I have a pretty standard network at home with a wifi router and some devices connected via LAN and some connected via Wifi. The router is an Asus RT AC68U. For some days now I can not use my Wifi anymore. The wired devices still work. If I connect to the router via Wifi it connects and gets an IP from the DCHP server (which is a different one than the router) and after that there is no way to connect with any device in the network not even using the IP. After that I can't even reach the gateway. Still the router recognizes the wifi connected device as connected.
I confirmed this with all my devices that got Wifi (My new Android phone, my old bada phone, my Win10 tablet and my Win10 notebook).
Now to what happend: There are two main events in the last couple days that could maybe have triggered it. First the router has changed it's place (the difference is about half a meter and the router even gained distance to any metal) and I installed the new firmware (stock from Asus). Since I thought maybe there is a bug in the firmware I tried going back to the previous firmware but that did not change a thing.
I'm clueless how it can happen that it can connect to the dchp and after that is shut out from the network.