README for Debian's pmacct ========================== Accounting on Multiple Interfaces --------------------------------- Debian's pmacct initscript supports multiple interfaces. Specify each interface you want to listen on, in the shell variable INTERFACES in /etc/default/pmacct . Create a configuration file for each interface in /etc/pmacct like so: /etc/pmacct/pmacct.eth1.conf for listening on eth1 /etc/pmacct/pmacct.eth2.conf for listening on eth2 and so on. Make sure each configuration file specifies the correct interface.