IPsec Virtual Private Network Fundamentals

Chapter 1. Introduction to VPN Technologies Modern business environments have been consistently changing since the advent of the Internet in the 1990s. Now more than ever, organizational leaders are asking themselves how efficiencies can be ...

VPN Overview of Common Terms A VPN is a means to securely and privately transmit data over an unsecured and shared network infrastructure. VPNs secure the data that is transmitted across this common infrastructure by encapsulating the data, encryp...

Characteristics of an Effective VPN VPNs exist to effectively, securely, and privately protect data that is transmitted between two networks from the common, shared, and separately maintained infrastructure between the two networks. In order to ef...

VPN Technologies Although IPsec-based VPNs represent one of the most secure and widely deployed types of VPNs, they are only one of many VPN technologies in existence today. As we'll discuss throughout the course of this book, VPNs have been des...

Common VPN Deployments Network infrastructures in which a VPN technology may be commonly deployed include, but are not limited to, trunks to Internet service provider networks, corporate extranet partner networks, or even private leased line conne...

Business Drivers for VPNs As the amount of data that traverses untrusted, shared infrastructures continues to increase, so does the need for secure transmission of that data. Now that you've seen some introductory concepts related to site-to-sit...

IPsec VPNs and the Cisco Security Framework Cisco's end-to-end security strategy is summarized comprehensively by the Cisco Security Wheel (illustrated in Figure 1-20). A corporate security policy should exist at the center of every end-to-end cor...

Summary A virtual private network delivers upon business needs for data confidentiality, data integrity, data authenticity, and non-repudiation. In doing so, A VPN hardens network infrastructure against untrusted, malicious activity. As the compet...