Vpn
- 2. Contents: ▪ Introduction:VPN ▪ Traditional Connectivity ▪ Remote Access Virtual Private Network ▪ Brief Overview of How it Works ▪ Four Critical Functions ▪ Tunneling ▪ Four Protocols used in VPN
- 3. Contents: ▪ VPNTopology :Type ofVPNs ▪ Remote AccessVPN ▪ Site to siteVPN ▪ VPN Security ▪ VPN : Advantages ▪ VPN : Disadvantages ▪ Applications ▪ Future OfVPN ▪ References
- 4. Introduction: VPN ▪ Linking of two or more computing devices to share resources is networking. ▪ Virtual Private Network is a type of private network that uses public telecommunication, such as the Internet, instead of leased lines to communicate .
- 6. Remote Access Virtual Private Network
- 7. 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.
- 8. 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
- 9. Tunneling ▪ A virtual point-to-point connection made through a public network. It transports encapsulated datagrams. Encrypted Inner Datagram Datagram Header Outer Datagram DataArea Original Datagram Data Encapsulation Two types of end points: Remote Access Site-to-Site
- 10. Tunneling ▪ MostVPNs rely on tunneling to create a private network that reaches across the Internet. Essentially, tunneling is the process of placing an entire packet within another packet and sending it over a network. Tunneling requires three different protocols: ▪ Passenger protocol -The original data (IPX, IP) being carried ▪ Encapsulating protocol -The protocol (GRE, IPSec, L2F, PPTP, L2TP) that is wrapped around the original data ▪ Carrier protocol -The protocol used by the network that the information is traveling over
- 11. 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
- 12. VPN Topology : Type of VPNs ▪ Remote Access VPN ▪ Site-to-Site VPN ▪ Intranet VPN ▪ Extranet VPN
- 13. Remote AccessVPN ▪ Remote-access, called as virtual private dial-up network (VPDN) ▪ LAN connection used by a company that has employees who need to connect to the private network from various remote locations. ▪ Remote-access VPNs permit secure encrypted ▪ connections between a company's private network.
- 15. Site-to-Site VPN ▪ Intranet-based - 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. ▪ Extranet-based - 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.
- 18. VPN Security ▪ A well-designed VPN uses several methods for keeping your connection and data secure: ▪ Firewalls ▪ Encryption ▪ IPSec ▪ You can set firewalls to restrict the number of open ports, what type of packets are passed through and which protocols are allowed through.
- 19. VPN : Advantages ▪ Cost Savings . ▪ Extend geographic connectivity. ▪ Improve security ▪ Provide broadband networking compatibility ▪ Improve productivity ▪ Reliable
- 20. VPN : Disadvantages ▪ VPNs require an in-depth understanding of public network security ▪ VPN require more tools.
- 21. Applications ▪ 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
- 22. Future OfVPN ▪ 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.
- 23. Future ofVPN: Companies withVPN
- 24. References: ▪ http://vpn.shmoo.com/ ▪ http://www.uwsp.edu/it/vpn/ ▪ http://info.lib.uh.edu/services/vpn.html ▪ http://www.cites.uiuc.edu/vpn/ ▪ http://www.positivenetworks.net/images/client- uploads/jumppage2.htm All reference links have been checked so far and have been found running on 10-08-2013
- 25. References ▪ <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>. All reference links have been checked so far and have been found running on 10-08-2013