Implementing VPN Virtual Private Networks for Small Offices/Organizations

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The document tries to show the challenges, the benefits costs and the security implications that come up with the Virtual Private network TEchnology.


  • 1. IMPLEMENTINGA LOCAL AREA NETWORK (LAN) BETWEEN REMOTE OFFICES USING VIRTUAL PRIVATE NETWORK (VPN)What challenges, benefits, cost and security implications there areSovello Hildebrand Mgani IT Consultant - FUGIT

2. Outline: Definitions: LAN, VPN, WAN, etc. Connecting distant-located offices: what optionsthere are. VPN: Advantages VPN: Options VPN: How it works VPN: Challenges 3. Definitions LAN: (Local Area Network): covers a small area.Usually confined to a small building or severalbuilding concentrated at one place. VPN: a private data network that uses existingtelecommunication infrastructure. VPN and Privacy: is achieved through the use oftunneling protocols and security procedures. WAN: (Wide Area Network): covers a largergeographical area. It was the option fordecentralized organizations before. 4. Connect distant offices An organization can have offices distributed arounda metropolitan. Before, these offices would connect using leasedlines: imagine there being 10+ branches of thesame organization. VPN came out as a solution. Each office needs tohave its own internet connection so that VPN cancreate its tunnel through. 5. VPN: Advantages Reduced costs: running costs, only startup costsmay be high e.g. buying a server (only if need be) Scalability: new offices can be added withouthaving to worry about the capacity of theconnection line. Only the internet is needed. Flexibility: allows working from any point in time:at home, along the road, outside the country, etc. Performance: the data transfer rates depends onthe speed of the internet connection to the office. Compared to the case of a leased line. 6. VPN: Options Site-to-Site VPN: Remote Terminal: 7. VPN: How it works There needs to be an internet connection. VPNuses existing telecommunications infrastructure. VPN creates a tunnel through the internet fromone office/site to another. The traffic through thistunnel is encrypted to protect any sensitive data. Each network can connect to the main officesnetwork and then to the other branch offices. Requirement: Internet connection, a VPN server foreach location, and an IP address to authenticate to. 8. Picture: Courtesy of 9. VPN: Challenges Cost: setup costs may be very large, howeverrunning costs are reduced to a minimum. Security: though VPN creates a tunnel in theInternet, it is still possible to be interfered if atall the network access credentials are not keptconfidential.


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