IPsec Virtual Private Network Fundamentals

Chapter 4. Common IPsec VPN Issues In this chapter, we will discuss several areas of IPsec virtual private network (VPN) design that commonly present obstacles to successful deployment. We will begin our discussion with a brief overview of t...

IPsec Diagnostic Tools within Cisco IOS The most commonly used categories of diagnostic tools used within Cisco IOS are show and debug commands. Throughout the course of this chapter, we will use variations of these two command sets to diagnose is...

Common Configuration Issues with IPsec VPNs There are many parameters and features to understand when deploying IPsec VPNs. In this section, we will discuss configuration issues presented when one or more IPsec VPN gateways are configured incorrec...

Architectural and Design Issues with IPsec VPNs Aside from issues related to configuring ISAKMP and IPsec policy, there is a variety of network elements that can interfere with optimal operation of an IPsec VPN if it is not managed correctly. In t...

Summary In this chapter, we've covered several different broader areas of common issues with IPsec VPN deployments. The first area of common IPsec VPN issues we discussed pertains to configuration of ISAKMP and IPsec themselves, including IKE SA ...