IPSec-VPN Simulation Based on GNS3

For the problem that the practical teaching of network engineering specialty in universities lacks actual network engineering cases, we choose IPSec-VPN as the study object, and based on GNS3 network simulator, we have constructed IPSec-VPN network topology and established a dynamic executable IPSec-VPN network case through the combined application of AH, ESP and IKE Agreement that can simulate a real IPSec-VPN secure network. The operation has simulated the network behaviors with normal communications between sites and analyzed the security of encrypted data packets on the public network, and the test results have verified the correctness and the actual availability of the method.