@Askph What is the model number of your router? Is it Archer C2300 or Archer A2300? What do you mean by blocking VPN? Please provide more information. Good day.

@Leane What is the model number of your TP-link device? Password makes your devices secured; if your router does not have wifi password, you can create one for it. Good day.

@VCL Thanks for your reply. I do find that you raised feedback email via the Deco app. Back to your case, cause we cannot figure it out, to fix it, our engineer will email you later. If you are...

@Oeti With main Deco connected to the ISP router only, please connect your computer to the Deco when the LED turns red and click here to check the IP and gateway. And please verify whether you can...

@FuntIzuma You are welcome, glad to hear that it works perfectly. Now you can enjoy the internet with the Deco network. If need more help, please feel free to contact us. Good day.

@Gerben You can follow the instruction below to install the old firmware via firmware recovery. https://community.tp-link.com/en/home/stories/detail/582 May it help and have a good day.