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Module 12: Virtual Private Networking

Module 12: Virtual Private Networking. Understand VPN VPN uses an insecure public network to handle secure private networking. VPN allows a traveling worker to connect to and utilize an organization’s LAN by using the Internet.

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Module 12: Virtual Private Networking

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  1. Module 12: Virtual Private Networking • Understand VPN • VPN uses an insecure public network to handle secure private networking. • VPN allows a traveling worker to connect to and utilize an organization’s LAN by using the Internet. • VPN establishes a secure pathway across the Internet from a client end to a server end. This is called a point-to-point connection. This is done with one of two protocols: • Point-to-Point Tunneling Protocol (PPTP) • Layer Two Tunneling Protocol (L2TP) Module 12: VPN

  2. Point-to-Point Protocol (PPP) • PPP is the foundation protocol for both PPTP and L2TP. • PPP provides the functions of compressing and encapsulating the information, and authenticating the users. • PPP is built upon two other protocols: • Link Control protocol (LCP) • Network Control Protocol (NCP) Module 12: VPN

  3. Prepare for VPN • For setup VPN, you need to have Networking and Remote Access Services (RAS) setup and running. • Check Networking and RAS hardware. • Configure Networking • Setup Remote Access Service – enable it Module 12: VPN

  4. Check Networking and RAS Hardware (on server) • At least one networking interface card (NIC) • Probably also a communication interface device • Modem or other devices (ISDN adapter, DSL adapter, or router) Module 12: VPN

  5. Configure Networking • TCP/IP protocol • File and Printer Sharing for Microsoft Networks • DHCP server (if needs) • Client for Microsoft Networks (if needs) • If you are using Active Directory, make sure you have the right setting for the user. Module 12: VPN

  6. Setup RAS • Configure and enable RAS • Make sure the local server has an upward-pointing green arrow. It means the server is enable. Module 12: VPN

  7. Setup a VPN server • VPN requires that you have RAS configured for VPN. • Configure RAS with VPN access. • Configure a PPTP or a L2TP server • using the ports properties • PPTP is easy to setup and can be used with a wide range of clients, from Win95 to XP. • L2TP can be used only with Win2k and up. It provides a higher degree of data integrity, data authentication, and data confidentiality. Module 12: VPN

  8. Setup a VPN client • Including two tasks: • Setup a connection to connect to the Internet • Setup a connection between the client and server • For WinXP and Win2k: • Using the New Connection Wizard • For Win9x/Me/NT • These operating systems can use only the PPTP VPN protocol • Using Dial-Up Networking window Module 12: VPN

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