In this chapter, we are going to learn how to configure a remote-access VPN on the Cisco Adaptive Security Appliance (ASA). A remote-access VPN provides a clientless version where the user accesses the corporate network using a web browser on their end device, such as a personal computer. The other version uses a client-based model. This model employs a VPN client that is installed on the user's end device.

We will discuss the general use of both of these models and how each can be beneficial to an organization. In this chapter, we will cover the following:

• Using a remote-access VPN
• Configuring a clientless remote-access VPN
• Configuring a client-based remote-access VPN
• Verification

Let's begin!