0 8080 | pbcopy

set -o nounset
set -o errexit

IFACE=${1:-en0}
PORT=${2:-3000}
IP=$(/sbin/ifconfig $IFACE | grep "inet\b" | cut -d " " -f2)

if [ -z "$IP" ]; then
  echo unable to determine IP address from interface $IFACE
  exit 1
fi

echo netsh interface portproxy add v4tov4 listenport=$PORT listenaddress=127.0.0.1 connectport=$PORT connectaddress=$IP