Nagwin - Nagios Core for Windows

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Nagwin is a Nagios® Core implementation for Windows systems. It is a packaging of Nagios Core and many other related tools to make it a complete and ready-to-use solution for system monitoring. You can use Nagwin to monitor your IT-infrastructure Nagios-way from Windows.  

Nagios ® Core  is a powerful monitoring system that enables organizations to identify and resolve IT infrastructure problems before they affect critical business processes. Nagios® Core monitors your entire IT infrastructure to ensure systems, applications, services, and business processes are functioning properly. In the event of a failure, Nagios® Core can alert technical staff of the problem, allowing them to begin remediation processes before outages affect business processes, end-users, or customers. Cygwin is a Linux-like environment for Windows. It consists of a DLL (cygwin1.dll), which emulates substantial Linux API functionality, and a collection of tools. Following tools are also a part of Nagwin: Lighttpd, Php, Net-SNMPand Blat.



Itefix provides a virtual test lab in where you can try our products with full functionality.

  • At the moment we have 8 hosts (Windows 11, 10, 7 and Windows servers 2022, 2019, 2016, 2012R2, 2008 R2).
  • Our lab has no Internet access.
  • Itefix software is available via a network share at the desktop. You need to install the software of your choice yourself. 
  • You have also access to some popular 3rd party software to test client scenarios.
  • You can also request multiple test machines to test network scenarios (one per OS type).
Access instructions will be sent to this address.

 Supported platforms : Vista/2008(R2)/7/8/2012(R2)/10/2016/2019/11/2022


Nagwin comes as a ZIP file containing an installer. Simply unzip your downloaded copy and run the package :


  1. Accept License agreement.
  2. (Product edition only) Enter your license key
  3. Specify an installation location.
  4. Installation starts to copy files and set up services.
  5. Enter a password for the nagiosadmin user.


At the end of the installation, it will be possible to start the services and the web interface.

Nagwin installation creates following directory structure: 


Path Comments
All programs - nagios, nagiosstats, nagios cgis, nginx, php-cgi, fastcgi-wrapper, a set of basic tools and Cygwin DLLs
/etc/nagios Nagios configuration files (cgi.cfg, nagios.cfg ....)
All files in this directory are read automatically by Nagios (defined in nagios.cfg)
/etc/php php.ini
/plugins Nagios plugins
/var/html Nagios web directory
/var/log Daemon logfiles for stdout/stderr
/var/opt/nagios Nagios working directory, log files, performance files ...
/var/opt/lighttpd Lighttpd extension libraries
/var/opt/net-snmp Net-SNMP working directory


Nagwin contains standard Nagios Core and should be able to monitor any device as long as you have monitoring plugins for it. Nagwin has already a small set of plugins ready to use in the /plugins directory, and there are a large number of plugins available at Nagios Exchange. However, due to Nagwin's limited environment and Windows, there may be a limited support. You need to try and find out yourself. 

 By default, Nagwin is configured to monitor your local machine. See following pages for some basic examples. Nagios configuration files are located at etc\nagios directory. Main configuration file nagios.cfg is configured to accept all configuration files in the subdirectory nagwin.  Consult available Nagios documentation to move forward and extend your implementation. Nagwin FAQs available here can also help.

For notification purposes, you can use blat, which is installed as a part of the package (see Nagios.cfg for examples).



How can I change the password of nagiosadmin user?
  • Open a DOS command prompt
  • Change working directory to the Nagwin installation directory\bin 
  • Run the following command to update the password:


htpasswd2 -b /etc/lighttpd/htpasswd nagiosadmin new-password
How can I get notified by e-mail in Nagwin ?

Nagwin has blat smtp mailer included. The first step is to let blat save your smtp server settings for later use:


bin/blat -SaveSettings -f from-address -server your.smtp.server -u login -pw password


  • You need also to specify your e-mail address for the contact nagiosadmin in etc/nagios/nagwin/contacts.cfg:

define contact{
        contact_name   nagiosadmin ; .....
        use generic-contact ; .....
        alias  Nagios Admin ; .....

        email ******@******    ; << CHANGE THIS TO YOUR EMAIL ADDRESS


  • As a last step, You need to update smtp server information in two notification commands etc/nagios/nagwin/commands.cfg:

# 'notify-host-by-email' command definition
define command{
    command_name    notify-host-by-email
    command_line    /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo: $HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /bin/blat - -to $CONTACTEMAIL$ -subject "** $NOTIFICATIONTYPE$ Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" -server smtp.server

