#!/bin/sh
# Mac OS X NAT script
# Must be run as root, e.g. "sudo startnat en0"
# Francis Devereux 19-Jul-2009

if [ $# -ne 1 ]; then
    cat 1>&2 <<EOF
Usage: $0 <interface>
EOF
    exit 1
fi

INTERFACE=$1

sysctl -w net.inet.ip.forwarding=1
natd -interface $INTERFACE
ipfw add 14201 divert natd ip from any to any via $INTERFACE
ipfw add 14202 pass all from any to any
