user53747's questions

I have a sub-net of machines which are run autonomously by users. I control the server which acts as gateway between the sub-net and the internet. My server is running Ubuntu.

I'm looking for a way to:

• Record the amount (only need size, don't care about what or from where) of incoming and outgoing network traffic per sub-net IP.
• Subsequently query the amount of network traffic that occurred on a particular IP address during a particular time-frame.
• Bonus: Allow me to cap or shape traffic for a specific IP address once a certain (configurable) volume has been reached.

Basically, something that let's me account and charge users for their network traffic.

I have a Ubuntu system with 2 NICs where I want to create a bridge br0 and bind both NICs to that bridge using the bridge_ports eth0 eth1 option.

I also want to configure the bridge to get an IP address from the local DHCP server.

I think I know how to do this, but I wonder which MAC address(es) will the bridge send out when requesting IP settings from the DHCP server? The MAC address of eht0, eth1, both?

Thanks, Carsten