@nickwalsh001 Hello, you can add an unmanaged switch behind the Deco M9 plus to provide more ethernet connection for wired devices. May it help.

@RedRoger What is the current network diagram? Like main router -- Deco A -- Deco B )))((( Deco C? Please show us a screenshot of the signal source page of the wifi repeater Deco, and the same page...

@Benkhof Thanks for your reply. We have emailed you some instructions and information what we need to narrow it down and try to fix it. Please check your inbox and take your time to reply to us. Good...

@kels83 Yep, you can add the new Deco units to the existing mesh network and then connect it to the switch by wired cable. Good day.

@pMR600 Okay. good to know.

@Hadde Thanks for your reply; Glad to hear that you figured it out. It is normal that you can access the web UI with the global IP and dynamic DNS locally, it is called NAT loopback which is...