This plugin upates the redis cache when a FQDN is added or updated in Matomo
Refer to this Matomo FAQ.
Add the following section to your config.ini.php:
[UpdateExposedFqdnList]
redis_host = '127.20.0.0'
redis_port = 6379
redis_db_index = 0
Make sure you have direct access to the config.ini.php file before using this plugin