ntop is a great tool for recording network throughput statistics for FreeBSD based firewalls. The statistics can be displayed as graphs using a web browser. Ntop, however, has the limitation that it does not allow you to filter the throughput per host; you can only filter per interface or per some hardcoded protocol and port numbers.
Is there a similar tool which is more flexible? In particular, I am looking for the possibility to filter by host.
I already have examined and excluded the following tools: Cacti, IPAudit, IPTraf, MRTG, Zabbix. Reason for exclusion: missing functionality or no longer maintained.