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Goal of The Paper. What exactly is a VPN? Why do you need a VPN? what are some of the technologies used in deploying a VPN? How does a VPN work? How many different types of VPNs? What are the advantages and disadvantages? What is the VPN future scope. Introduction.

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goal of the paper
Goal of The Paper
  • What exactly is a VPN?
  • Why do you need a VPN?
  • what are some of the technologies used in deploying a VPN?
  • How does a VPN work?
  • How many different types of VPNs?
  • What are the advantages and disadvantages?
  • What is the VPN future scope.
introduction
Introduction
  • The Internet has changed the way what we do business
  • VPNs achieve one or more of the following goals:
  • connect users securely their own corporate network (remote access)
  • link branch offices to an enterprise network (intranet)
  • extend organizations' existing computing infrastructure to include partners, suppliers and customers (extranet).
what is a vpn
What is a VPN

A Virtual Private Network (VPN) is a group of two or more computer systems, typically connected to a private network (a network built and maintained by an organization solely for its own use) with limited public-network access, that communicates “securely” over a public network.

vpn concepts
VPN Concepts
  • IPSEC: IP Security
  • L2F: Layer 2 Forward tunneling protocol
  • L2TP: Layer 2 Tunneling Protocol
  • PPP: Point-to-Point Protocol
  • PPTP: Point-to-Point Tunneling Protocol
  • QoS: Quality of Service
how vpns work
How VPNs Work
  • VPNs are placed between private and public domains in networks to enforce dedicated secure paths, or tunnels.
security
Security
  • Firewalls
  • Encryption
  • IPSec
  • AAA Server

Authentication

Authorization

Accounting

types of vpns
Types of VPNs
  • Software-based VPNs
  • Hardware-based VPNs
  • Standalone VPN Application packages
advantages of vpn
Advantages of VPN
  • Cost Savings

- replace expensive dedicated leased lines

- replace modem pools and eliminate long

distance dial-up fees.

- increase business efficiency

advantage of vpns
Advantage of VPNs
  • Easy Configuration

- allocating IP addresses

- creating user accounts on the gateway or

authentication server

disadvantage of vpns
Disadvantage of VPNs
  • VPNs require an in-depth understanding of public network security issues
  • The QoS depends on factors largely outside of control
  • VPN technologies from different vendors may not work well
  • VPNs need to accommodate protocols
  • Latency
the future of vpn
The future of VPN
  • Depend mainly on industry dynamics
  • VPNS should increase if standards solidify and vendor

products interoperate fully with other

  • The use of VPN will increase if companies can measure

the significant value