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Unformatted text preview: s allowed. 8 VPN, IPSec and TLS Virtual Private Networks (VPN)
• Network of virtual circuits for carrying private traffic.
• VPN Protocols
PPP L2TP IPsec Client-server Client-server Host-to-Host Purpose Remote access
via tunneling Remote access
via tunneling OSI layer Layer 2 Layer 2 Intranets, extranets,
remote access via
Layer 3 Data Data Network IP, IPX,
AppleTalk, etc IP, IPX, IP AppleTalk, etc Mode TCP/IP Layer
Protocol • PPP and L2TP are aimed at remote access use.
• IPsec is used for connecting LANs.
VPN IPsec IKE v2 TLS M. Mogollon – 01/08 - 9 • There are several types of IP tunneling mechanisms and, depending on their form, they can
provide some level of intrinsic data security. IP tunneling mechanisms include IP/IP, Generic
Routing Encapsulation (GRE) tunnels, Layer 2 Tunneling Protocol (L2TP), IPsec, and
Multiprotocol Label Switching (MPLS). Some of these protocols are not often thought of as
tunneling protocols, but they are and they do provide some type of protection.
• IPsec is considered the best tunneling protocol for IP networks because it provides strong
security services such as encryption, authentication, and key management.
• The L2F, PPP, L2TP protocols are strictly tunneling protocols. Only IPsec can be used for
encryption and key management in IP environments. IPsec is considered the best VPN solution
because it includes strong security measurements, encryption, authentication, and key
management. Because IPsec is designed to handle only IP packets, PPTP and L2TP are more
suitable for use in non-IP multi-protocol environments such as NETBEUI, IPX, and AppleTalk. 9 VPN, IPSec and TLS VPN Benefits
• Ease of use – Facilitating electronic communications makes
corporations more efficient and productive. • Cost
— Eliminating long-haul leased lines, 800 numbers or long distance fees,
modem banks, and multiple access connections results in significant savings.
— Voice over IP reduces long distance phone call expenses.
— Savings of up to 65% on monthly circuit costs by moving...
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This note was uploaded on 05/26/2010 for the course TECH 6350 taught by Professor Mogollon during the Spring '10 term at University of Arkansas for Medical Sciences.
- Spring '10