#! /bin/sh
# simple_server_firewall (Bourne shell script) -- a default-deny firewall with a few exceptions
# Usage: simple_server_firewall <interface>

if [ -z "$1" ] ; then
  echo simple_server_firewall: interface name must be supplied >&2
else
  # can't use --policy INPUT DROP because that affects all interfaces.
  # (and user chains can't have policies, so don't even go there...)


fi