Sharing my internet connection......

Discussion in 'Mac Basics and Help' started by flyguy451, Apr 4, 2007.

  1. flyguy451 macrumors regular

    May 3, 2005
    My present configuration is that both my iMac and my Macbook connect to the outside world through an Airport express which is wired to a cable modem. I'd like to take the Airport express with me on the road. Apparently, I can setup the system so that the iMac is wired to the cable modem and the Macbook connects to the web through the wifi capability of the iMac. I have read the help file on how to do this and it does not seem too difficult however there is a caveat about possible problems;

    "IMPORTANT: If your Internet connection and your local network use the same port (built-in Ethernet, for example), investigate possible side effects before you turn on Internet sharing. In some cases (if you use a cable modem, for example) you might unintentionally affect the network settings of other ISP customers, and your ISP might terminate your service to prevent you from disrupting their network."

    I don't want to be terminated so I called my ISP's technical service line and inquired. Of course they have no clue about anything Apple so after explaining what I was planning to do I emailed the tech guy the help file. The next day I received a reply saying that they did not support any sort of internet connection sharing! I suspect that they have misunderstood what I want to do. There is really no difference for them if I connect with two computers one way or the other. I think they are just saying "don't do it" because they don't know what it is.

    I'm just looking for advice; is this a good way to set up my system? are there any other considerations? will this actually cause any problems with my ISP? etc?

  2. apfhex macrumors 68030


    Aug 8, 2006
    Northern California
    I have no idea what they're talking about. Internet sharing is extremely simple. I use the Airport card in my Mac Pro to provide wireless internet to my Wii and occasionally my PBG4, without the need of a router. The MP's connected directly to the cable modem. It works great.

    "If your Internet connection and your local network use the same port (built-in Ethernet, for example)"
    I don't understand this, really... maybe a networking expert can chime in.
  3. cayley macrumors member

    Mar 29, 2007
    By officially not supporting sharing a connection... they don't have to bother with these types of tech support issues.
  4. FJ218700 macrumors 68000


    Mar 8, 2007
    Blue Dot, Red State
    I've been running this setup for over a year with no problem with a DSL ethernet connection into my G4 Tower, broadcasting on a specific channel to my laptops. However, I once set up the same configuration from a cable model into a PB G4, and the modem connection was terminated. Had to call the ISP to get it restarted. They asked specifically if I had been sharing wirelessly without their specific wireless modem.

    I would just try it and see.

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