Meeting the Challenge
As you can see, by using direct access and/or access with a portal, an SSL VPN appliance makes client/server applications available to remote users through the Web. SSL VPNs provide companies the flexibility to access their existing legacy application infrastructure without costly application re-development. SSL VPN access techniques can provide access to almost any application on any platform.
Secure Access
Most SSL VPN devices extend these legacy resources to authorized users. This process is implemented by the use of browser-based access to web-based resources using HTTP
reverse-proxy technology. A single point of entry via the SSL VPN gateway provides a unified secure access point into a trusted legacy environment. In many cases, the SSL VPN can provide the authentication process, while still leaving the authorization process to the legacy application.