Macbook Air Network Problem Caused by Firewall Setting on Router

Discussion in 'MacBook Air' started by stofect, Jan 14, 2013.

  1. macrumors newbie

    Dec 14, 2011
    Recently I moved to a new apartment and found that the wifi network is very slow on my macbook air (mid-2011, with Mac OS X Mountain Lion), but all other devices including Windows PC, iPad and iPhone are normal.

    Then I connected the Macbook Air to the router with a USB network adaptor and ethernet cable, but still very slow, quite strange. Also, I booted to Windows via boot camp, also very slow.

    I googled it, and found many people have similar problem, but no solution...

    Because it happened to my macbook only, and I think it is some compatibility issue between the router and macbook air. The router is from motorola and I think it is a cable modem.

    Finally, I decided to change some settings in the router, to check if it possible to solve the problem. Finally, I found it, the firewall setting.

    By default, the firewall protection is enabled. After I disabled it, problem solved.

    I share this experience and it may help someone else. And I also wonder that does anyone know the reason?

    BTY, I live in Mexico City now.

    Attached Files:

  2. macrumors 601

    Aug 27, 2012

    So I assume those are the current settings that work?

    What are the old (no work) settings looked like?
  3. thread starter macrumors newbie

    Dec 14, 2011
    It is old setting, the new setting disabled firewall option.

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