Install Dependencies

/etc/rc.conf_mount_rw
pkg update
pkg install nano
pkg install curl
pkg install bash
/etc/rc.conf_mount_ro

Create two directories

mkdir -p /opt/bin
mkdir -p /opt/etc/xinetd.d

Download Chek_MK Agent and make it executable

curl --output /opt/bin/check_mk_agent 'https://git.mathias-kettner.de/git/?p=check_mk.git;a=blob_plain;f=agents/check_mk_agent.freebsd;hb=HEAD'
chmod +x /opt/bin/check_mk_agent

Create xinetd configutation file

nano /opt/etc/xinetd.d/check_mk
# +------------------------------------------------------------------+
# |             ____ _               _        __  __ _  __           |
# |            / ___| |__   ___  ___| | __   |  \/  | |/ /           |
# |           | |   | '_ \ / _ \/ __| |/ /   | |\/| | ' /            |
# |           | |___| | | |  __/ (__|   (    | |  | | . \            |
# |            \____|_| |_|\___|\___|_|\_\___|_|  |_|_|\_\           |
# |                                                                  |
# | Copyright Mathias Kettner 2014             mk@mathias-kettner.de |
# +------------------------------------------------------------------+
#
# This file is part of Check_MK.
# The official homepage is at http://mathias-kettner.de/check_mk.
#
# check_mk 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 in version 2.  check_mk is  distributed
# in the hope that it will be useful, but WITHOUT ANY WARRANTY;  with-
# out even the implied warranty of  MERCHANTABILITY  or  FITNESS FOR A
# PARTICULAR PURPOSE. See the  GNU General Public License for more de-
# ails.  You should have  received  a copy of the  GNU  General Public
# License along with GNU Make; see the file  COPYING.  If  not,  write
# to the Free Software Foundation, Inc., 51 Franklin St,  Fifth Floor,
# Boston, MA 02110-1301 USA.

service check_mk
{
    type           = UNLISTED
    port           = 6556
    socket_type    = stream
    protocol       = tcp
    wait           = no
    user           = root
    server         = /opt/bin/check_mk_agent

    # If you use fully redundant monitoring and poll the client
    # from more then one monitoring servers in parallel you might
    # want to use the agent cache wrapper:<br />

    #server         = /usr/bin/check_mk_caching_agent

    # configure the IP address(es) of your Nagios server here:
    #only_from      = 127.0.0.1 10.0.20.1 10.0.20.2

    # Don't be too verbose. Don't log every check. This might be
    # commented out for debugging. If this option is commented out
    # the default options will be used for this service.
    log_on_success =

    disable        = no
}

Add this line to to /etc/inc/filter.inc just before line 2380

fwrite($xinetd_fd, "includedir /opt/etc/xinetd.d");
nano /etc/inc/filter.inc
(...)    }
    fwrite($xinetd_fd, "includedir /opt/etc/xinetd.d");
    fclose($xinetd_fd); // Close file handle
(...)

Apply chances

In pfSense GUI go to Status -> Filter Reload

Testing (adjust IP)

telenet 192.168.0.250 6556

 

 

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