The SSL VPN Client downloads a small client to the remote workstation and allows full, secure access to the resources on the internal corporate network. The SVC can be downloaded permanently to the remote station, or it can be removed after the secure session ends.
Clientless SSL VPN can be configured on the Cisco VPN Concentrator 3000 and specific Cisco IOS? routers with Version 12.4(6)T and higher. Clientless SSL VPN access can also be configured on the Cisco ASA at the Command Line Interface (CLI) or with the Adaptive Security Device Manager (ASDM). The ASDM usage makes configurations more straightforward.
Clientless SSL VPN and ASDM must not be enabled on the same ASA interface. It is possible for the two technologies to coexist on the same interface if changes are made to the port numbers. It is highly recommended that ASDM is enabled on the inside interface, so WebVPN can be enabled on the outside interface.