Changed SSID and Pwd, but old devices still connecting to new SSID

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Neil P

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Nov 4, 2014
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4,510
I was asked to go to a friends house the other day to access the WebGUI of their new fibre router.
A Technicolour something or other, They was Ted to change the SSID from TCNq12345xyz or what eve the default was to something more descriptive

They could not access it at 1921.168.1.1. They were only trying via wifi connected devices and for some reason could not get on...so I went up connected via hardware and got it done.

They had all their home devices connected...so three mobile phones...Samsung, and other android devices, X 2 apple MacBooks and a toshiba laptop. All connected to the WiFi via the old SSID and password.

So I changed the SSID and the password to AstridHouse and password to the names of their kids.


I then logged on to the Wifi with my laptop, with the new SSID and pwd. My laptop had never connected to the original default SSID...It asked for pwd and I connected successfully.



Now this is the weird thing...all the other devices be they Samsung, or Apple or Toshiba or Huwea....they all stayed connected to the WiFi network ..despite the SSID and password change.


What sort of mystical sorcerecy is this that propergated the new SSID and pwd to the old devices.

 
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stu17323

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Sep 6, 2017
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Honestly, it's either that or cosmic rays in my opinion.

 
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BuddhaSkoota

BuddhaSkoota

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Aug 16, 2014
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It's possible those devices originally connected via WPS. If so, you should disable WPS on the router and reconnect those devices using the SSID/pwd.

edit for clarity
 
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BuddhaSkoota

BuddhaSkoota

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Aug 16, 2014
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If it's not WPS, then it could be a bug in the router's firmware. I'd recommend checking that it has the latest version installed.

Out of curiosity, was the old SSID visible after you changed to the new SSID? Did you reboot the router after the change? Is this a dual-band router?
 
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N

Neil P

Reputable
Nov 4, 2014
14
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4,510
Yes, I have had Macs for years, and not seen a WPS option.

Maybe it is some thing to do with the router firmware.. recognising old MAC address and allowing connection, propagating the PWD..no idea.

But not seen this before and all the devices that were connected before to that new router all connected to the new SSID and PWD without needing to enter the details.

This was confirmed when the partner arrived home..with a device that had not been in the house during the SSID and PWD change. it too automatically connected to the new SSID with eh new pwd.

Bloody bizzarre...b
 
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Neil P

Reputable
Nov 4, 2014
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4,510
Hah...just the the 'customers' house..went to check it was upto date and yes, as far as I can see it is. it is but did not take note of the version...


Ah well... will have to remain one of those mystery's

all is working there now, and if new people turn up , they have to find the WiFi net and enter the password...so it is secure...just auto allows previous devices to connect

 
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