Transcript VPN

VPN’s
Andrew Stormer
COSC 356
Fall 2004
What is a VPN?
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Acronym – Virtual Private Network
Connects two or more private
networks over a public network
Uses an encrypted tunnel
Offer same security and encryption
features of private networks.
History of VPN’s
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Began in 1995
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Automotive Industry Action Group
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Fulfill need for secure and efficient
communication between parties
Tunneling
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One network sends via 2nd network
connection
Encapsulate protocol within packets
PPTP
IPSec
L2TP
PPTP
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Point-to-Point Tunneling Protocol
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Combination of PPP & TCP/IP
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Encapsulates information within IP
packets
IPSec
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Internet Protocol Security
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Developed by IETF
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Secures OSI Layer 3
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IPv4 & IPv6 compatible
L2TP
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Layer Two Tunneling Protocol
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Expansion of PPP
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Endpoints reside on different devices
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Devices connected via packet switching
Encryption
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Data is encrypted at source
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Decrypted at destination
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3DES
3DES
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Triple Data Encryption Standard
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Expanded from DES in 1998
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Uses DES algorithm 3 times
Categories
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Hardware based
– encrypting routers
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Firewall based
– most secure
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Standalone application packages
– sometimes used to enhance hardware
solutions
Features
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Support basic LAN interface
Authorization & encryption
Data compression
Routing ability
Network address translation
VPN
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vs.
Allow full access to
company network
neighborhood
Normal log-in
information
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Extranet
Extremely regulated
access to portion of
intranet.
Issuance of digital
certificates
Benefits
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Reduce long-distance phone costs
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No long-term contracts
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Offers flexibility to small and medium
sized businesses
Security
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Same security and encryption features
as a private network.
Most secure connection when using a
wireless device
Setup a VPN Connection