Article:
  Apache Web-Serving with Mac OS X: Part 1
Subject:   Addendum
Date:   2003-09-28 07:01:59
From:   anonymous2
Response to: Addendum

You have to enable "port forwarding" on your router, and forward any traffic coming in from port 80 (html traffic) to an internal port on your LAN that is pointed at the internal ip your server is running on.