For ISP network management, you will need:

1. User authentication.
2. Monitor and filter of internet activities.
3. Bandwidth shaper.
4. Accounting and statistics.

Usually, you will need several systems to achieve this goal. Today, WFilter NG Firewall, a linux based next generation firewall provides a total solution for ISP network management, with below features:

1. Two types of authentication: “Web Auth” and “PPPoE Auth”.
2. An “Internet Usage” module to record web surfing, downloading activities.
3. Rich internet access control policies: web filter, application control, ip-mac binding …
4. Bandwidth policies of realtime rate limit and monthly bandwidth cap limit.
5. Bandwidth optimize solutions.
6. Internet usage and bandwidth statistics.
7. A web push feature to push statistics, web page and advertise.

All these features can be configured in the “WFilter ISP module“.

Some screenshots:

Policies

User settings

User Portal

More details can be found at here: WFilter NG Firewall ISP Module