Macbook Air Network Problem Caused by Firewall Setting on Router

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

  1. macrumors newbie

    Joined:
    Dec 14, 2011
    #1
    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.
     

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  2. macrumors 601

    Joined:
    Aug 27, 2012
    #2
    OK...

    So I assume those are the current settings that work?

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

    Joined:
    Dec 14, 2011
    #3
    It is old setting, the new setting disabled firewall option.
     

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