LinuxQuestions.org - Setting up a gateway server with bandwidth monitoring?

Howdy,

I'm setting up a ubuntu machine as an internet gateway,

I've set one up previous using iptables & firestarter which was fairly straight forward,

A couple of things I would like to do

- Monitor monthly bandwidth usage based on lan ip
- Restrict bandwidth on certain ips? maybe even restrict bandwidth during certain times?

I don't nessessarily need a step by step guide, just a point in the right direction and I should be able to figure out the rest

(I've looked into solutions which turn the machine into a dedicated gateway however that doesn't really work for me)

(Also the reason why this isn't in the ubuntu thread is because I'm considering doing this in either debian or freebsd)

Cheers! :D