Hi,
Any idea How to count traffic from one interface.
Ex. I whant to know how much Bytes i have Download with Eth0 and How many bytes uploaded throu eth0.
but to save this counter, and if i reboot router not to start from zero 0 . 
Please any answer, or command how to do this.
I got a similar situation and i use filters for that purpose. If you define two forward rules for the eth0 (or what ever interface you like) both for in and out traffic you will see the counters are increasing in the way you like. You should use the passthrough for the action since it does nothing to do traffic other than increasing the counters.
For the reboot issue, there’s no way to solve it since every counter is being resetted with a reboot (that’s what i know). So i create a script to email the counter statistics in every ten minutes. So it won’t be a problem.
Gokalp