Starting from yesterday's evening the internet connection is super slow. Speedtest shows around 7Mbps download speed, but most of the time it just fails to connect at all. I restarted the modem a few times, but that didn't help.
In the logs of my Fritz box I can see: "No automatic configuration or updates by the service provider possible for this device: Server responds with HTTP status code 503", not sure if this is related.
