If you host your own Noodle server please use a firewall.
The Noodle white list is a list of IP ranges that are allowed to connect to your noodle.
IP ranges are in the form of an ipv4 and a netmask.
If your settings are invalid Noodle will let everyone see the login page.
If you do something silly like 0.0.0.0/32 contact us and we can help you reset it with
update system_settings set value = '0.0.0.0/0', binary_data = null where key_name = 'WHITE_LIST'; service noodle restart
Only an internal network Example:
Only 2 IPs Example:
Everyone can see the login page Example: