@qazwsxedc16 Thanks for the suggestion. I see indeed that he's getting blocked for DDOS on the router. I'll have to investigate this further

Hi, I have one PC that suddenly lost DNS. After rebooting the router the PC had DNS back for like 2 hours then it was gone again. Telnet 8.8.8.8 53 doesn't work, when switching the Wifi connection on...