@FridoxFL Hi, welcome to the community. Please make sure "Ignore Ping from WAN" is disabled. By the way, what is the local device that you plan to open 80, 443, 4001, 90 for? Wait for your reply....

@pwzapp Hi, welcome to the community. The latest firmware for Deco M9 Plus is 1.9.1 now. It is recommended to update to the latest firmware first: https://www.tp-link.com/en/support/faq/1599/--method...

@racergr Hi, welcome to the community. I'd like to follow up on your case via email and ask the senior engineer for further assistance. Please check whether you've received my email. Best regards.

@JakeyBalakey Hi, thank you very much for the feedback. Have you tried to swap the location of the two satellite Deco X50s to see whether the slow speed always followed the same Deco unit? And a new...

@DukeCaboom Hi, can I have the current firmware version on the Deco M4? How about the model number of the two network switches? Is there another ISP router installed in front of the Deco M4? -If yes,...

@Nilzatron Hi, welcome to the community. Did you just purchase the Deco P9? Have you tried to swap the power adapters of these units? By the way, after factory resetting the Deco P9, will it turn to...