Many institutions use this type of authentication in the WIFI as a 'sure' means of preventing unauthorised access.
Carlos Pérez-Aradros Herce Captive hotspot
WIFI hotspot with Zeroshell captive hotspot
Clone the anubis project files
git clone https://github.com/philemonsunday/anubis.git
Navigate to src in the cloned folder
cd ./anubis/src
Run the installer to check dependencies
chmod x ./installer.sh ; ./installer.sh
Run the main python file
cd .. ; python anubis.py