MAC_IFOFF(4) | Device Drivers Manual | MAC_IFOFF(4) |
NAME¶
mac_ifoff
—
interface silencing policy
SYNOPSIS¶
To compile the interface silencing policy into your kernel, place the following lines in your kernel configuration file:options MAC
options MAC_IFOFF
options MAC
mac_ifoff_load="YES"
DESCRIPTION¶
Themac_ifoff
interface silencing module
allows administrators to enable and disable incoming and outgoing data flow on
system network interfaces via the sysctl(8)
interface.
To disable network traffic over the loopback
(lo(4)) interface, set the
sysctl(8) OID
security.mac.ifoff.lo_enabled to 0 (default
1).
To enable network traffic over other interfaces, set the
sysctl(8) OID
security.mac.ifoff.other_enabled to 1
(default 0).
To allow BPF traffic to be received, even while other traffic is disabled, set
the sysctl(8) OID
security.mac.ifoff.bpfrecv_enabled to 1
(default 0).
Label Format¶
No labels are defined.SEE ALSO¶
mac(4), mac_bsdextended(4), mac_lomac(4), mac_mls(4), mac_none(4), mac_partition(4), mac_portacl(4), mac_seeotheruids(4), mac_test(4), mac(9)HISTORY¶
Themac_ifoff
policy module first appeared in
FreeBSD 5.0 and was developed by the TrustedBSD
Project.
AUTHORS¶
This software was contributed to the FreeBSD Project by Network Associates Labs, the Security Research Division of Network Associates Inc. under DARPA/SPAWAR contract N66001-01-C-8035 (“CBOSS”), as part of the DARPA CHATS research program.BUGS¶
See mac(9) concerning appropriateness for production use. The TrustedBSD MAC Framework is considered experimental in FreeBSD. While the MAC Framework design is intended to support the containment of the root user, not all attack channels are currently protected by entry point checks. As such, MAC Framework policies should not be relied on, in isolation, to protect against a malicious privileged user.December 10, 2002 | Debian |