52 lines
1003 B
Groff
52 lines
1003 B
Groff
.\"
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.\" $FreeBSD$
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.\"
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.Dd June 22, 1997
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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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.Em ipfw
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is a system facility which allows filtering,
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redirecting, and other operations on IP packets travelling through
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system interfaces.
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.Pp
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The user interface for
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.Em ipfw
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is implemented by the
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.Nm ipfw
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program, so the reader is referred to the
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.Xr ipfw 8
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manpage for a complete description of the capabilities of
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.Em ipfw
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and how to use it.
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.Pp
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.Sh KERNEL OPTIONS
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The following options in the kernel configuration file are related to
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.Em ipfw
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operation:
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Options in the kernel configuration file:
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.Bl -tag -width "options IPFIREWALL_VERBOSE_LIMIT"
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.It Cd options IPFIREWALL
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enable
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.Nm
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.It Cd options IPFIREWALL_VERBOSE
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enable firewall logging
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.It Cd options IPFIREWALL_VERBOSE_LIMIT
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limit firewall logging
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.It Cd options IPDIVERT
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enable
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.Xr divert 4
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sockets
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.El
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.Pp
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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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