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.\" $OpenBSD: sasyncd.8,v 1.1 2005/03/30 18:44:49 ho Exp $
.\"
.\" Copyright (c) 2005 Håkan Olsson. 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.
.\"
.\" 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.
.\"
.\" This code was written under funding by Multicom Security AB.
.\"
.\" Manual page for sasyncd
.\"
.Dd August 07, 2004
.Dt SASYNCD 8
.Os
.Sh NAME
.Nm sasyncd
.Nd IPSec SA synchronization daemon for failover gateways
.Sh SYNOPSIS
.Nm
.Op Fl dv
.Op Fl c Ar config-file
.Sh DESCRIPTION
The
.Nm
daemon synchronizes IPSec SA information between a number of failover
IPsec gateways.
The most typical scenario is to run
.Nm
on hosts also running
.Xr isakmpd 8
and sharing a common IP-address using
.Xr carp 4 .
.Pp
The daemon runs either in master or slave mode, in which the master
tracks all local IPsec SA changes and sends this information along to
all slaves so they will have the same data.
.Ss Failover
.Nm
does not itself do any failover processing; the normal mode of
operation is to track state changes on a specified
.Xr carp 4
interface.
Whenever it changes,
.Nm
will follow suit.
It is possible to
.Qq lock
the daemon to a particular state; see
.Xr sasyncd.conf 5 .
.Ss Host to host communication
All
.Nm
host to host communication is protected by
.Xr ssl 8 ,
so the daemon requires certificates configured for each host.
Normally
.Pa /etc/ssl/sasyncd.crt
and
.Pa /etc/ssl/private/sasyncd.key
are used, although alternate locations may be specified in the
configuration file.
.Pp
The options are as follows:
.Bl -tag -width Ds
.It Fl c Ar config-file
If given, the
.Fl c
option specifies an alternate configuration file instead of
.Pa /etc/sasyncd.conf .
.It Fl d
The
.Fl d
option causes the daemon to run in the foreground, logging to stderr.
.It Fl v
The
.Fl v
option increases the verbosity level of the daemon.
This option can be specified several times.
.El
.Sh FILES
.Bl -tag -width /etc/ssl/private/sasyncd.key -compact
.It Pa /etc/sasyncd.conf
The default
.Nm
configuration file.
.It Pa /etc/ssl/sascynd.crt
The default certificate.
.It Pa /etc/ssl/private/sasyncd.key
The default private key.
.It Pa /etc/ssl/ca.crt
The default CA certificate.
.El
.Sh SEE ALSO
.Xr openssl 1 ,
.Xr carp 4 ,
.Xr ipsec 4 ,
.Xr sasyncd.conf 5 ,
.Xr isakmpd 8 ,
.Xr ssl 8
.Sh HISTORY
The
.Nm
daemon first appeared in
.Ox 3.7 .
It was written in 2004 by Hakan Olsson, in part sponsored by
Multicom Security AB, Sweden.
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