if.conf(5) on Linux
The text 6269b9bff5a3, as Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
interface, firewalling, and QoS configuration file. /etc/netscript/if.conf - interface setup shell script file /etc/netscript/qos.conf - QoS setup shell script file /etc/netscript/ipfilter.conf - IP chains filtering shell script file /etc/netscript/srvfilter.conf - server IP filter shell script file