1#! /bin/sh 2 3# 4# Unfortunately, macOS's devfs is based on the old FreeBSD 5# one, not the current one, so there's no way to configure it 6# to create BPF devices with particular owners or groups. 7# This startup item will make it owned by the admin group, 8# with permissions rw-rw----, so that anybody in the admin 9# group can use programs that capture or send raw packets. 10# 11# Change this as appropriate for your site, e.g. to make 12# it owned by a particular user without changing the permissions, 13# so only that user and the super-user can capture or send raw 14# packets, or give it the permissions rw-r-----, so that 15# only the super-user can send raw packets but anybody in the 16# admin group can capture packets. 17# 18chgrp admin /dev/bpf* 19chmod g+rw /dev/bpf* 20