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