presentation on vpn

8/7/2019 Presentation on VPN

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© ARNAB CHATTERJEE



VPN

VIRTUAL PRIVATE NETWORK

Presented by:

Arnab Chatterjee. (19008)Krishna Kumar Yadav. (19018)

Copyrights reserved© 2011: Arnab Chatterjee.



ARNAB CHATTERJEEPresents:

� What is VPN?

� VPN components.

� Types of VPN.




WHAT IS VPN?

�

Virtual Private Network is a type of private network that uses public

telecommunication, such as the Internet,

instead of leased lines to communicate.




TRADITIONAL CONNECTIVITY

Public networks are used to move information between

trusted network segments using shared facilities like frame

relay or atm




VPN COMPONENTS

�Protocols�Security

�Appliances




� Protocols

� IP Security (IPSec)

±Transport mode

±Tunnel mode

�

Point-to-Point Tunneling Protocol (PPTP)±Voluntary tunneling method

±Uses PPP (Point-to-Point Protocol)

VPN COMPONENTS




� Protocols

� Layer 2 Tunneling Protocol (L2TP)

±Exists at the data link layer of OSI

±Composed from PPTP and L2F (Layer 2

Forwarding)±Compulsory tunneling method

VPN COMPONENTS




� Security:

� Encryption

±Technique for scrambling and

unscrambling information

±Unscramble called clear-text

±Scrambled information cipher-text

VPN COMPONENTS




VPN COMPONENTS� Security:� Keys

±

Secret code that the encryption algorithm uses tocreate a unique version of cipher-text

± 8-bits keys = 256 combinations or two to the eighthpower

± 16-bits keys = 65,536 combinations or two to the 16th

power

± 56-bits keys = 72,057,594,037,927,900 or two to the56th power

± 168-bits keys.




� Authentication

±Determine if the sender is the authorizedperson and if the data has been redirect or

corrupted

±

User/System Authentication±Data Authentication

VPN COMPONENTS




� Appliances.� Intrusion detection firewalls

±Monitors traffic crossing network parametersand protects enterprises from unauthorizedaccess

± Packet-level firewall checks source and

destination± Application-level firewall acts as a host

computer between the organizations networkand the Internet.

VPN COMPONENTS




TYPES OF VPN




KRISHNA KUMAR YADAV

Presents:

� How VPN works?

� Benefits of VPN.



How VPN Work«?

Two connections ± One is made to the Internet andthe second is made to the VPN.

Data grams ± It contains data, destination and sourceinformation.

Firewalls ± VPNs allow authorized users to pass

through the firewalls.

Protocols ± Protocols create the VPN tunnels.



Four Critical Functions

Authentication ± It validates that the data was sentfrom the sender.

Access control ± It limiting unauthorized users from

accessing the network.Confidentiality ± It preventing the data to be read or

copied as the data is being transported.

Data Integrity ± It ensuring that the data has not

been altered.



EncryptionEncryption

Encryption - is a method of ³scrambling´ data before

transmitting it onto the Internet.

Public Key Encryption Technique

Digital signature ± for authentication



Tunneling

A virtual point-to-point connection

made through a public network. It transports

encapsulated data grams.

Encrypted Inner Datagram

Datagram Header Outer Datagram Data Area

Original Datagram

Data Encapsulation [From Comer]



VPN Productivity and Cost Benefits

Extends geographic connectivity..

Boosts employee productivity.

Improves Internet security.

Scales easily.

Costs associated with implementing VPN

± In House implementation

± Outsourced implementation

± Middle Ground implementation



Advantages

VS.

Disadvantages



Advantages: Cost Savings

� Eliminating the need for expensive long-distance

leased lines

� Reducing the long-distance telephone charges for

remote access.

� Transferring the support burden to the service

providers

�

Operational costs



Disadvantages

VPNs require an in-depth understanding of publicnetwork security issues and proper deployment of precautions

Availability and performance depends on factorslargely outside of their control

Immature standards

VPNs need to accommodate protocols other than IPand existing internal network technology



Applications: Site-to-Site VPNs

Large-scale encryption between multiple fixedsites such as remote offices and central offices

Network traffic is sent over the branch officeInternet connection

This saves the company hardware andmanagement expenses



Site-to-Site VPNs



Applications: Remote Access

Encrypted connections between mobile or remote

users and their corporate networks

Remote user can make a local call to an ISP, as

opposed to a long distance call to the corporateremote access server.

Ideal for a telecommuter or mobile sales people.

VPN allows mobile workers & telecommuters to take

advantage of broadband connectivity.i.e. DSL, Cable



Industries That May Use a VPN

Healthcare: enables the transferring of confidential patient informationwithin the medical facilities & health care provider

Manufacturing: allow suppliers to view inventory & allow clients topurchase online safely

Retail: able to securely transfer sales data or customer info between stores& the headquarters

Banking/Financial: enables account information to be transferred safelywithin departments & branches

General Business: communication between remote employees can besecurely exchanged



Statistics From Gartner-Consulting*

50%

63%

79%

90%

0% 20% 40% 60% 80% 100%

Access etwork for

bus ess

artners/customers

S te-to-s te connectivity

between offices

R emote access for

employee s while

traveling

R emote access for

employee s working out

of homes

% of R espondents

ercentages

*Source: www.cisco.com



Some Businesses using a VPN

CVS Pharmaceutical Corporation upgraded theirframe relay network to an IP VPN

ITW Foilmark secured remote location orders,running reports, & internet/intranet communicationsw/ a 168-bit encryption by switching to OpenReachVPN

Bacardi & Co. Implemented a 21-country, 44-location VPN



Where Do We See VPNs Going in the

Future?

VPNs are continually being enhanced.

Example: Equant NV

As the VPN market becomes larger, moreapplications will be created along with more

VPN providers and new VPN types.

Networks are expected to converge to create

an integrated VPN

Improved protocols are expected, which will

also improve VPNs.



� DEMONSTRATION TO SET UP VPN

ARNAB CHATTERJEE



In Network

Connections on the

left hand side there

is a link to Create

New Connection click on this and a

wizard will pop up

assisting the user

VPN Demonstration




Select Connect

to the Network

at my

Workplace

VPN Demonstration




Select Virtual

Private

Network

Connection

VPN Demonstration




Make a name for this

connection that you

are establishing to

distinguish this

connection fromother VPN

connections that

might already be

established

VPN Demonstration




Personal preference

as to whether or not

you want other

users to be able to

use this VPNconnection on this

computer

VPN Demonstration




VPN Demonstration




This is a profile (username

and password) that has

already been created on

your router which can be

created by typing in the IPaddress of your router in a

web browser

VPN Demonstration




VPN Demonstration




In Start Run insert the IPaddress of the computer that

you want to access that is

connected to the router

VPN Demonstration




Using the same username

and password already

established for the router

you can connect to thisspecific computer

VPN Demonstration


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