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Solution Enhancing Network Stability and Security Database Update in Deco M5/M9 Plus1.9.1

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Solution Enhancing Network Stability and Security Database Update in Deco M5/M9 Plus1.9.1

18 Reply
Re:Enhancing Network Stability and Security Database Update in Deco M5/M9 Plus1.9.1 Upgrade - Now?
a week ago

  @MrHomeAdmin 

 

I run a Deco X20 1.6.1 Build 20250831 Rel 77853

The Security issue for the firewall was on only on the new firmware released this year (with the Homeshield enhanced parental controls option now added for those still on Homecare)

 

Dropouts are happening (still get a couple) but its bearable - no more than what I was having before this FW. 

All firewall logs for internal LAN requests are gone since the Intrusion Protection was updated last weekend. 

 

Recommend to reboot all Decos and then reboot all devices

 

 

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#13
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Re:Enhancing Network Stability and Security Database Update in Deco M5/M9 Plus1.9.1 Upgrade - Disruption
a week ago - last edited a week ago

  ↵

  @David-TP 

 

Hi David. Here we go again, disruption that needs to be investigated.

 

Major block of internet access that might be possible to trace.

Log forwarded in Ticket TKID251109419

 

The question is

  • If Laptop is the issue, why isn’t the client isolated or blocked instead of complete WAN block?

  • What caused this disruption and block?

  • Its recommend to use Google's DNS. However the custom should be able to pick whatever DNS they want? Also a website blocked should not block the whole network/WAN?

 

UPDATE November 6th 08:00 . After doing some more research. It looks like TP-Link cant be used with any DNS service. This is way out of my knowledge zone and I am trying to understand the reason behind it.  Don't know why or who is to blame. Example There are plenty of posts online from others having the same experience. Also its not only the TP Link brand, looks like others can have the same issue. One of the DNS services, quad9, don't seem to work with example TP Link routers and some other brands. If I get the time I need to dig into why and where the problem sits.  

 

 

 

 

  Firmware 1.9.1 Build 20250926 Rel. 53742
1 When

Block: 5 Nov about 09:20:00-09:25:00

Internet returned working when checked 09:40:00 without restart/reboot of system.

Critical Log:
Wed Nov  5 08:26:59 2025 user.emerg syslog: tp215,22[20622]:
Wed Nov  5 09:21:58 2025 user.emerg syslog: tp215,22[25107]:
Wed Nov  5 10:00:37 2025 user.emerg syslog: tp215,22[17067]:
2 Did?

On the HP-Laptop, browsing to website from google search in Chrome browser. Visiting link: https://community.home-assistant.io/t/sonos-favorites/835866

The website cannot be reached.
DNS_PROBE_FINISHED_BAD_CONFIG

The same website could be reached after the block went away. No issue.
Was it random and coincidence it happened when browsing to this website?

On the HP-Laptop, browsing to website from google search in Chrome browser. Visiting link: https://community.home-assistant.io/t/sonos-favorites/835866

The website cannot be reached.
DNS_PROBE_FINISHED_BAD_CONFIG

The same website could be reached after the block went away. No issue.
Was it random and coincidence it happened when browsing to this website?
3 Client

Was used when event triggered. HP Laptop

Windows 11 Home
Version 25H2
OS version 26200.6899
McAffie installed

SSID: norrvana_surf
Protocol: Wi-Fi 5 (802.11ac)
Security type: WPA2-Personal
Manufacturer: Realtek Semiconductor Corp.
Description: Realtek RTL8822CE 802.11ac PCIe Adapter
Driver Version: 2024.0.10.223
Network Band (Channel): 5 GHz (44)
Aggregate Link Speed ​​(Receive/Transmit): 585/585 (Mbps)
IPv6 Address: fd4d:fb7c:da69:9b3a:6dd3:ff1d:351:12c4
Link-Local IPv6 Address: fe80::e737:30b2:288e:72c0%20
IPv6 Default Gateway: fe80::6232:b1ff:fed4:da08%20
IPv4 Address: 192.168.0.2
IPv4 DNS Servers: 9.9.9.9 (unencrypted)
149.112.112.112 (unencrypted) encrypted)
Physical Address (MAC): (ask for in Private msg)
4 Disruption
  • Client did not reach website
  • Whole Network was blocked from Internet.
  • Check if I had connection with ISP via the access PRE Deco Router and no indication of disruption, havent been disconnected.
  • Clients stopped working as example Sonos stream stopped, other PC could not reach anything online. 
  • Can login to Deco app internally but don’t think it was up to date. Not local as it doesn’t update or indicate anything.
  • No internet connection indicated on iPhone

 

************************************************************ TimeZone UTC/GMT + 1 M5 * 6 units with IoT setup. Both wired and wireless backhaul.
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#14
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Re:Enhancing Network Stability and Security Database Update in Deco M5/M9 Plus1.9.1 Upgrade - Disruption
a week ago

  @MrHomeAdmin 

Hi, I hope you can give an update on the support ticket# TKID251062808, as the case has been escalated to the senior engineer directly(the APP log was also merged into TKID251062808 ).   I can no longer help with the logs, and the engineer will continue to provide further assistance.

