He guys, I'm new her, frustrated and hope someone can help me out here.

I have bought a WIFI socket, that works with my Amazon Alexa. The socket device,the Smart Life app and my Samsung s7 edge phone works excellent every where except for: Home!!

When I connect it to my Arris TG3452 Router, I do see them in the devices gateway as connected, but I can't pair them with my phone.
I have tried in on 3 different locations, and guess what worked fine. So its not my phone, nor the app nor the smart socket device. Even tested with
another phone that works well on other locations, but not at home. It must be a setting in my router I guess, but I can't find it.
Anybody has a same issue and have solution? If any further info is necessary just let me know.

Hope some one has the golden answer, I would like to turn my lights on/off from my phone and alexis!!

Greetings from a warm and hot Aruba.