1. VPN:
Virtual Private Network
Presented By:
Gregg Dowdy
Liz Farricker
Whitney Mayoras

2. Outline
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Introductions
What is it?
Overview
Security/Tunneling
Advantages and Disadvantages
Demonstration

3. Introductions

Gregg
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Liz
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BSG – Student Developer
Unified Western Grocers – Retail Technology
Specialist
BSG – Business Analyst
ResNet – Network Technician
COB CRC: Tier 2/3 Support Technician
Whitney

BSG – Student Tester/Analyst

4. VPN: What is it?
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Virtual Private Network
Remote network communication through
Internet
Used by companies/organizations who want
to communicate confidentially
Two parts:


Protected or “inside” network
“Outside” network or segment (less trustworthy)

5. VPN: Types
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Secure VPNs use cryptographic
tunneling protocols.

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IPsec, SSL/TLS, OpenVPN, PPTP, L2TP,
L2TPv3, VPN-Q and MPVPN
Trusted VPNs rely on the security of a
single provider’s network to protect the
traffic.

MPLS and L2F

6. VPN: Security
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Encryption
IPSec
Authentication

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User/System and Data
AAA Servers
(Authentication, Authorization, and Accounting)

Firewalls

7. VPN: Tunneling
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Requires 3 protocols

Carrier
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
Passenger
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Default network protocol
Original data
Encapsulation

GRE, IPSec, L2F, PPTP, L2TP

8. VPN: Encapsulation
Figure 1

9. VPN: Tunneling (cont.)
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Two Basic types of tunneling

Site-to-Site
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
Typically uses GRE
Remote-Access

Typically uses PPP

10. VPN: Advantages
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Cost Effective
Greater scalability
Easy to add/remove users
Mobility
Security

11. VPN: Disadvantages
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Understanding of security issues
Unpredictable Internet traffic
Difficult to accommodate products
from different vendors

12. VPN Demonstration
Click on Start –
select Network
Connections

13. VPN Demonstration
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

14. VPN Demonstration
Select
“Connect to the
Network at my
Workplace”

15. VPN Demonstration
Select “Virtual
Private
Network
Connection”

16. VPN Demonstration
Make a name for
this connection that
you are establishing
– to distinguish this
connection from
other VPN
connections that
might already be
established

17. VPN Demonstration
For this demonstration I
am trying to connect to
my wireless router off
campus therefore the IP
address that I insert is
the IP address for my
router which I can find
out by running an
ipconfig and it is the IP
address for your default
gateway
NOTE: Not all routers
will allow users to VPN
into it

18. VPN Demonstration
Personal
preference as to
whether or not you
want other users to
be able to use this
VPN connection on
this computer

19. VPN Demonstration

20. VPN Demonstration

21. 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 IP address of your
router in a web browser

22. VPN Demonstration

23. VPN Demonstration
In Start – Run insert the IP
address of the computer that
you want to access that is
connected to the router

24. VPN Demonstration
Using the same
username and password
already established for
the router you can
connect to this specific
computer

25. VPN Demonstration
These are only the files that are “shared” on this computer

26. How to Connect to OSU:
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How to connect to OSU:
Dave Sullivan made a helpful Tutorial
First on the Engineering Website you have to download
the Cisco VPN Client
One must acquire authorization information prior to
using the VPN service
Once registration is complete you download the
appropriate client depending on your operating system;
and follow the steps to complete the connection

27. References

[Figure 1]
<www.csun.edu/~vcact00f/311/termProjects/700class/VPN.ppt>

Mitchell, Bradley. "VPN Tutorial." About.Com. 2007. 8 Mar.
2007
<http://compnetworking.about.com/od/vpn/l/aa010701a.htm>.

Tyson, Jeff. "How Virtual Private Networks Work." How Stuff
Works. 6 Mar. 2007
<http://computer.howstuffworks.com/vpn.htm>.

"Virtual Private Network." Wikipedia: the Free Encyclopedia. 6
Mar. 2007. 9 Mar. 2007 <http://en.wikipedia.org/wiki/Vpn>.