No Connection to WiFi on IC/ICE in Germany
Let's say you're a developer in Germany trying to connect to the IC WiFi but are failing miserably. Perhaps you're using Linux and have Docker installed :D. Don't worry, I had the same problem and was able to fix it with these simple steps.
Step 1: Command Line :D
ip address // to view what docker networks hog the subnet
docker network rm $your-docker-network // delete the evil docker network
docker network prune // or just eradicate them all
Step 2: Restart Your Laptop or Whatever
Step 3: Connect to ICEportal.de or login.wifionice.de to Login to the WiFi
Step 4: Be Happy - It Hopefully Works Now!