The ISP module of “WFilter NG firewall” designed for ISPs to manage users and bandwidth plans.
Beside “user web portal”, a recent update of “WFilter NG Firewall” added “Email Notification” feature. So users can get email notification of their bandwidth usage.
As shown in the above diagram, you can set different email alert frequency for “valid users” and “cap exceeded users”, with different email contents.
This feature will be helpful for ISPs who prefer use email alert rather web portal.