ipfilter.conf(5) on Linux
The text a205a074140c, as Debian 7 (Wheezy), Debian 6.0 (Squeeze) 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