This monitor works under linux (kernel 2.4.0 upwards) with the freeswan implementation
of ipsec. See http://www.freeswan.org for more information about it.

The monitor checks if an ipsec tunnel to remote network is established. It does so via
the "ipsec look" command. Simply create a hostgroup ipsec in your mon.cf and feed it
with networks, for example:

hostgroup ipsec		192.168.36.0/24 192.168.126.32/27

This will check if there's a tunnel to the networks 192.168.36.0/24 and 192.168.126.32/27

Notice: ipsec must be in $PATH otherwise nothing will work.

# Copyright (C) 2001 Wiktor Wodecki
#
#    This program is free software; you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation; either version 2 of the License, or
#    (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with this program; if not, write to the Free Software
#    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# $Id: ipsec.monitor,v 1.0.0.1 2001/07/10 10:11:21 wodecki Exp $
#