Secure IP Interfaces

Secure IP interfaces are virtual IP interfaces that you can configure to provide confidentiality and authentication services for the data flowing through such interfaces. The software provides these services using mechanisms created by the suite of IPSec standards established by the IETF.

Secure IP interfaces connect the router to any other endpoint through the routed network and allow much of the same functionality as other IP interfaces. Traffic can reach a secure IP interface via routing or policy routing.

• A secure tunnel is a layer 2 entity. It is a point-to-point connection that is mapped on top of other IP interfaces. Secure tunnels carry only IP traffic.
• A secure IP interface is a layer 3 entity; that is, an IP interface mapped on top of a secure tunnel that inherits all security associated with it.

Secure IP interfaces are a logical representation of a secure connection between two security endpoints, one of which is the local system. The remote endpoint can be another security gateway or a host.

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