I'm installing Google Sitemap on my VPS. It's a newer utility from Google that runs for all the domains on your server rather than doing them one at a time. Anyway, to get into the admin panel for remote administration it requires a secure connection. It sets up a virtual host at port 8181. Can someone give me an idea of what I need to do to create a secure connection to a virtual host without having to purchase a certificate?

It looks like WHM has the ability to do it, but I seem to be too simple minded when it comes to this stuff to figure it out.