I haven't specifically tested this but a META refresh tag should do the trick:
<HTML>
<HEAD>
<title>Parallelspace Corporation - Redirect</TITLE>
<META http-equiv="refresh" content="0; url=http://myserver:8081/">
</HEAD>
<BODY>
Redirecting to <a href="http://myserver:8081/">http://myserver:8081/</a>
</BODY>
</HTML>
Add this as a "default.htm" web page to any of your web servers and direct people to use the web page's URL. This will automatically redirect their browser to load http://myserver:8081/.