An understanding of how these components relate to each other gives a clear understanding, implementation and the ability to use IPSec. The IPSec Roadmap defines how these components interact with each other.The standard associated with security architecture is RFC 4301, the standard associated with IP Encapsulating Security Payload (ESP) is RFC 4303 and the standard associated with IP Authenticatication Header is 4302 just to mention but a few. ESP and AH documents define the protocol as well as the services they provide and also define packet processing rules. Their only undoing is their inability to specify the transforms used in the provision of these capabilities. Another component of great concern is the Internet Key Exchange (IKE) which is responsible for the generation of keys for the IPSec protocols. Furthermore, it also negotiates keys for other protocols that may require keys.In the IPSec network layer security, the above stated three components, that is the AH, ESP and IKE, are highly interconnected towards the achievement of IPSec. In this case, AH and ESP rely on an existing security association which is established by the IKE. This is, therefore, an implication that should IKE break then definitely there will be no protection provided by the AH and ESP. IPsec VPN Tunneling.
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