The document provides an introduction to Virtual Private Networks (VPNs), explaining their definition, functionality, and types. It highlights the advantages of VPNs over traditional private networks, emphasizing their cost-effectiveness and security through tunneling protocols like PPTP and L2TP. Additionally, the document discusses the roles of firewalls in VPN setups and outlines the benefits and challenges associated with Mobile VPNs (MVPN).

1. Presented by
Or Sereiparinha
Phan Chhunlong

2. VPN

3. Introduction
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.

4. VPN & Non-VPN
Virtual Private Network
Non - Private Network
∞ Advantages of private and
global internet
∞ Privatization is done by leased
line
∞ Cost inefficient
∞ Completely isolated network
from world
∞ Unsecured connection
∞ Costlier

5. How VPN Works ?

6. Tunneling
What is Tunnel?
∞
∞
∞
VPN technology
Maintaining a logical network connection
The process of placing an entire packet

7. VPN Tunneling Protocol
∞ Point-to-Point Tunneling Protocol (PPTP)
∞
∞
Widely support among Window users
PPTP is faster
∞ Layer Two Tunneling Protocol (L2TP)
∞
∞
Data integrity
Developed by Microsoft and Cisco
∞ Internet Protocol Security (IPSec)
∞
∞
Multiple related protocols
Complete VPN protocol solution

8. L2TP – PPTP - IPSec

9. Types of VPNs
∞ Remote access VPN
∞
∞
To establish secure connection
Client software
∞ Intranet VPN
∞
∞
Link corporate headquarters remote offices
Reduces WAN bandwidth & Connect new sites easily
∞ Extranet VPN
∞ Link customer, suppliers, partner of interest to corporate intranet
Over a shared using dedicated connection

10. How it work ?

11. Firewall
∞ Firewall ?
∞
∞
Provides network security
Prevents attacks and secures your data
∞ Two approaches to using firewall with VPN server
∞
∞
VPN server in front of the firewall
VPN server behind the firewall

12. Server in front
& behind firewall

13. Server in front
& behind firewall

14. mVPN
∞
What is mVPN?
∞ Mobile device with access to network resources and software
application on their home network

15. Advantages & Disadvantages
Advantages
Disadvantages
∞
∞
∞
∞
∞ Security issues
∞ Solution relies on an ISP
∞ Product & Solution from different
vendor, compatible due to issues with
VPN technology standard
Security
Reliability
Cost Saving
Scalability

16. 5mn Before Demo ?