Hey @SimonGA,

This happend with my X73-DSL and still continues now I use the XE75 Pro Deco's.

The only way I can improve it is by connecting using the Cisco VPN client as well as Zscaler, which seems counter intuitive with expecting a VPN to slow network traffic.

With Zscaler I get 2-6mbps Upload, when using VPN + Zscaler I get 400-800mbps Upload

 Hi @David-TP 

That's very interesting thanks.  I'm not sure what you mean by "please refer to the message box "?

For anyone interested, the Firmware David has suppied seems (Fingers crossed) to have solved my problems.  Previosly sites protected by SSO on my work laptop were just unusable, now they work perfectly.  I even have Homeshield enabled without any problems.

Hopefully whatever this fix is will make it into the default firmware, which will save many frustrating hours for people in future....

  @David-TP I have the same zscaler issue on my X73-DSL - the link takes me to "Pre-Released 1.3.1 Firmware for Deco X50/X55" will this also work on the X73 or is there another pre-release firmware for it?

  @dandyfop My X73 is on v 1.0.5 firmware and I think that must be the version that David gave me. When I saw a new firmware for the X73 had been released I assumed the fix would be included so I upgraded, but the problems came back (at least to some extent). So my guess is that we need to stay on the old v1.0.5.

  @SimonGA thanks for letting me know - decided to send mine back as it's a deal breaker and no idea when / if it might be fixed.

A shame really as it seems like a good bit of hardware, just a little too locked down with the firewall though - would be nice to see some advanced options made visible so it could be turned off which might mitigate this kind of hidden issue.

  @dandyfop Yes I understand - although mine works perfectly with the firmware provided. It's a good system but it's frustrating that Tp-Link treat this issue as something they don't need to fix in the mainstream firmware releases. It tempts me to speculate that it's a fault with the design which is why Tp-Link don't want to release details of the problem. Or maybe the "fix" is disabling some basic security functionality and my network is open?? Hopefully not, but the secrecy is at least suspicious.

Without knowing what the issue is, I'm not sure how much any more advanced option would help. But I understand you giving up with Deco's altogether. Some of the mesh systems are even more locked down than these so I'll stick with them for the time being.