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+.\"	$Id: ipsec.conf.5,v 1.1 2005/04/04 22:19:50 hshoexer Exp $
+.\"
+.\" Copyright (c) 2004 Mathieu Sauve-Frankel  All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. The name of the author may not be used to endorse or promote products
+.\"    derived from this software without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+.\"
+.Dd July 7, 2004
+.Dt IPSEC.CONF 5
+.Os
+.Sh NAME
+.Nm ipsec.conf
+.Nd IPsec configuration file
+.Sh DESCRIPTION
+.Nm
+.Xr ipsec 4
+.Sh EXAMPLES
+.Bd -literal
+.Ed
+.Sh GRAMMAR
+.Nm
+in BNF:
+.Bd -literal
+line		= ( flow-rule | group-rule )
+
+flow-rule	= "flow" [( ah-rule | esp-rule | ipip-rule | ipcomp-rule )]
+
+group-rule	= "group" "{" flow-rule, flow-rule, ... "}"
+
+ah-rule		= "ah" [ "transport" ] [ ( "in" | "out" ) ] [ "log" ] 
+		  [ "on" ifspec ] hosts [ peers ] [ spi ] [ xform ] [ key ] 
+		  [ tag ]
+
+ipip-rule	= "ipip" [ ( "in" | "out" ) ] [ "log" ]
+		  [ "on" ifspec ] hosts [ peers ] [ spi ] [ tag ]
+
+esp-rule	= "esp" [ "transport" ] [ ( "in" | "out" ) ]  [ "log" ] 
+		  [ "on" ifspec ] hosts [ peers ] [ spi ] [ xform ] [ key ] 
+		  [ tag ]
+
+ipcomp-rule	= "ipcomp" [ ( "in" | "out" ) ]  [ "log" ] [ "on" ifspec ] 
+		   hosts [ peers ] [ cpi ]
+
+hosts		= "from" [
+		   [ port ] "to" ( "any" | "self" | host ) [ port ]
+
+cpi		= "cpi" cpispec
+
+cpispec		= ( number | number:number )
+
+spi		= "spi" spispec
+
+spispec		= ( number | number:number )
+
+peers		= "peer" 
+
+xform		= "xform" xformspec
+
+xformspec 	= ( tranform | transform:transform )
+
+transform	= ( enc | enc-auth | auth )
+
+auth 		= ( "md5" | "rmd160" | "sha1" | "sha2-256" | "sha2-384" |
+		    "sha2-512" )
+ 
+enc 		= ( "aes" | "blowfish" | "cast" | "des" | "3des" | "skipjack" )
+
+key 		= "key" string
+
+ipspec		= "any" | host | "{" host-list "}"
+
+host           = [ "!" ] ( address [ "/" mask-bits ] | "<" string ">" )
+
+address        = ( interface-name | "(" interface-name ")" | hostname |
+                 ipv4-dotted-quad | ipv6-coloned-hex )
+
+.Ed
+.\" The following requests should be uncommented and used where appropriate.
+.\" This next request is for sections 2, 3, and 9 function return values only.
+.\" .Sh RETURN VALUES
+.\" This next request is for sections 1, 6, 7 & 8 only.
+.\" .Sh ENVIRONMENT
+.\" .Sh FILES
+.\" .Sh EXAMPLES
+.\" This next request is for sections 1, 4, 6, and 8 only.
+.\" .Sh DIAGNOSTICS
+.\" The next request is for sections 2, 3, and 9 error and signal handling only.
+.\" .Sh ERRORS
+.\" .Sh SEE ALSO
+.\" .Xr foobar 1
+.\" .Sh STANDARDS
+.Sh HISTORY
+The
+.Nm
+file format first appeared in
+.Ox 3.7
+.\" .Sh CAVEATS
+.\" .Sh BUGS