.\"	$NetBSD: fast_ipsec.4,v 1.14 2013/06/05 23:08:10 christos Exp $
.\"	$FreeBSD: fast_ipsec.4,v 1.2 2003/03/03 11:51:30 ru Exp $
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.\" Copyright (c) 2004
.\"	Jonathan Stone <jonathan@dsg.stanford.edu>. All rights reserved.
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.\" Copyright (c) 2003
.\"	Sam Leffler <sam@errno.com>. All rights reserved.
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.Dd June 5, 2013
.Dt FAST_IPSEC 4
.Os
.Sh NAME
.Nm fast_ipsec
.Nd Fast IPsec hardware-accelerated IP Security Protocols
.Sh SYNOPSIS
.Cd "options IPSEC"
.Cd "options IPSEC_DEBUG"
.Sh DESCRIPTION
.Tn IPsec
is a set of protocols,
.Tn ESP
(for Encapsulating Security Payload)
.Tn AH
(for Authentication Header),
and
.Tn IPComp
(for IP Payload Compression Protocol)
that provide security services for IP datagrams.
Fast IPsec
is an implementation of these protocols that uses the
.Xr opencrypto 9
subsystem to carry out cryptographic operations.
This means, in particular, that cryptographic hardware devices are
employed whenever possible to optimize the performance of these protocols.
.Pp
In general, the
Fast IPsec
implementation is intended to be compatible with the
.Tn KAME IPsec
implementation.
The user should refer to
.Xr ipsec 4
for basic information on setting up and using these protocols.
.Pp
System configuration requires the
.Xr opencrypto 9
subsystem.
When the
Fast IPsec
protocols are configured for use, all protocols are included in the system.
To selectively enable/disable protocols, use
.Xr sysctl 8 .
.Sh DIAGNOSTICS
To be added.
.Sh SEE ALSO
.Xr setkey 8 ,
.Xr sysctl 8 ,
.Xr opencrypto 9
.Sh HISTORY
The protocols draw heavily on the
.Ox
implementation of the
.Tn IPsec
protocols.
The policy management code is derived from the
.Tn KAME
implementation found in their
.Tn IPsec
protocols.
The
Fast IPsec
protocols are based on code which appeared in
.Fx 4.7 .
The
.Nx
version is a close copy of the
.Fx
original, and first appeared in
.Nx 2.0 .
.Pp
Support for IPv6 and
.Tn IPcomp
protocols has been added in
.Nx 4.0 .
.Pp
Support Network Address Translator Traversal as
described in RFCs 3947 and 3948 has been added in
.Nx 5.0 .
.Sh BUGS
Certain legacy authentication algorithms are not supported because of
issues with the
.Xr opencrypto 9
subsystem.
.Pp
This documentation is incomplete.