Tunnel Mode (An圜onnect Secure Mobility Client) - Full tunnel client mode offers extensive application support through its dynamically downloaded Cisco An圜onnect VPN Client (next-generation SSL VPN Client) for SSL VPN.Thin Client (port-forwarding Java applet) - Thin client mode extends the capability of the cryptographic functions of the web browser to enable remote access to TCP-based applications such as Post Office Protocol version 3 (POP3), Simple Mail Transfer Protocol (SMTP), Internet Message Access protocol (IMAP), Telnet and Secure Shell (SSH).This mode is useful for accessing most content that you would expect to access in a web browser such as Internet access, web-based intranet, webmail etc. Clientless - Clientless mode provides secure access to private web resources and will provide access to web content.Web SSL VPN delivers the following three modes of SSL VPN access: This article extends the topic by covering the installation and configuration of Cisco’s SSL An圜onnect VPN for Cisco IOS Routers. Our Web SSL VPN article written back in 2011 introduced this new wave of VPN services.