Bash script to reset the bridge which creates a conflict upon connecting a second time to the wifi provided on trains with Deutsche Bahn.
Give the script execution rights ( {chmod +x}) and execute it via {sudo ./fix_db_wifi.sh}. The script needs root as ifconfig and brctl need root rights.
After you have executed the script, reconnect to the wifi (WIFI@DB) and you should be prompted to the hotspot login.