The ASA functions as a bidirectional tunnel endpoint. Manage data transfer inbound and outbound as a tunnel endpoint or router.ISAKMP and IPsec accomplish the following: The ASA uses the ISAKMP and IPsec tunneling standards to build and manage tunnels. Each secure connection is called a tunnel. T unneling makes it possible to use a public TCP/IP network, such as the Internet, to create secure connections between remote users and a private corporate network. Information About Tunneling, IPsec, and ISAKMP This chapter describes how to configure Internet Protocol Security ( IPsec) and the Internet Security Association and Key Management Protocol (ISAKMP) standards to build Virtual Private Networks VPNs). Understanding IKEv1 Transform Sets and IKEv2 Proposals.Using the Tunnel-group-map default-group Command.Creating a Certificate Group Matching Rule and Policy.Configuring Certificate Group Matching for IKEv1.Waiting for Active Sessions to Terminate Before Rebooting.Determining an ID Method for IKEv1 and IKEv2 ISAKMP Peers.Licensing Requirements for Remote Access IPsec VPNs.Information About Tunneling, IPsec, and ISAKMP.Configuring an External Server for Security Appliance User Authorization.Configuring Network Secure Event Logging (NSEL).Configuring Logging, SNMP, and Smart Call Home.Configuring An圜onnect VPN Client Connections.Configuring Tunnel Groups, Group Policies, and Users.Configuring the Content Security and Control Application on the CSC SSM.Configuring Advanced Network Protection.Configuring Connection Limits and Timeouts.Configuring Connection Settings and QoS.Configuring Cisco Unified Communications Intercompany Media Engine.Configuring the TLS Proxy for Encrypted Voice Inspection.Information About Cisco Unified Communications Features.Configuring Inspection of Management Application Protocols.Configuring Inspection of Database and Directory Protocols.Configuring Inspection of Voice and Video Protocols.Configuring Inspection of Basic Internet Protocols.Getting Started With Application Layer Protocol Inspection.Configuring Web Cache Services Using WCCP.Configuring AAA Servers and the Local Database.Configuring Special Actions for Application Inspections (Inspection Policy Map).Configuring Service Policies Using the Modular Policy Framework.Configuring Network Address Translation.Configuring the Hostname, Domain Name, Passwords, and Other Basic Settings.Completing Interface Configuration (Transparent Mode).Completing Interface Configuration (Routed Mode).Starting Interface Configuration (ASA 5505).Starting Interface Configuration (ASA 5510 and Higher).Configuring the Transparent or Routed Firewall.Configuring Firewall and Security Context Modes.

Cisco asa 5545 configuration guide