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.Dd August 22, 2010 .Dt NPFCTL 8 .Os .Sh NAME .Nm npfctl .Nd control NPF packet filter .Sh SYNOPSIS .Nm npfctl .Ar command .Op Ar arguments -----
.Sh DESCRIPTION The .Nm command can be used to control the NPF packet filter. For a description of NPF's configuration file, see .Xr npf.conf 5 .
p The first argument, .Ar command , specifies the action to take. Valid commands are: l -tag -width reload t start Enable packet inspection using the currently loaded configuration, if any. Note that this command does not load or reload the configuration. t stop Disable packet inspection. This command does not change the currently loaded configuration. t reload Op Ar path Load or reload configuration from file. The configuration file at
a /etc/npf.conf
will be used unless a file is specified by
.Ar path .
The reload operation (i.e., replacing the ruleset) is atomic.
t flush Flush configuration.
That is, remove all rules and tables.
This command does not disable packet inspection.
t table Ar tid List all entries in the currently loaded table specified by
.Ar tid .
Fail if
.Ar tid
does not exist.
t table Ar tid Aq Ar addr/mask Query the table
.Ar tid
for a specific IPv4 CIDR, specified by
.Ar addr/mask .
If no mask is specified, a single host is assumed.
t table Ar tid Ar [ add | rem ] Aq Ar addr/mask In table
.Ar tid ,
add or remove the IPv4 CIDR specified by
.Aq Ar addr/mask .
.El
-----
.Sh PERFORMANCE
Reloading the configuration is a relatively expensive operation.
Therefore, frequent reloads should be avoided.
Use of tables should be considered as an alternative design.
See
.Xr npf.conf 5
for details.
-----
.Sh FILES
l -tag -width /etc/npf.conf -compact t Pa /dev/npf control device
t Pa /etc/npf.conf default configuration file
.El
-----
.Sh EXAMPLES
Starting the NPF packet filter:
d -literal -offset indent # npfctl reload
# npfctl start
.Ed
p
Addition and removal of entries in the table whose ID is 2:
d -literal -offset indent # npfctl table 2 add 10.0.0.1
# npfctl table 2 rem 182.168.0.0/24
.Ed
-----
.Sh SEE ALSO
.Xr npf.conf 5 ,
.Xr npf_ncode 9
.Sh HISTORY
NPF first appeared in
.Nx 6.0 .