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60 lines
945 B
Groff
60 lines
945 B
Groff
.\"
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.\" $FreeBSD$
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.\"
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.Dd October 28, 2002
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.Dt IPFW 4
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.Os
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.Sh NAME
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.Nm ipfw
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.Nd IP packet filter and traffic accounting
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.Sh DESCRIPTION
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The
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.Nm
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system facility allows filtering,
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redirecting, and other operations on
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.Tn IP
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packets travelling through
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network interfaces.
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.Pp
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The user interface for
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.Nm
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is implemented by the
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.Xr ipfw 8
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utility, so please refer to the
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.Xr ipfw 8
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manpage for a complete description of the
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.Nm
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capabilities and how to use it.
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.Ss Kernel Options
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The following options in the kernel configuration file are related to
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.Nm
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operation:
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.Pp
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.Bl -tag -width ".Dv IPFIREWALL_VERBOSE_LIMIT" -compact
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.It Dv IPFIREWALL
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enable
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.Nm
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.It Dv IPFIREWALL_VERBOSE
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enable
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.Nm
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logging
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.It Dv IPFIREWALL_VERBOSE_LIMIT
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limit
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.Nm
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logging
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.It Dv IPDIVERT
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enable
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.Xr divert 4
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sockets
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.It Dv PFIL_HOOKS
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add packet filter hooks
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.El
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.Sh SEE ALSO
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.Xr setsockopt 2 ,
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.Xr divert 4 ,
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.Xr ip 4 ,
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.Xr ipfw 8 ,
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.Xr sysctl 8 ,
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.Xr syslogd 8 ,
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.Xr pfil 9
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