s & Page 17 DI Christian Ploninger IP Traffic PPP Connection Layer 2 Tunneling Protocol Encrypted Data Transfer Intranet Wireless Accesspoint + Firewall VPN Server Wirless User IPSEC Transport IEEE g IEEE a IEEE b IEEE IP Traffic Sicher gegen Rouge APs Sicher gegen Man-in-the-Middle Attacken (pre-shared secret) Sicher gegen Eavesdropping (IPSEC-ESP) State-of-the-art Algorithmen (3DES, AES) (kein WEP!) [RFC 1171]: The Point-to-Point Protocol [RFC 2661]: Layer Two Tunneling Protocol L2TP
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