have a look to this tool : http://www.cacti.net/
hebert Maia a icrit :
Hello misc! I am owning a openbsd box by a german ISP who did not support any kind of traffic overview. On Linux i used "IPTraf", which seems horrible to port :/ My question is: How do you people make your own traffic statistics (over months/years) on a single openbsd box? Thanks alot