Virtual Private Networks Manraj Sekhon

What is a VPN?

How It Works Uses Public Telecommunication Infrastructure (internet)

History of VPN’s Developed in the late 1990’s

Remote Access VPN User-to-Local Area Network Connection (LAN) Enterprise Service Provider  Network Access Server

Site-to-Site – Intranet Based LAN  WAN One or More Remote Locations

Site-to Site – Extranet Based Relationships such as a Partner, Supplier or Customer

Security Firewalls

Tunneling Designed to Provide a Secure, Encrypted Tunnel

Encryption Public-Key Encryption Symmetric – Key Encryption

IPSec or GRE Internet Protocol Security Generic Routing Encapsulation

Authorization User-Ids, Passwords and Controls

VPN Technologies NAS, Firewalls, PPTP, L2TP, IPSec, SOCKS etc.

Benefit - Scalability Add new user’s/offices/processes with Ease Mobile, can access from anywhere

Benefit - Security Firewalls, Encryption, Internet Protocols

Benefit – Cost Effective Cheaper than using Leased Lines

Drawback - Knowledge Requires extensive knowledge about public network security, encryption etc.

Drawback – Limited Control Reliance on ISP’s and Third Parties

Overall Connects Employees and Offices Around the World Extremely Mobile and Cost Effective

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