![]() In IPsec client-to-LAN connections, the ASA functions only as responder. In IPsec LAN-to-LAN connections, the ASA can function as initiator or responder. These negotiations involve two phases: first, to establish the tunnel (the IKE SA) and second, to govern traffic within the tunnel (the IPsec SA).Ī LAN-to-LAN VPN connects networks in different geographic locations. Because we adhere to VPN industry standards, ASAs can work with other vendors' peers however, we do not support them.ĭuring tunnel establishment, the two peers negotiate security associations that govern authentication, encryption, encapsulation, and key management. For both connection types, the ASA supports only Cisco peers. In IPsec terminology, a peer is a remote-access client or another secure gateway. The ASA uses IPsec for LAN-to-LAN VPN connections and provides the option of using IPsec for client-to-LAN VPN connections. It can also receive encapsulated packets from the public network, unencapsulate them, and send them to their final destination on the private network. It can receive plain packets from the private network, encapsulate them, create a tunnel, and send them to the other end of the tunnel where they are unencapsulated and sent to their final destination. 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. ![]()
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