About IP Security Architecture

IP Security Architecture (IPsec) provides cryptographic protection for IP packets in IPv4 and IPv6 networks.

This chapter covers the following topics:

• Introduction to IPsec

• IPsec Packet Flow

• IPsec Security Associations

• IPsec Protection Protocols

• IPsec Protection Policies

• Transport and Tunnel Modes in IPsec

• Virtual Private Networks and IPsec

• Virtual Private Networks and IPsec

• IPsec and FIPS 140

• IPsec and SCTP

• IPsec Configuration Commands and Files

To implement IPsec on your network, see Chapter 7, Configuring IPsec. For reference information, see Chapter 12, IPsec and Key Management Reference.