The Broadcast is not blocked anywhere in my network, packets sniffed at main router. If it were blocked somewhere it would not reach the sniffer. Also can see them in tcpdump from a mashine directly...

and here you can see that the deco does not have port 20002 open

@David-TP Sure here you can see the decos shouting for 20002

@David-TP Yeah give some solution. Like a firmware update.

@MakeAWebGUI Did you have any luck with custom firmware installation on deco device?

@TP-Link Give us access to our devices. Disable the Server requirement. It´s just bonkers that you can´t setup the device locally.