Hello barry28,
I found a KnowledgeBase Article on different options you have for password protecting a remote front panel.
http://digital.ni.com/public.nsf/websearch/427FE409FB11575686256DFF0008BBE4?OpenDocument
I'm by no means an html expert, but there might be a way to add html code to the web page that is published that will allow secure login.
Hopefully this helps,
E.Lee
Eric
DE For Life!