Ntopng seems useful. They're really trying to push licenses for "enterprise" features, but the "community edition" is available under the GPLv3 license and allows you to track throughput to remote hosts. Not sure how much of a performance impact it makes.
Ntopng seems useful. They're really trying to push licenses for "enterprise" features, but the "community edition" is available under the GPLv3 license and allows you to track throughput to remote hosts. Not sure how much of a performance impact it makes.