December 2005
Intermediate to advanced
1032 pages
29h 12m
English
Content preview from The Complete Cisco VPN Configuration Guide
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Chapter 3. IPsec
IP Security, or IPsec for short, is a framework of standards that provides the following key security features at the network layer between two peer devices:
Data confidentiality
Data integrity
Data authentication
Anti-replay detection
Peer authentication
The Internet Engineering Task Force (IETF) defines the standards for IPsec in various RFCs. Because it provides network layer protection between devices or networks, and because it is an open standard, it is commonly used in today’s networks that use IPv4 and IPv6.
This chapter will explore many of the standards that IPsec uses to provide a secure transport for communication. I’ll first cover the standards used, and then discuss how these standards are implemented by IPsec in the ...
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