VPN

VPN: encapsulating the communication between the two PC’s in an encrypted tunnel that uses strong encryption methods.

IPsec (Internet Protocol Security), is a set of protocols define by the Internet Enginering Task Force (IETF) to provide IP security at the network layer.

IPsec

IPSec based VPN made up of two parts:

• 1. IKE Internet Key Exchange protocol
• 2. ESP Encapsulating Security Payload - IPsec protocols

Vorlage:1 two endpoints agree on whitch methods will be used to provide security for the IP traffic ist used to manage connections, by defining a set of SA (Security Associations) one SA for each connection. SAs are unidirectional