Remember this IPsec is a secure encryption protocol used with VPNs. Encapsulating Security Payload (ESP) provides confidentiality, integrity, and authentication for VPN traffic. IPsec uses Tunnel mode for VPN traffic and can be identified with protocol ID 50 for ESP. It uses IKE over port 500. A full tunnel encrypts all traffic after a user has connected to a VPN. A split tunnel only encrypts traffic destined for the VPN’s private network.
