Changing the base URL for authentication to 443 does not change what ports tomcat listens on. Tomcat by default cannot listen on privileged ports, which means that by changing the base url, we are not changing the listening ports to 80 and 443. Using iptables, a translation can be created to translate incoming traffic from 80 and 443 to 8080 and 8443.
The Novell documentation explains how to do this. Also one point of interest that was not mentioned, was that you must change in tomcat's configuration file, server.xml, the forwarding port for not SSL traffic. By default this is configured to 8443. Instead, change this to 443. This does not change the port tomcat listens on, but non-secure incoming traffic, is automatically forwarded to the SSL port.
I will post configuration shots in my wiki at http://jaredjennings.org
Disclaimer: As with everything else at Cool Solutions, this content is definitely not supported by Novell (so don't even think of calling Support if you try something and it blows up).
It was contributed by a community member and is published "as is." It seems to have worked for at least one person, and might work for you. But please be sure to test, test, test before you do anything drastic with it.