VPN (virtual Private Network)
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This document discusses virtual private networks (VPNs). It defines VPNs as private networks that use public telecommunications like the internet instead of leased lines. VPNs allow remote access to company networks and save costs by reducing equipment and maintenance expenses. The document outlines common VPN protocols like PPTP, L2TP, and IPsec. It also discusses VPN implementations, device types, advantages, applications, industries that use VPNs, and the future of VPN technology.
![Tunneling
A virtual point-to-point connection made through a public
network. It transports encapsulated datagrams.
Original Datagram
Encrypted Inner Datagram
Datagram Header Outer Datagram Data Area
Data Encapsulation [From Comer]
Two types of end points:
Remote Access
Site-to-Site](https://image.slidesharecdn.com/vpn-121028103742-phpapp01/85/VPN-virtual-Private-Network-9-320.jpg)
VPN (virtual Private Network)
- 1. Presented by- Nitin Talmale B.E. 7th IT
- 3. 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. Became popular as more employees worked in remote Locations Terminologies to understand how VPNs work.
- 4. Private Networks & Virtual Private Networks Employees can access the network (Intranet) from remote locations. Secured networks. The Internet is used as the backbone for VPNs Saves cost tremendously from reduction of equipment and maintenance costs. Scalability
- 5. Remote Access Virtual Private Network
- 6. Brief Overview of How it Works Two connections – one is made to the Internet and the second is made to the VPN. Datagrams – contains data, destination and source information. Firewalls – VPNs allow authorized users to pass through the firewalls. Protocols – protocols create the VPN tunnels.
- 7. Four Critical Functions Authentication – validates that the data was sent from the sender. Access control – limiting unauthorized users from accessing the network. Confidentiality – preventing the data to be read or copied as the data is being transported. Data Integrity – ensuring that the data has not been altered
- 8. Encryption Encryption -- is a method of “scrambling” data before transmitting it onto the Internet. Public Key Encryption Technique Digital signature – for authentication
- 9. Tunneling A virtual point-to-point connection made through a public network. It transports encapsulated datagrams. Original Datagram Encrypted Inner Datagram Datagram Header Outer Datagram Data Area Data Encapsulation [From Comer] Two types of end points: Remote Access Site-to-Site
- 10. Four Protocols used in VPN PPTP -- Point-to-Point Tunneling Protocol L2TP -- Layer 2 Tunneling Protocol IPsec -- Internet Protocol Security SOCKS – is not used as much as the ones above
- 11. VPN Encapsulation of Packets
- 12. Types of Implementations What does “implementation” mean in VPNs? Three types: Intranet – Within an organization Extranet – Outside an organization Remote Access – Employee to Business
- 13. Virtual Private Networks (VPN) Basic Architecture
- 14. Device Types What it means Three types- Hardware Firewall Software
- 15. Device Types: Hardware Usually a VPN type of router Pros Cons • Highest network throughput • Cost • Plug and Play • Lack of flexibility • Dual-purpose
- 16. Device Types: Firewall More security? Pros Cons • “Harden” Operating System • Still relatively costly • Tri-purpose • Cost-effective
- 17. Device Types: Software Ideal for 2 end points not in same org. Great when different firewalls implemented Pros Cons • Flexible • Lack of efficiency • Low relative cost • More labor training required • Lower productivity; higher labor costs
- 19. 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 Cisco VPN Savings Calculator
- 20. Advantages: Scalability Flexibility of growth Efficiency with broadband technology
- 21. Disadvantages VPNs require an in-depth understanding of public network security issues and proper deployment of precautions Availability and performance depends on factors largely outside of their control Immature standards VPNs need to accommodate protocols other than IP and existing internal network technology
- 22. Applications: Site-to-Site VPNs Large-scale encryption between multiple fixed sites such as remote offices and central offices Network traffic is sent over the branch office Internet connection This saves the company hardware and management expenses
- 24. 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 corporate remote 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
- 25. Industries That May Use a VPN Healthcare: enables the transferring of confidential patient information within the medical facilities & health care provider Manufacturing: allow suppliers to view inventory & allow clients to purchase online safely Retail: able to securely transfer sales data or customer info between stores & the headquarters Banking/Financial: enables account information to be transferred safely within departments & branches General Business: communication between remote employees can be securely exchanged
- 26. Statistics From Gartner-Consulting* Remote access for employees working out 90% of homes Remote access for employees while 79% traveling Percentages Site-to-site connectivity between offices 63% Access to network for business 50% partners/customers 0% 20% 40% 60% 80% 100% % of Respondents *Source: www.cisco.com
- 27. Some Businesses using a VPN CVS Pharmaceutical Corporation upgraded their frame relay network to an IP VPN ITW Foilmark secured remote location orders, running reports, & internet/intranet communications w/ a 168-bit encryption by switching to OpenReach VPN Bacardi & Co. Implemented a 21-country, 44-location VPN
- 28. Where Do We See VPNs Going in the Future? VPNs are continually being enhanced. Example: Equant NV As the VPN market becomes larger, more applications 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.