@KruLex Okay, I understand that you are experiencing issues with your guest network on Deco Mesh, specifically that guest devices cannot access your custom DNS server (e.g., Pi-Hole) on the main...

@Mackan So I don't see the reports because I don't work for tp-link @David-TP should be able to find them once he is back.

@Grounded Ok lets try it another way. See the following post and use option #2

@Alexi_ Thank you for providing detailed information about your requirements. After reviewing your needs—expanding your existing network with a main Deco unit compatible with PX50, supporting 1Gbps...

@Grounded Have you tried hooking the main unit up via Ethernet cable to see if it will download then?

@BPCS You can try it and see what happens but if you do the cold reboot and it fixes it but then the problem keeps happening let us know.