In IPsec LAN-to-LAN connections, the security appliance 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 may 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 security appliance supports only Cisco peers. In IPsec terminology, a peer is a remote-access client or another secure gateway. The security appliance 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 security appliance 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 security appliance uses the ISAKMP and IPsec tunneling standards to build and manage tunnels. Each secure connection is called a tunnel. Tunneling 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.

Supporting the Nokia VPN Client Tunneling Overview.This chapter describes how to configure the IPsec and ISAKMP standards to build Virtual Private Networks. Configuring an External Server for Security Appliance User Authorization.Managing Software, Licenses, and Configurations.Configuring Tunnel Groups, Group Policies, and Users.Configuring ARP Inspection and Bridging Parameters.Applying Application Layer Protocol Inspection.Configuring AAA Servers and the Local Database.Configuring DHCP, DDNS, and WCCP Services.Configuring Ethernet Settings and Subinterfaces.Configuring Interfaces for the Cisco ASA 5505 Adaptive Security Appliance.Getting Started and General Information.

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