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Deco M9 Invalid wireless password error and general connection to wifi problems

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Deco M9 Invalid wireless password error and general connection to wifi problems

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Deco M9 Invalid wireless password error and general connection to wifi problems
Deco M9 Invalid wireless password error and general connection to wifi problems
2019-07-03 07:45:46
Model: Deco M9 Plus  
Hardware Version: V2
Firmware Version: 1.2.8 20190403 rel. 43515

Have 3 Decos, 2 M5 and Main Deco M9, have removed 2 M5s from network and have continuing problems to connect from multiple IOS devices and Macbooks/Airs. As well as invalid password error. 

Have rebooted to factory settings and set up network again but continue to have problems. 

 

Regards

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7 Reply
Re:Deco M9 Invalid wireless password error and general connection to wifi problems
2019-07-03 08:20:16

Hi,

 

Like this thread, please email our tech support to get the firmware to give it a go. https://community.tp-link.com/en/home/forum/topic/164184?page=1&t=2019%2F07%2F03%2007%3A31%3A46%20%2B0000

 

Nice day. 

 

 

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Re:Re:Deco M9 Invalid wireless password error and general connection to wifi problems
2019-07-05 07:51:49
Hi Kevin, I contacted local TP link support in Spain, who weren't able to help, as they say I have the latest firmware. However I seem to have resolved the problem, at least so far. 1. Factory reset all Decos , 2 M5s and 1 M9. 2. This time as well as changing the password I changed the SSID from the same that I had been using since original set up, to say "TEST". 3. I have left all settings to default 4. Absolutely no problem connecting to all devices across all platforms and no disconnections......or password conflicts. 5. Is it possible that the SSID was causing a conflict across the network? cheers
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Re:Re:Re:Deco M9 Invalid wireless password error and general connection to wifi problems
2019-07-08 02:09:14

Hi Mad,

 

Thanks for your valued reply. 

 

Glad to hear that it works for now, and the wifi network name won't cause the conflict theoretically. 

 

You can take more time to test its performance and stability; any updates, just let us know.

 

Nice day. 

 

 

Nice to Meet You in Our TP-Link Community. Check Out the Latest Posts: Connect TP-Link Archer BE550 to Germany's DS-Lite (Dual Stack Lite) Internet via WAN Archer GE550 - BE9300 Tri-Band Wi-Fi 7 Gaming Router EasyMesh Is Available When Wi-Fi Routers Work in AP Mode as A Controller. Archer BE550 New Software Enhances System Stability and Optimizes MLO Network Stability. If you found a post or response helpful, please click Helpful (arrow pointing upward icon). If you are the author of a topic, remember to mark a helpful reply as the "Recommended Solution" (star icon) so that others can benefit from it.
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Re:Deco M9 Invalid wireless password error and general connection to wifi problems
2020-07-09 23:14:43

@Mad From TP-Link support: Go into Deco App, More->Advanced->IPv4,

  1. Turn off obtain DNS Automatically.
  2. Set Primary DNS to 8.8.8.8, 2nd to 8.8.4.4
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Re:Re:Deco M9 Invalid wireless password error and general connection to wifi problems
2020-07-21 18:44:26

@Mad 

 

Did you have special characters in the password? I bet they didn't test firmware with special characters in Wifi password and that causes problems with some devices. Just my hunch, but I'd bet on it. Now I'm stuck with some devices that can't connect and have to start setup all over. GRRR

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#6
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Re:Deco M9 Invalid wireless password error and general connection to wifi problems
2020-08-26 04:23:54

@Michael-YVR thank you, this works. 

Go into Deco App, More->Advanced->IPv4,

  1. Turn off obtain DNS Automatically.
  2. Set Primary DNS to 8.8.8.8, 2nd to 8.8.4.4
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Re:Re:Deco M9 Invalid wireless password error and general connection to wifi problems
2021-01-23 09:51:15

@zarkon 

 

Exactly. All deco models does not accept special symbols in password for the Wi-Fi. Tested. Besides the blocklist is nonsense. First block, then allow, like in standard routers. Have no idea why TP Link is so lazy and cannot provide the functionality into deco models since long time. Next thing they do not provide is the option to change the channel. Explanation that system is selecting the best channel is idiotic and there is no logic behind it. One more time they are lazy. Next thing is port 22 opened. It should be some random port not 22 for mesh. And who for a God sake is using root for ssh connection? It is a matter of time when the root password will be guessed, hacked or discovered and provided. This is the basic knowledge in Linux. Never use port 22 and never allow root to connect on 22. I have no idea who work in TP Link but I recommend them to learn fast. This is not how the security should work. The 22 port is used for mesh network with hidden SSID which is repeated on the same channel - next nonsense. 

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