How do I allow VPN clients into ISA 2004 to access HTTPS sites? When my VPN users come into our network on our ISA 2004 firewall, they can hit HTTP web sites but not HTTPS. For instance, If I'm VPN'd in to my network and go to my bank's web site, there's no problem hitting the home page. But, when I go to log in, I get a Page Cannot be Displayed error. This holds true for any https login on any site.