8.1. Configuring the Kernel for IP Accounting
The Linux IP accounting feature is very
closely related to the Linux firewall software. The places you want
to collect accounting data are the same places that you would be
interested in performing firewall filtering: into and out of a
network host and in the software that does the routing of packets. If
you haven't read the section on firewalls, now is
probably a good time to do so, as we will be using some of the
concepts described in Chapter 7.