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Internet Connection Sharing Hugh Taylor Support Professional Platforms Support Microsoft Corporation

Internet Connection Sharing Hugh Taylor Support Professional Platforms Support Microsoft Corporation. Overview. Benefits of home networking Topology of Internet Connection Sharing (ICS) How ICS works

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Internet Connection Sharing Hugh Taylor Support Professional Platforms Support Microsoft Corporation

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  1. Internet Connection SharingHugh TaylorSupport ProfessionalPlatforms SupportMicrosoft Corporation

  2. Overview • Benefits of home networking • Topology of Internet Connection Sharing (ICS) • How ICS works • How to set up and configure ICS in Microsoft® Windows® 98 Second Edition, Windows Millennium Edition, and Windows 2000 • Issues to be aware of • Phone line networking caveats

  3. Benefits of Home Networking • File sharing – optimizes available hard disk free space • Use of peripheral devices from any computer – scanners, printers, tape drives • Collaboration, cooperation • Multiplayer games • Wired household

  4. Anatomy of a Home LAN Printer Scanner WebCam Hub • Internet • Universal Plug and Play

  5. Benefits of ICS • Multiple computers use a single Internet connection • Private IP addressing masks IP addresses to prevent attacks • ICS host forwards requests from ICS clients to Internet, and forwards replies from Internet to ICS clients, only computer visible • Cost versus multiple connections

  6. General Topology • Home network with all computers connected by Ethernet, phone line, or wireless • One computer set up as the ICS host and which has the connection to the Internet • ICS host shares its Internet connection, and assigns private IP addresses to clients • Remaining computers set up as ICS clients • ICS host routes traffic from clients to Internet

  7. General Topology ICS Client 1 Modem ICS Host Hub Internet ICS Client 2

  8. How Network Address Translation Works • ICS host assigns clients addresses from the Private IP class C address pool • ICS host maps IP addresses of clients to dynamic port numbers • ICS host forwards requests from clients to Internet • ICS host forwards replies from Internet to client

  9. How Port Mapping Works Port Map: X = 2958 Y = 3256 Z = 4223 ICS Host 192.168.0.X Example: 10.0.0.1 ICS Client 1 192.168.0.Y Assigned by ISP ICS Client 2 Internet 192.168.0.Z

  10. How Host Forwarding Works Port Map: X = 2958 Y = 3256 Z = 4223 to Microsoft.com from port 3256 • Host forwards packets to port 3256 to 192.168.0.Y which is Client 1 • Host forwards packets to port 4223 to 192.168.0.Z which is Client 2 from Microsoft.com to port 3256 to Yahoo.com from port 4223 Internet from Yahoo.com to port 4223 ICS Host

  11. Installing Windows 98 Second Edition

  12. Installing Windows 98 Second Edition (2)

  13. Installing Windows Millennium Edition

  14. Installing Windows Millennium Edition (2)

  15. Installing Windows 2000

  16. Installing Windows 2000 (2)

  17. Configuring Windows 98 Second Edition

  18. Configuring Windows 98 Second Edition (2)

  19. Configuring Windows 98 Second Edition (3)

  20. Configuring Windows 98 Second Edition (4)

  21. Configuring Windows Millennium Edition

  22. Configuring Windows Millennium Edition (2)

  23. Setup Caveats, Tips, and Issues • Ensure that your ISP supports ICS • Finish the Internet Connection Sharing Wizard, or uninstall ICS to prevent upgrade issues • Only one ICS host needed • Virtual LAN drivers common with Windows 2000 and PPP over Ethernet (PPPoE) • Get the latest version of PPPoE software for your DSL or cable modem connection

  24. Networking Caveats, Tips, and Issues • NetBIOS naming conventions for machine and workgroup names • Browsing issues • Protocol and binding issues • Static IP addresses • Did I mention, use the wizards when possible?

  25. Networking: VPN and ICS Internet ICS Client hub Internet ICS Host If a client establishes the tunnel ICS Client

  26. Networking: VPN and ICS (2) To VPN Server ICS Client hub ICS Host Internet If the host establishes the tunnel ICS Client

  27. Phone Line Networking • Cabling • Utilities using the phone line for meters • Extensions versus separate lines for voice

  28. Other Caveats • Multiplayer games • Secure sites • Customized sites

  29. Basic Troubleshooting • Host only on one computer? • Do any computers have connectivity? • PING – to what can and can’t you PING? • If a client can’t connect to a server, can the host connect to that server? • To resolve many problems either reconfigure the host, or uninstall and reinstall ICS on the host

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