Sudden Loss of Internet Connection to Airport

I am having a similar problem to Fred55 (four posts down). My computer however, before it "fixes" the problem of accessing the airport says,
"An application named airport needs to access your keychain but there is an existing version. Do you want to change all your keychain items to allow the new version access to your keychain?"
-It then gives me the options Don't Change or Change.
So far, I have always said Don't Change, and then clicked on Allow Always, but then it seems to go back to the same loss of connection if I turn my computer off. I have looked at where it would change to, and it shows this:
System/Library/Private Frameworks/Apple80211.framework/VersionsA/Resources/airport. The difference being that the new version that the computer wants me to change to has versionA in it.
If you havent noticed I am not Mac saavy and could use some help. Should I instead of clicking Dont Change click the Change and let it move all the keychains to this VersionA business? Thanks for your input.

mulrich, Welcome to the discussion area!
Should I instead of clicking Dont Change click the Change...
Yes

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I have been having problems with the internet connection via Airport Extreme which I find it a bit unusual and its still driving me nuts! This is what happened:
I have lost my internet connection last Sunday evening upon my return from a weekend away from home. The last time I have used the internet connection on my macbook was the previous Friday morning. Prior to the apparent disconnection on Sunday, I have always used my internet connection wirelessly through Airport Extreme (that is connected via ethernet cable to the NETGEAR DG834v2 ADSL modem which had worked beautifully until the problem arose on my return). This wireless internet connection allowed me to surf the internet anywhere in my home.
However, upon the successful re-connection to the internet via the modem router, I have discovered several new problems. I have tried to set up the internet connection wirelessly again but instead the following happened:
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2. Router connects to ADSL fine when computer is connected to it via Ethernet. (However, router disconnects when magsafe power adapter is taken out for some inexplicable reason!)
3. Router connects to ADSL fine when nothing is connected to the router (ie. No Ethernet connections)
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So from the above, I cannot connect to the internet properly whether wirelessly or not so I suspect it could be faulty router or could it be airport extreme? I have asked my ISP for an explanation and all they have said is that it cannot be the mis-configuration but could be to do with the power adaptors or the way plugs are set up and suggested I take out all the power plugs (and power surge protector) out to switch everything off, the macbook, router, printer and airport extreme. However, when I have re-plugged them all back in, the problems I have described above still persists!
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Hi @BMATH
Thank you your query.
I understand that after updating to Windows 8.1 about every 6 weeks you loose wireless connectivity for no reason and the web pages are very slow to open. If you uninstall and reinstall Windows 8.1 it works fine again for about the same amount of time. You have done this about 4 times with the same result each time.
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Microsoft Malicious Software Removal Tool
Microsoft Safety Scanner
After updating to Windows 8.1 have you checked for Windows updates?
Have you ran HP Support Assistant ?
Here is a link to Troubleshooting Wireless Network and Internet (Windows 8) that may also help.
If the issue should remain please contact HP support for assistance.
Please call our technical support at 800 474 6836. If you live outside the US/Canada Region, please click the link below to get a support number for your region.
World Wide Phone Support
Best of Luck!
Sparkles1
I work on behalf of HP
Please click “Accept as Solution ” if you feel my post solved your issue, it will help others find the solution.
Click the “Kudos, Thumbs Up" on the bottom right to say “Thanks” for helping!

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Message was edited by: leino88
Message was edited by: leino88

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Message was edited by: pbranda

