From here, you can customize IPsec’s default behavior in several areas, as we discuss
in the following sections.
Key Exchange (Main Mode)
IPsec key exchange is used to establish authentication and data encryption between
two computers. This process is divided into two phases: Main Mode and Quick Mode. In
Main Mode, the two computers that are communicating use the IKE protocol to set
up a secure, authenticated channel between them. This process creates a Main Mode
security association (SA). You’ll sometimes also hear this referred to as a Phase I SA.
The settings that you define here will apply ...
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