I have Debian 4.0 installed running as a gateway. Command line only. How can I log the ethernet ports for bandwidth usage? Logging virtual ports would be nice too.
Here's the situation. I set up OpenVPN to allow remote users to connect but I think the internet connection is not sufficient for what is needed. I want to periodically sample the networks interfaces for a total bandwidth usage. For example every minute I want to sample both eth0 and tun0. What tools are out there that simply log the total bandwidth usage on a port?
