Wfi password changed but old devices still connected.

[bibin_kurian]

Already reboot the device but all are connected.

 

[bill001g]

Try to disable WPS on the router. If the end device have that code the router will just give them the new password.

 

[kanewolf]

MERGED QUESTION
Question from bibin_kurian : "Hi i change my friends wifi password but some external guys still connected to the wifi.....?"

Hi i change my friends wifi password but some external guys still connected to the wifi.....? How..?? And what can i do for that...?

A reboot of the router after the WIFI and administrator password change will disconnect all devices. A MAC address may still show up in the list, but it isn't connected, it just attempted to connect.

 

[scout_03]

also in the router put the mac address of our friend device on wi-fi permit list so others should not be able to connect .

 

[ex_bubblehead]

also in the router put the mac address of our friend device on wi-fi permit list so others should not be able to connect .

MAC address filtering is not considered a valid security measure. Anyone with any knowledge can locate and spoof a valid MAC address in seconds, thus bypassing any filtering.

 

[kanewolf]

The question is, why do you think the "rogue" device is connected? Does it show up in the IP list? Can you see traffic from the device? A MAC address can show up in the device list without being fully connected to the network.