Software Netflow Probe for LINUX

Hi,

I have read through these forums and cannot find any substantial discussion on solutions for software Netflow probes on machines with a single NIC.

We are running Debian and have been running fprobe for some time. Our servers have one interface each. (one NIC per server, eth0) We have previously only been using CUFlow for reporting.

I have now installed NFA and it seems great. It does everything we need. However, NFA is combing the incoming and outgoing data and counting them both as incoming. (Traffic OUT Details shows "No data available.")

Does anyone know of another software probe we can use that will work correctly with NFA on a server with a single NIC?