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	.\"			.\"
	.\" $FreeBSD$			.\" $FreeBSD$
	.\"			.\"
	.Dd May 21, 2020			.Dd August 19, 2020
	.Dt IPFW 4			.Dt IPFW 4
	.Os			.Os
	.Sh NAME			.Sh NAME
	.Nm ipfw			.Nm ipfw
	.Nd IP packet filter and traffic accounting			.Nd IP packet filter and traffic accounting
	.Sh SYNOPSIS			.Sh SYNOPSIS
	To compile			To compile
	the driver			the driver
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	.Tn NAT			.Tn NAT
	facility of			facility of
	.Nm ,			.Nm ,
	the kernel option			the kernel option
	.Dv LIBALIAS			.Dv LIBALIAS
	enables full			enables full
	.Xr libalias 3			.Xr libalias 3
	functionality in the kernel.			functionality in the kernel.
	Full functionality refers to included support for cuseeme, ftp, bbt,			Full functionality refers to included support for ftp, bbt,
	skinny, irc, pptp and smedia packets, which are missing in the basic			skinny, irc, pptp and smedia packets, which are missing in the basic
	.Xr libalias 3			.Xr libalias 3
	functionality accomplished with the			functionality accomplished with the
	.Dv IPFIREWALL_NAT			.Dv IPFIREWALL_NAT
	kernel option.			kernel option.
	.Pp			.Pp
	The user interface for			The user interface for
	.Nm			.Nm
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