The SSL VPN portal provides a message to remind users to install the Cisco AnyConnect Secure Mobility Client software to connect to the SSL VPN server. You can find the software installers from the CD that is packed with the device or download the software installers from Cisco.com. See Installing Cisco AnyConnect Secure Mobility Client.
You can access the SSL VPN portal via a web browser from the WAN side by using the HTTPS protocol. You must first enable the SSL VPN feature on the security appliance and then enter the entire address pair “Gateway IP address:Gateway port number” in the address bar to access the SSL VPN portal.