Script who send you an email if your public IP change. Add this script in your crontab !
Example (execute the script all the 6 hours) : 0 */6 * * * cd /path/to/IPTracker && /usr/bin/python3 /path/to/IPTracker/ip_tracker.py >> /path/to/IPTracker/ip_tracker.log
This script work only with Gmail.
Make your config.py file with the config.example.