Rincks

Q: Self Assigned IP - Fixed, but help still needed, please

I'll add a bit of a back story first which I hope will help people understand my issue, but also hopefully lead people with a self-assigned IP issue to a fix (link is within the post)

 

I’m on on an iMac 20″ Mid 2007. I recently updated to OSX Lion after having wifi connection issues in Leopard. I used to randomly get kicked off my wifi and given a self assigned IP. With Leopard, the issue was fixed by applying a manual IP, router address etc and restarting. The issue would return months later, but I got over it after a few tantrums.

 

Then as soon as I updated to Snow Leopard, I instantly had no internet access and I could only upgrade to Lion if I downloaded system updates. So after a few hours of searching, I toggled my internet sharing ‘on & off’ and that was enough for that fix.

 

But then I upgraded to Lion and again, no internet. And nothing worked for me at all, every fix on the internet I tried failed. If my airport ever managed to connect to my router I would get a self assigned IP. Or it would say it was connected but there was no internet. So I hunted for hours and eventually found this:

 

Now, here is a fix for anyone who is having the same issue. I hope it works for you!

http://www.davidpierron.com/index.php/archives/2009/04/13/289/

 

This did work for me. The fix is to flush your ipfw through terminal, and it worked for me instantly.

 

However, I now have another issue that I really hope people can help me with. It's not as annoying as the above, but my god it's still very annoying!

 

Here are some bullets to show the tedious routine I have to go through in order to connect to the internet via my airport.

• I turn on my mac and my it tries to connect to my router automatically. But after a minute of trying, it says it can’t connect.

• I select my router manually from the list and have to enter my password manually, even though it is already saved in my Keychain.

• It then connects and says, ‘Connected but no internet’, so I leave it for two minutes and throw things around the room.

• After those 2 minutes it connects to the internet. But no, I can’t browse the web as the browser says 'DNS look up failure'.

• So I open terminal, enter 'sudo ipfw flush' to flush my ipfw and BINGO, I’m online 5 minutes after logging on to my machine.

 

The router I am using was only issued to me 8 months ago by my new ISP here in the UK, it connects via WEP and has always been stable for every other device I have connected to it. But I am going to ring up my ISP and see if there is a new router I can get.

 

If anyone - ESPECIALLY APPLE who seem to be shying away from admitting there has ever been an airport wifi issue - has any information to advise me, then please let me know.

 

Also if you are having a Self Assigned IP address issue and that fix above works, give the man some credit on his blog, and if you know him, give him a kiss from me!

 

Thanks

iMac, iMac 20" Mid 2007, OSX Lion

Posted on Jul 3, 2012 12:04 PM

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Q: Self Assigned IP - Fixed, but help still needed, please

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  • Helpful answers

  • by Mike Sombrio,

    Mike Sombrio Mike Sombrio Jul 3, 2012 1:10 PM in response to Rincks
    Level 6 (17,233 points)
    Apple Watch
    Jul 3, 2012 1:10 PM in response to Rincks

    Can you use WPA or WPA2 instead of WEP? I don't think Mac's play well with WEP. See here

    http://support.apple.com/kb/HT1126

  • by Rincks,

    Rincks Rincks Jul 3, 2012 1:18 PM in response to Mike Sombrio
    Level 1 (0 points)
    Jul 3, 2012 1:18 PM in response to Mike Sombrio

    This is one reason why I'm going to look for a new router. Unfortunately WPA is not possible on my router.

  • by Mike Sombrio,

    Mike Sombrio Mike Sombrio Jul 3, 2012 1:23 PM in response to Rincks
    Level 6 (17,233 points)
    Apple Watch
    Jul 3, 2012 1:23 PM in response to Rincks

    There are tips in the link I posted that will help you connect through WEP, it just isn't the best solution. It's old technology and not very secure.

  • by Rincks,

    Rincks Rincks Jul 3, 2012 1:38 PM in response to Mike Sombrio
    Level 1 (0 points)
    Jul 3, 2012 1:38 PM in response to Mike Sombrio

    Sorry, I should have mentioned, I have been through these and nothing's worked. I've tried adding speech marks etc but it just times out. It only works when I enter my password normally.

     

    I think a new WPA router is my next step.

  • by Mike Sombrio,

    Mike Sombrio Mike Sombrio Jul 3, 2012 1:47 PM in response to Rincks
    Level 6 (17,233 points)
    Apple Watch
    Jul 3, 2012 1:47 PM in response to Rincks

    A newer router that will connect through WPA2 Personal is optimal, if you can get one that would work best. Are you sure that your password is ASCII text and not hexidecimal? You might try the hex tips for entering the pass also just to be sure.

  • by Rincks,

    Rincks Rincks Jul 3, 2012 2:12 PM in response to Mike Sombrio
    Level 1 (0 points)
    Jul 3, 2012 2:12 PM in response to Mike Sombrio

    Yes it is hexidecimal in fact, the dollar sign is the only addition that will be accepted. To be honest you've made me realise that I've not actually tried it since flushing my ipfw, so hopefully that solves the issue.

     

    We live in hope.

  • by Rincks,

    Rincks Rincks Jul 3, 2012 2:20 PM in response to Mike Sombrio
    Level 1 (0 points)
    Jul 3, 2012 2:20 PM in response to Mike Sombrio

    Sadly, the issue still remains.

     

    Login in

    Airport can't connect

    I connect manually, enter password (which is still in my keychain)

    It connects but has not internet

    I wait

    It connects

    Browser has DNS look up issue

    I flush my ipfw

    I have internet.

     

    Madness.

  • by Rincks,

    Rincks Rincks Jul 4, 2012 1:21 PM in response to Rincks
    Level 1 (0 points)
    Jul 4, 2012 1:21 PM in response to Rincks

    Update:

     

    I spoke to my ISP to see if they had any newer routers and if they did WPA now.

     

    I have a new router on its way and they have updated my router to do WPA!

     

    The result?

     

    I now connect to my router automatically after a restart. No issue there.

     

    However,

     

    It still can't find the internet when it first connects.

    I still have to wait 2 minutes for it to find the net.

    I still have DNS issues once connected

    I still have to flush ipfw before it works correctly.