ASC is a tool to count traffic between users and different subnets. The most common usage is to measure individual users amount of traffic to and from the internet. Very easy to configure, see the documentation.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.
