The Internet Engineering Task Force (IETF) has published a number of Requests for Comment (RFCs) that describe the security architecture for the IP layer. All RFCs are copyrighted by the Internet Society. For a link to the RFCs, see http://ietf.org/. The following list of RFCs covers the more general IP security references:
RFC 2411, “IP Security Document Roadmap,” November 1998
RFC 2401, “Security Architecture for the Internet Protocol,” November 1998
RFC 2402, “IP Authentication Header,” November 1998
RFC 2406, “IP Encapsulating Security Payload (ESP),” November 1998
RFC 2408, “Internet Security Association and Key Management Protocol (ISAKMP),” November 1998
RFC 2407, “The Internet IP Security Domain of Interpretation for ISAKMP,” November 1998
RFC 2409, “The Internet Key Exchange (IKE),” November 1998
RFC 3554, “On the Use of Stream Control Transmission Protocol (SCTP) with IPsec,” July 2003 [ not implemented in the Solaris 10 release ]