pfconfig(8)pfconfig(8)NAMEpfconfig - Configure packet filter parameters
SYNOPSIS
/usr/sbin/pfconfig [+/-p[romisc]] [+/-c[opyall]] [-b[acklog] nnn]
[-a[ll]] [interface-name...]
DESCRIPTION
The pfconfig command allows the system manager to configure certain
parameters of the packet filter driver (see packetfilter(7)). These
parameters are configured separately for each interface; the interfaces
are specified by name on the command line (for example, ln0, and ni1).
If more than one interface is specified, they are all given the same
settings. Alternatively, you can specify -all to configure all the
packet-filter interfaces on the system.
You can set the following parameters with pfconfig: Allows packet fil‐
ter users to set the interface into promiscuous mode (receives all
packets). Whenever there is at least one packet filter descriptor open
with the ENPROMISC mode bit set, the interface is put into promiscuous
mode. When no such descriptors are in use, the interface is returned
to normal mode. The interface is no longer put into promiscuous mode
on behalf of packet filter users; if the interface is in promiscuous
mode when this command is given, it is returned to normal mode. (The
superuser may use ifconfig(8) to control promiscuous mode, overriding
the mode set by non-superusers. This is the default setting.) Allows
packet filter users to set the interface into copy-all mode (receives
packets sent/received by the kernel-resident protocol software [for
example, IP, ARP, DECnet, LAT] on this host). Whenever there is at
least one packet filter descriptor open with the ENCOPYALL mode bit
set, the interface is put into copy-all mode. When no such descriptors
are in use, the interface is returned to normal mode. The interface is
no longer put into copy-all mode on behalf of packet filter users; if
the interface is in copy-all mode when this command is given, it is
returned to normal mode. (The superuser may use ifconfig(8) to control
copy-all mode, overriding the mode set by non-superusers. This is the
default setting.) Sets the maximum backlog (packet filter input queue
length) for non-superuser descriptors to the specified number. When a
descriptor is opened, it is given a queue length limit of two. An
application can increase this backlog using the EIOCSETW ioctl request.
Superusers are allowed to increase their backlog up to a system-wide
maximum; non-superusers are allowed to increase their backlog only up
to the maximum set by this program. Note that allowing too large a
backlog may result in vast amounts of kernel memory being tied up in
the packet filter driver queues.
If no configuration parameters are specified, the pfconfig com‐
mand displays the current packet filter configuration for the
network interfaces.
Only the superuser may use this command to change the configura‐
tion.
DIAGNOSTICS
PACKETFILTER option is not built into the running kernel
Explanation:
Packetfilter support is not built into the kernel. Reconfigure
the kernel with the packetfilter option. pfopen: xxx: No such
device
Explanation:
The specified network device does not exist on the system, or no
pfilt minor devices exist in the /dev/pf directory. pfconfig:
your system may not be properly configured; see "man packetfil‐
ter"
Explanation:
No pfilt minor devices exist in the /dev/pf directory. pfcon‐
fig: either network interface 'xxx' is down, or your system may
not be properly configured; see "man packfilter"
Explanation:
The specified network device is not up and running. pfconfig:
either all of your network interfaces are down, or your system
may not be properly configured; see "man packfilter"
Explanation:
No network devices are up and running.
SEE ALSO
Commands: intro(1), netstat(1), pfstat(1), ifconfig(8)
Files: inet.local(4), bpf(7), packetfilter(7)pfconfig(8)