Virtual Private Network - the Netgroup at Politecnico di Torino
Virtual Private Network - the Netgroup at Politecnico di Torino
Virtual Private Network - the Netgroup at Politecnico di Torino
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Tunneling<br />
A packet (or frame) is carried through an IP<br />
network within an IP packet<br />
IP network<br />
(e.g., Internet)<br />
Tunnel end-point X<br />
Tunnel<br />
Tunnel end-point Y<br />
IP Header<br />
from X to Y<br />
Header<br />
Payload<br />
• An IP packet within an IP packet (IP-in-IP)<br />
• GRE, IPsec<br />
• A layer 2 frame, within an IP packet<br />
• PPTP, L2TP<br />
VPN - 34 © M. Bal<strong>di</strong> & L. Ciminiera: see page 2