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Deco mesh has some devices unable to access internet following firmware

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Deco mesh has some devices unable to access internet following firmware

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Re:Deco mesh has some devices unable to access internet following firmware
2025-08-27 17:48:36

  @David-TP 

 

I have submitted my Deco APP log just now and confirmed my ISP

 

Thanks

 

John

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Re:Deco mesh has some devices unable to access internet following firmware
2025-08-28 01:54:33

  @JohnJB 

Thank you very much for the APP logs, and it has been forwarded to the senior engineers.

After further confirmation, it seems most of the reported users are using Virgin Media internet, and 194.168.4.100 is also the primary DNS server of Virgin Media. Somehow, it was accidentally blocked by the Network Security service.

The engineers have paid close attention to this feedback. I'll keep the forum updated once the solution is ready.

Thanks a lot.

Best regards.

 

▶Check What's Currently Going on With Deco ▶Parental Control Upgrade on HomeCare Models ▶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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Re:Deco mesh has some devices unable to access internet following firmware
2025-08-30 07:58:53

  @David-TP 

 

Exactly the same issue with my M9 Plus , upgraded to 1.9.1 last night and now getting CNC blocked IP to Virgin Media Primary DNS server, all devices seem to be working fine out to the internet and I can ping the Virgin DNS server also.

 

Most annoying now as it makes it difficult to see any threats blocked.

 

 

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Re:Deco mesh has some devices unable to access internet following firmware
2025-09-01 09:16:44

  @skimarqueshc 

Hi, thank you very much for your feedback.

For the CNC attack, it was due to the misclassification of the Virgin Media Primary DNS, and A new firmware update will be released shortly to address this issue.

Thanks a lot for your understanding and support.

Best regards.

 

▶Check What's Currently Going on With Deco ▶Parental Control Upgrade on HomeCare Models ▶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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Re:Deco mesh has some devices unable to access internet following firmware-Solution
2025-09-05 08:56:02 - last edited a week ago

Update：

This Article Applies to:

Deco M5;Deco M9 Plus

 

Hi All,

Based on the feedback we have received, there are three types of Security Attack notifications:

  • CNC Classification and the blocked IP is 194.168.4.100

It is dedicated to Virgin Media users, and 194.168.4.100 is one of the ISP's DNS servers. Usually, this security alert would not affect normal internet activities. In some cases, if users also have a Sky Q box, the Sky Q might be unable to access the internet. An official firmware has been released to fix this issue. Please make sure the firmware is up-to-date.

Deco M5_V1/V2/V3

1.9.1_build_20250909_Official

 

  • Classification: ICMP (CVE-2015-7759) 

  • Classification: SNMP(CVE-2002-0013)

Certain specific data packets accidentally triggered the Security Detection. A fixed patch has been updated in the cloud database.  Currently, users should be able to enable Network Security features again, and these attack notifications will not be triggered.

▶Check What's Currently Going on With Deco ▶Parental Control Upgrade on HomeCare Models ▶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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#16
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Re:Deco mesh has some devices unable to access internet following firmware
2025-09-05 13:04:35

  @David-TP 

 

Will new similar firmware be pushed out for the M9 Plus to fix the same issue.

 

 

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#17
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Re:Deco mesh has some devices unable to access internet following firmware
2025-09-09 08:57:22

  @skimarqueshc 

Hi, based on the explanation provided by the engineers, the CNC classification rule is not saved in the software like Deco M5, so Deco M9 Plus doesn't need an extra firmware upgrade.  It will be automatically fixed after the cloud data patch is updated.

Thank you very much.

Best regards.

▶Check What's Currently Going on With Deco ▶Parental Control Upgrade on HomeCare Models ▶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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#18
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Re:Deco mesh has some devices unable to access internet following firmware
3 weeks ago

Hi @David-TP 

I am also having the exact same issue since my M9Plus was updated to 1.9.1, with every device being quarantined due to the Virgin Media DNS being flagged, which is stopping my Sky Q from connecting to the Internet. So I've had to turn off the “Infected Devices Quarantine” feature, and I have also raised a support ticket - although I've just had an "AI-powered" answer so far, which isn't helpful in this situation!

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#19
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Re:Deco mesh has some devices unable to access internet following firmware
a week ago

  @LJunior 

@Simon-S 

 

Hi, thank you very much for your time and patience.

The latest news from the senior engineer is that the fixed security patch has been updated in the cloud server.

The previous security alerts should be fixed now. Please check whether you're still receiving the CNC as well as the CVE-related attack notifications.

Wait for your reply.

Best regards.

 

▶Check What's Currently Going on With Deco ▶Parental Control Upgrade on HomeCare Models ▶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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#21
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Re:Deco mesh has some devices unable to access internet following firmware
a week ago

  @DavidHall 

 

the great news is everything works and quarantine is now enabled.

 

the bad news is 4 of the 5 units show as offline (they're not, stuff is connected to them) 😂

File:
IMG_0114.pngDownload
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#22
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