@Kittentakara Hello, how many address reservation entries you have added already? Theoretically, the Archer MR400 V3 supports up to 32 entries; Besides, please ensure that the firmware is up to date....

Hi Kalima, thanks for your valued reply. Glad to hear that you figured it out. Thanks for your sharing again. If need more help in the future, be free to let us know. Good day.

@mhaas11 Hello, may I know how do you know that this protection does not work? Could you please provide more details? Thanks a lot.

@jpuk Hello, thanks for your update. Glad to hear that you figured it out. If need more help in the future, be free to let us know. Good day.

@asifpiash48 Thanks for your valued reply. From your description, there is only TP-Link router existed, theoretically, you need open the port for your devices on the TP-Link router only. Please check...

@wccccw Hello, please try to change another ethernet cable, like cat5e or above. And then you can reboot the router to test its performance. Any updates, be free to let us know. Good day.