Virtual Private Network - the Netgroup at Politecnico di Torino

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An example Traditional solution VPN solution VPN - 4 © M. Baldi & L. Ciminiera: see page 2
Why VPN? VPNs enable cutting costs with respect to expensive connectivity solutions Private Networks are based on • Private leased lines • Long distance dial-up solutions VPN - 5 © M. Baldi & L. Ciminiera: see page 2
Page 1 and 2: VPN Virtual Private Network Mario B
Page 3: A Definition Virtual Private Networ
Page 7 and 8: Why VPN? VPN enable selective and f
Page 9 and 10: Example VPN - 9 © M. Baldi & L. Ci
Page 11 and 12: VPN Deployment Scenarios • Intran
Page 13 and 14: Intranet characteristics • Secure
Page 15 and 16: Extranet VPN • Restricted access
Page 17 and 18: Remote User Access • Shared infra
Page 19 and 20: Example of intranet VPN VPN - 19 ©
Page 21 and 22: Internet Access • Centralized (co
Page 23 and 24: Distributed Internet Access INTERNE
Page 25 and 26: VPN Models • Peer Model • MPLS
Page 27 and 28: Provider provisioned and customer p
Page 29 and 30: Layer 2 VPNs • Virtual Private LA
Page 31 and 32: A Tassonomy of VPN Technologies VPN
Page 33 and 34: VPN Components VPN - 33 © M. Baldi
Page 35 and 36: Tunneling • A and B are enterpris
Page 37 and 38: GRE • Generic Routing Encapsulati
Page 39 and 40: IPv4 Encapsulation and Routing Info
Page 41 and 42: New fields • Key (high 16 bit)
Page 43 and 44: Access VPN: Two Deployment Modes VP
Page 45 and 46: Highlights of Virtual Dial-Up • A
Page 47 and 48: Layer 2 Tunneling Protocol Original
Page 49 and 50: L2TP Header • Control Message •
Page 51 and 52: Other header fields • Ns • Nr
Page 53 and 54: Tunnels and sessions • Multiple s
Page 55 and 56:
Establishing sessions • A session
Page 57 and 58:
Security issues • Tunnel endpoint
Page 59 and 60:
Point-to-Point Tunneling Protocol (
Page 61 and 62:
PPTP Header Length Magic cookie Dat
Page 63 and 64:
Authentication Header Protocol (AH)
Page 65 and 66:
IPsec VPNs IPsec tunnel between VPN
Page 67 and 68:
IPSec modes of operation • Tunnel
Page 69 and 70:
Internet Key Exchange (IKE) protoco
Page 71 and 72:
VPN Gateway Positioning VPN - 71 ©
Page 73 and 74:
IPsec, VPN Gateways and NATs • Au
Page 75 and 76:
Peer VPN and MPLS-based Solutions V
Page 77 and 78:
MPLS-based Layer 2 VPNs: PWE3 • P
Page 79 and 80:
MPLS-based Layer 3 VPNs • Provide
Page 81 and 82:
MPLS VPN Components • CE router c
Page 83 and 84:
Control Plane • Establishment of
Page 85 and 86:
Packet Routing • PE2 looks-up VRF
Page 87 and 88:
Benefits • No constraints on addr
Page 89 and 90:
MPLS/Virtual Router VPNs • PEs ex
Page 91 and 92:
References • E. Rosen and Y. Rekh
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Virtual Private Network - the Netgroup at Politecnico di Torino

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