Let's double-check your Mac's Internet Sharing settings ...
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Setup the Network
Cable Modem > (Ethernet cable) > \[Ethernet port] Mac > (wireless) > PS3
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Connect the AirPort Express (AX) to the cable modem via Ethernet cable.
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I have an almost new 24" Imac and I have been having connection issues recently with Comcast and I am going, no wait am insane. I had a Belkin router that was going flaky and got a new one but it was worse than the old one and after trying no router for a week and no lost connections I bought a Linksys and it was great for about 3 weeks and then suddenly loss of connection again. I used to have both a G4 QS733 and also an Intel Mini that had similar problems, the Mini was so bad in fact I ended up exchanging and selling the new on Ebay without even opening it up. I have replaced EVERYTHING in the past year startiing at the pole every cable and ethernet cable as well as the modem and the router (3x on that) and the computer has been changed out. I noticed when this happens my pc is still able to connect which makes it even worse because it all leads back to the apple being the problem. I noticed the problem returned a few days ago and I think it was right after a bunch of updates ( I currently am running 10.4.10) so maybe that is the problem??? Just seems weird to have a total of 8, yes 8 macs have the exact same problem but I have had about 40 different pc based laptops hooked to the same connection at various times and NONE had a problem. I get the feeling this is a simple incompatibilty issue between the Apple and the routers but I am out of ideas.
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Hi Tim Hartzell!
I may be off-base here, and my apologies if so, but I have a feeling you're having exactly the same connection issue with each of your Macs, not because they are not compatible, because they are in fact compatible, but due to misunderstanding how to perform one particular step of the initial setup of the Mac. This comment is not meant to slight you, as at one point I did EXACTLY the same thing and had the same results (I once used Comcast), and that's why I'm answering your question.
This isn't unusual if during setup of a Mac (the Welcome! procedure/program) you incorrectly identify and answer the question at the top of one particular page in the setup process:
"How Do You Connect to the Internet?"
Recall that one?
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The above will change none of the previous settings in other configurations that are maintained in the Network panel of System Preferences. The name of each of those different configurations is displayed in the "Location:" selector for you to choose how you wish to be connected. You should now see on that selector the name you earlier gave this new configuration - "ethernet to router"
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Once you have a working configuration, be careful not to edit any of its particular settings followed by clicking the "Apply Now" button, as that will alter the configuration so that it may no longer work.
Rather than haphazardly editing a working configuration, it's less confusing to simply initiate an entirely new configuration, as you've just done above. If that would then continue to work better for you, say for a month or so, then the prior configuration, and other old configurations, may no longer be necessary, and can be deleted from the "Location:" selector.

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Hello,
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On one MacBook Pro (and possibly others, haven't had them available to test yet), trying to connect to WiFi while downstairs (i.e. to the AirPort Extreme) yields a strong wireless connection, but "no Internet connection"; checking via network diagnostics or the Network panel reveals that the MacBook Pro has no IP address. This seems odd, as it happens even if the connection is first made on the 2nd floor to the Time Capsule, where a valid IP is retrieved, and then carried downstairs; even though the same IP address should be valid, the laptop's WiFi menubar icon starts cycling again and eventually shows the "!" and reports no Internet connection. Checking the Network panel reveals no IP address via DHCP. However, if I let it sit for a minute or two, the IP address comes back (the same one!) and all is well, at least for a while.
I've tried switching to a manually-assigned static IP as a workaround, and that works perfectly well, but I'd like to get DHCP working properly if I can, for convenience's sake. Is there any reason why I should be having trouble with getting DHCP from the Time Capsule via the AirPort Extreme?

Actually, yeah, my predecessor explained that he was running DHCP on the Time Capsule instead of the Netgear because he hadn't needed DHCP prior to the adding of a WiFi point (all other nodes were on Ethernet), so it had always been turned off on the Netgear. But your suggestion makes a lot more sense, of course, so I've put the Time Capsule into bridge mode as well and started the DHCP server on the Netgear. Seems to be working with my iPhone, though that was always working okay. I won't have access to the laptop to test it until later this afternoon, but I have high hopes.
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jdmein wrote:
First, before I get into too much detail: Is it even possible to set up a WPA2 network directly from the iMac without a separate router?
Welcome to Apple's discussion groups.
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Anytime you change networking hardware, it is always a good idea to perform a complete power recycle of your networking components.
I would recommend that you do the following as a minimum:
Power-down the modem, AirPort base station, and computer(s).
Disconnect the AirPort base station from the Internet broadband modem.
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Power-up the modem; wait at least 10-15 minutes to allow it adequate time to initialize.
Power-up the AirPort base station; wait at least 5-10 minutes. Note: The AirPort's status light may continue to flash amber after it has intialized. That is because, there may be some additional configuration items necessary, like setting up wireless security, before the overall setup is completed to get a green status.
Power-up your computer(s).
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Sudden Loss of Internet Connection to Airport

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