Chapter 10. IPsec VPN Design Considerations

This chapter covers the following topics:

• VPN Basics

• Types of IPsec VPNs

• IPsec Modes of Operation and Security Options

• Topology Considerations

• Design Considerations

• Site-to-Site Deployment Examples

• IPsec Outsourcing

Oh, how much is today hidden by science! Oh, how much it is expected to hide! —Friedrich Nietzsche, The Genealogy of Morals, 1887

Private information is practically the source of every large modern fortune. —Oscar Wilde, An Ideal Husband, 1895

Virtual private networks (VPNs) are a means to establish a private network over any other network. Typically, the “other” network is deemed insecure, so traffic sent over it requires some kind of extra protection. The most common example ...

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