This document discusses virtual private networks (VPNs). It defines a VPN as a network that uses public network paths while maintaining security and protection like private networks. It describes two main types of VPNs: remote access VPNs that enable remote connectivity, and site-to-site VPNs that connect LANs either within a company (intranet) or between companies (extranet). The document also discusses routing protocols and redistribution needed for VPN implementation in a wide area network (WAN), and provides example commands for configuring a VPN tunnel between source and destination routers.

1. Virtual Private Network
(VPN)
SUBMITTED BY:
NAME : MRIDUL GUPTA
ROLL NO: 11901032
TECHNOLOGY: NETWORKING
COLLEGE : PUNJABI UNIVERSITY PATIALA
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2. Topics covered in project
1.INTRODUCTION
2.VPN
3.TYPES OF VPN
4.ROUTING PROTOCOL AND REDISTRIBUTION
5Creating WAN(wide area network)
6.VPN IMPLEMENTATION IN WAN
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3. INTRODUCTION
Virtual: Virtual means not real or in a different state of being. In a VPN, private communication
between two or more devices is achieved through a public network the Internet. Therefore, the
communication is virtually but not physically there.
Private: Private means to keep something a secret from the general public. Although those two
devices are communicating with each other in a public environment, there is no third party who
can interrupt this communication or receive any data that is exchanged between them.
Network: A network consists of two or more devices that can freely and electronically
communicate with each other via cables and wire. A VPN is a network. It can transmit
information over long distances effectively and efficiently.

4. What is VPN ?
Virtual Private Network, is defines a network that uses public network paths but
maintains
the security and protection of private networks. For example, Delta Company has
two
locations, one in Noida, New Delhi (A) and Pune, Mumbai (B). In order for both
locations
to communicate efficiently, Delta Company has the choice to set up private lines
between
the two locations. Although private lines would restrict public access and extend
the use of
their bandwidth, it will cost Delta Company a great deal of money since they
would have to
purchase the communication lines per mile. The more viable option is to
implement a VPN.
Delta Company can hook their communication lines with a local ISP in both cities
would act as a middleman, connecting the two locations. This would create an affordable
small area network for Delta Company.

5. Types of VPN
1.REMOTE ACESS VPN: Enable remote connectivity using any Internet access technology.
The remote user launches the VPN client to create a VPN tunnel to the gateway.
2.Site to Site VPN:
I).INTRANET VPN: If a company has one or more remote locations that they wish to join in
a single private network, they can create an intranet VPN to connect LAN to LAN.
ii).EXTRANET VPN: When a company has a close relationship with another
company (for example, a partner, supplier or customer), they can build an
extranet VPN that connects LAN to LAN, and that allows all of the various
companies to work in a shared environment.

6. ROUTING
PROTOCOL
Routing Protocols are the set of defined rules used by
the routers to communicate between source &
destination.
Router protocols include:
• Routing Information Protocol (RIP)
• Interior Gateway Routing Protocol (IGRP)
• Open Shortest Path First (OSPF)
FOR WAN :
WE NEED REDISTRIBUTION BETWEEN
NETWORKS SO THAT DIFFERENT ROUTING
PROTOCOLS COMMUNICATE WITH EACH OTHER.

7. Wide area
network (WAN)
• A WAN could be a connection of LAN connecting to other LANs &MAN's.
• A LAN can span to a building or campus. And a MAN span over a city but
• A WAN can span sites in multiple cities, countries and continents.
• WANs are not restricted to the same geographical location as a LAN would be. A
LAN can be set up in any number of geographical areas and be connected to a WAN—
meaning a WAN is not constrained to one specific location.
• A virtual private network facilitates connectivity and security between WAN sites.
Different VPNs can be utilized for different use cases.

8. VPN -Implementation
AS we discussed that VPN creates a
secret tunnel between source
and destination so ,to create
that tunnel we
need these commands .
FOR SOURCE ROUTER:
Int tunnel 1
Ip add 100.0.0.1 255.0.0.0
Tunnel source se0/0/0
Tunnel destination 14.0.0.2
FOR DESTINATION ROUTER:
Int tunnel 1
Ip add 100.0.0.2 255.0.0.0
Tunnel source se0/1/0
Tunnel destination 10.0.0.1

10. THANK YOU
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