Thank you very much.

Best regards.

 

▶Check What's Currently Going on With Deco ▶Deco X50_V1_1.8.0 Significantly Expanded the Client Connection Details and Added Channel Selection ▶Deco BE85 1.2.0 Enhanced Mesh Backhaul Stability and Device Roaming Experience ▶Deco BE65/BE65 Pro 1.2.0 Enhanced Mesh Network Stability and System Security ▶Deco BE75 1.1.0 Added WireGuard VPN, Manual Channel Selection and More Try to leave a Message if urgent help is required.
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#15
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Re:Enhancing Network Stability and Security Database Update in Deco M5/M9 Plus1.9.1 Upgrade - The End
a week ago

  @David-TP 

Thanks. Grateful for all your help and for responding to our cry for help.

 

However after all the problems, previous ones + the resent major disruption caused by firmware updates in September/October. It has caused so much trouble. It has been unacceptable. After all the time spent troubleshooting, writing on this forum... All confidence in your company and products are gone. ALL TP-LINK products are now going in the trash.  

 

The network and Deco's will be replaced asap, I am currently looking at a new system. Top priority.

 

Good luck to everyone.

************************************************************ TimeZone UTC/GMT + 1 M5 * 6 units with IoT setup. Both wired and wireless backhaul.
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#16
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Re:Enhancing Network Stability and Security Database Update in Deco M5/M9 Plus1.9.1 Upgrade - The End
Monday - last edited Monday

  @MrHomeAdmin 

Hi, thanks a lot for the update.

After the recent security database update, you might notice the reported Malware issue here has gradually phased out. But we still apologize for any inconvenience this may have caused.

As you also mentioned that the disconnection of Deco also coincides with the disruption of the internet provider, there is no conclusive evidence that the latest firmware of Deco would be a culprit. Further troubleshooting indeed can be time-consuming. In case there is a potential hardware issue due to prolonged usage, it is also recommended to reach out to the local support team to check for warranty service(Deco has a 3-year warranty in Sweden).

Thank you very much for your understanding and support.

Best regards.

▶Check What's Currently Going on With Deco ▶Deco X50_V1_1.8.0 Significantly Expanded the Client Connection Details and Added Channel Selection ▶Deco BE85 1.2.0 Enhanced Mesh Backhaul Stability and Device Roaming Experience ▶Deco BE65/BE65 Pro 1.2.0 Enhanced Mesh Network Stability and System Security ▶Deco BE75 1.1.0 Added WireGuard VPN, Manual Channel Selection and More Try to leave a Message if urgent help is required.
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#17
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Re:Enhancing Network Stability and Security Database Update in Deco M5/M9 Plus1.9.1 Upgrade
Monday - last edited Monday

  @David-TP 

 

A factory reset did fix it. But what caused the unusual break in the first place? I only started using Deco m5 about 1 year ago. It was a pain to setup the whole network again including resetting all 3 other Deco units. 

 

Secondly, with 1.9.1,the Deco app doesn't display the clients correctly. Many online clients are shown as offline. 

 

I have tried the new beta firmware 2509, but with that firmware, my internet connection will become unstable and become unavailable every 5-10mins. Downgrading firmware fixed that issue. 

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#18
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Re:Enhancing Network Stability and Security Database Update in Deco M5/M9 Plus1.9.1
Wednesday

It's been about 2 months with serious issues with my M9 plus network following firmware 1.9.1.  Despite my messages to TP-Link including logs nothing has been resolved in 2 months.  Similar to others I've decided to abandon my M9 plus network and have now replaced my mesh network with an alternative manufacturer - the result is that all my issues were resolved instantly. All my network devices are now working again.

 

I feel as others very much let down by tp-link regarding my M9 plus network which worked perfectly well until firmware 1.9.1 was released. You have lost another tp-link mesh user, never again!

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#19
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Re:Enhancing Network Stability and Security Database Update in Deco M5/M9 Plus1.9.1
Thursday

I also have problems with the latest Deco M9 Plus firmware V1.9.1 Build 20250612 Rel. 45690.
I use the Deco in Access Point Mode.

 

I upgraded from firmware V1.6.4 to V1.9.1 (did not change any hardware-related things), and noticed that from now on the webpage http://tplinkdeco.net was not reachable anymore via Firefox (which I always used).
 

Furthermore, using the Deco-app on my mobile phone, I noticed that with V1.9.1 some clients (not all) do not have their IP-address shown (see att. picture), although these clients do function well.
Resetting all the hardware (Deco, Modem/Router, Switch, Mobile phone and all clients) did not solve the IP-address-issue.

 

Downgrading the firmware to the previously used V1.6.4 immediately solved this: now all client's IP-addresses are shown again.
And http://tplinkdeco.net (via Firefox) also does work again.

 

Regards,

Wim.


No IP-address shown

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#20
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