Wireless authentication

MichaelLGW · Jul 6, 2014

My Tab 2 (GT-P3110) no longer connects to my wi-fi router. It was fine when I went to bed and turned it off, but the next morning when I turned it on and switched the wi fi on it refused to automatically authenticate. It prompted me for my network password which I provided then told me that authentication had failed.

I have tried forgetting the network; I have tried resetting the wireless router (which works just fine with a couple of Windows laptops and an Asus Android tablet using the same password). Wireless reception from the router is shown as strong, so it looks like the wireless hardware is OK.

I have been round this circle many times with the same result. I really do not understand how something could change within the device overnight when it is switched off.

The question I cannot answer yet is whether or not it will connect to any other wireless network - I'll have to wait until the local library opens again in 2 days time, and they don't expect a password anyway.

I've looked all over the internet and seen a hard reset suggested a few times - but can't find anyone who says "I tried it and it worked". Does anyone have a tried and tested solution please ?

Michael at LGW

hkmk23 · Jul 8, 2014

I think you will find that your router had identified your device (Tab2) and issued it with an IP address. When you turned off your Tab another device on your network was issued with the same IP address so when you turned your Tab back on your router refused to recognise your Tab's IP as it now belonged to another device. At least that is the only explanation I could come up with.
The solution - to manually issue your Tab with a fixed IP address that you know is not in use on your network, your router should accept this.
If continuing with a fixed IP is not acceptable, once you have successfully logged on you can log off and revert to DHCP so the router issues another IP of it's choice. At least it worked for me.

MichaelLGW · Jul 8, 2014

Many thanks. I'll have a go, though I can say that if another device borrowed the Tab's IP address overnight it must surely have been someone who hacked into my network ! Only one item is connected to the network overnight, a laptop that runs 24/7.

I always have trouble getting my router to do anything non-standard. It's a Virginmedia one and I'm convinced they have doctored it so that any settings other than ones they preset don't "take" when you try to change them (the WPA password excepted). The manual carefully does not go into detail about bespoke settings, and you have to download the original manufacturer's manual to try anything. I have previously tried (and failed) to set a fixed address for a laptop so it could be accessed by an external program that required this But in any case, surely resetting the router as I did (by unplugging it for 5 minutes) would have made it forget all the DHCP assigned IP addresses ? Doesn't the D stand for "Dynamic" ?

Maybe I'll try turning everything off then just turn the Tab on: the IP the router expects for it should then be free, right ?

Sadly I walked past the library today and realised that I had forgotten to bring my Tab with me. It's an age thing.

Watch this space.

Michael at LGW

hkmk23 · Jul 9, 2014

I find it takes a lot longer than 5 minutes to reset/change DHCP addresses, I appreciate your comments on Virgin, in France if you do not use a Livebox with Orange(France Telecom) you are on your own, I currently use a Cisco router so I am probably sharing all my thoughts with the NSA! Just as well I am honest and legal!

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Wireless authentication

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