Installation Guide of ngrt4nd

ngrt4nd is an utility that can be installed and enabled on a Nagios server to provide the service of retrieving status data to RealOpInsight Workstation and RealOpInsight Ultimate. As alternative to Livestatus, it depends on the Nagios’s status.dat file and enables a ZeroMQ-based RPC API to get status data.


Use it with caution! Since relying on status.dat, ngrt4nd requires disc I/O, instead of in-memory operations than with Livestatus. Therefore, it’s not a scalable solution and should be used for testing purpose or on small installation only.

Installation of Dependencies

To install and run the software properly, your system needs to satisfy the following dependencies:

  • g++
  • make
  • libstdc++ >= 4.6.x
  • zeromq (libraries and development files, tested with zeromq 2.x)
  • libcrypt (if you are using GNU/Linux systems, that should be already installed)

These software are included in the major GNU/Linux distributions and can be easily installed through the package manager (yum, apt-get, zypper...). The package names vary slightly from a distribution to another, see below the installation process for Fedora, openSUSE and Ubuntu.

Install the dependencies on Fedora

$ sudo yum install gcc-c++ libstdc++ make

Install the dependencies on openSUSE

$ sudo zypper install gcc-c++
libstdc++ make

Install the dependencies on Ubuntu

$ sudo apt-get install libstdc++6 libzmq1


Go to the download page and get a appropriate tarball or binary package.


Once the download completed, go to the suitable installation section according to that you’re using sources or binary packages.

Installation from sources

Once the dependencies installed as mentioned previously, perform the following steps:

$ tar zxf
ngrt4n-d4n-X.Y.Z.tar.gz      # replace X.Y.Z by the suitable
$ cd ngrt4n-d4n-X.Y.Z
$./install-sh     # requires root privileges

This installs the program in /usr/local/sbin by default. An alternative location can be set using the -d switch, type install-sh -h for more details.


If you’re using zeromq 2.x and c++11, a compiling issue ( error: ‘swap’ is not a member of ‘std’) has been reported [1]. The solution is to patch zmq.hpp by adding #include <algorithm> in the header.

Installation from binary packages

Here we assumed that you already installed all the dependencies and also that you already downloaded a suitable binary package of the Daemon Service.

Installation on Fedora and on openSUSE

$ sudo rpm -i /path/to/ngrt4n-d4n.rpm

Replace /path/to/ngrt4n-d4n.rpm with the path to the binary package (e.g. ngrt4n-d4n-1.1.0-opensuse12_2.x86_64.rpm).

Installation on Ubuntu

$ sudo dpkg -i /path/to/ngrt4n-d4n.deb

Replace /path/to/realopinsight.deb with the path to the binary package (e.g. ngrt4n-d4n-1.1.0-i386.deb).

Check the Installation

Daemon Service is comprised of one command line program named ngrt4nd. As standard UNIX commands, it has a help page (ngrt4nd -h) as well as a man page.

Set the Authentication Token

Perform the following command as root. You’ll be prompted to enter a passphrase.

$ ngrt4nd -P

Start the Service

Once the authentication token is set, you can start the service by performing the following command.

$ ngrt4nd    # requires root privileges

This runs the program in daemon mode assuming that the path to the Nagios Status File is /usr/local/var/lib/status.dat and that the listening port is 1983. These default parameters can be overridden using appropriate options. See the help ( ngrt4nd -h) or the man page for more details.

Important Note: If you have a firewall between the monitoring server and the operator workstation, you may need to update your filtering rules for enabling traffic on the listing port (1983, if you haven’t changed the default port).