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Virtual Private Network(VPN)

Virtual Private Network(VPN) . Presented By Aparna Chilukuri. What is a VPN? . A VPN is a private network that uses a public network (usually the Internet) to connect remote sites or users together. What Makes a VPN?. Remote Access Site-to-Site Intranet Extranet Secure VPN

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Virtual Private Network(VPN)

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  1. Virtual Private Network(VPN) Presented By Aparna Chilukuri

  2. What is a VPN? • A VPN is a private network that uses a public network (usually the Internet) to connect remote sites or users together.

  3. WhatMakes a VPN? • Remote Access • Site-to-Site • Intranet • Extranet • Secure VPN • Trusted VPN • Hybrid VPN • Provider-Provisioned VPN

  4. VPN Security • authentication—ensuring that the data originates at the source that it claims • access control—restricting unauthorized users from gaining admission to the network • confidentiality—preventing anyone from reading or copying data as it travels across the Internet • data integrity—ensuring that no one tampers with data as it travels across the Internet

  5. What is Tunneling ? • Tunneling is the process of placing an entire packet within another packet and sending it over a network. • Tunneling requires three different protocols: • Carrier protocol • Encapsulating protocol - GRE, IPSec, L2F, PPTP, L2TP • Passenger protocol - IPX, NetBeui, IP

  6. VPN Protocols • Remote Access • PPTP(Point -to -Point Tunneling Protocol) • L2F(Layer 2 forwarding) • L2TP( Layer 2 tunneling Protocol) • Lan-to-Lan • IPSec

  7. IPSec Uses • Diffie-Hellman key exchanges to deliver secret keys between peers on a public net • public-key cryptography for signing Diffie-Hellman exchanges, to guarantee the identities of the two parties and avoid man-in-the-middle attacks • data encryption standard (DES) and other bulk encryption algorithms for encrypting data • keyed hash algorithms (HMAC, MD5, SHA) for authenticating packets • digital certificates for validating public keys

  8. Conclusion • Loopholes • Hackers will try to "piggyback" onto an existing VPN connection that a remote worker has established, either inserting viruses into a system or removing and viewing sensitive files

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