# 'notify-service-by-email' command definition
define command{
    command_name    notify-service-by-email
    command_line    /usr/bin/printf "%b" "***** Nagios *****\n\nNotification Type: $NOTIFICATIONTYPE$\n\nService: $SERVICEDESC$\nHost: $HOSTALIAS$\nAddress: $HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditional Info:\n\n$SERVICEOUTPUT$\n" | /bin/blat - -to $CONTACTEMAIL$ -subject "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$ is $SERVICESTATE$ **" -server smtp.server

Replace smtp.server by name/ip of your smtp server (your Exchange server for example). Make sure that your smtp server is configured to accept smtp requests from Nagwin machine.

  • Restart the Nagwin_Nagios service to apply changes.


You can issue the command below to test if your mail notification works:

echo "Test message" | bin\blat - -to mail@address -f from@address -subject "Test mail" -server smtp.server



How to monitor Nagwin itself ?

As you use Nagwin to monitor other hosts, you may wonder how the Nagwin itself can be monitored. This can be achieved by checking status.dat file age and existence of key processes. Here is a recipe to establish an out-of-band monitoring of Nagwin:

  • Make sure that your Nagwin installation is configured to send notifications. See FAQ for instructions.
  • Create bin/ script with the content below (Unix-format):
# customize - start
# customize - end
instroot=$(cygpath -m /)
mkdir -p $logdir
logfile=$logdir/$(date +"%d").log
echo "***" `date` >> $logfile
# Function to report failure, message body as argument
CheckFail ()
printf "$1" | /bin/blat - -to $to -f $from -subject "Nagwin is not operational" -server $server >> $logfile
exit 1
# Function to check a process, process name and expected number of instances as arguments
CheckProcess ()
/plugins/check_winprocess --filter "imagename eq $1.exe" --compare lt --critical $2 >> $logfile
if (($? > 0)); then
CheckFail "Must be at least $2 $1 process(es) running."
# check status.dat age
/plugins/check_winfile --target "$instroot/var/opt/nagios/status.dat" --filter "age lt -15 minutes" --critical 1 --compare eq >> $logfile
if (($? > 0)); then
CheckFail "Nagios status.dat getting old."

# check processes

CheckProcess nagios 4
CheckProcess lighttpd 1
printf "\n" >> $logfile

You need to customize mail configuration (red) according to your setup. The script above checks if status.dat is updated within the last 15 minutes and if key processes are running with an expected number of intances. It will send an e-mail if any of the criteria are not met. Results from checks will be logged in /var/log/check_nagwin directory in a rotating manner for days of a month.

  • Create a Windows scheduled task by using the following command:

schtasks /create /sc minute /mo 15 /tn check-nagwin /tr "nagwin-inst-dir\bin\bash.exe -c /bin/"

This command will create the scheduled task check-nagwin running the script above each 15 minutes.

Nagwin 5.1.2

release date: 
Wed, 03/29/2023

Nagwin product 5.0.0

release date: 
Sat, 04/23/2022

Nagwin product 4.0.0

release date: 
Wed, 12/30/2020

Nagwin 3.4.0

release date: 
Sat, 09/07/2019

Nagwin 3.3.0

release date: 
Sun, 04/14/2019

Nagwin 3.2.0

release date: 
Sun, 08/19/2018

Nagwin 3.1.0

release date: 
Tue, 05/08/2018

Nagwin 3.0.0

release date: 
Tue, 10/17/2017

Nagwin 2.9.0

release date: 
Sun, 06/04/2017

Nagwin 2.8.0 (security)

release date: 
Sat, 04/01/2017

Nagwin 2.6.0 (security)

release date: 
Mon, 10/10/2016

Nagwin 2.5.1

release date: 
Sun, 01/24/2016

Nagwin 2.5.0

release date: 
Tue, 09/29/2015

Nagwin 2.4.1 (security)

release date: 
Fri, 04/24/2015

Nagwin 2.4.0

release date: 
Thu, 03/05/2015

Nagwin 2.3.1

release date: 
Thu, 01/15/2015

Nagwin 2.3.0

release date: 
Thu, 08/14/2014

Nagwin 2.2.1

release date: 
Mon, 06/09/2014

Nagwin 2.2.0

release date: 
Thu, 05/01/2014

Nagwin 2.1.0 (security)

release date: 
Sat, 04/12/2014

Nagwin 2.0.2

release date: 
Tue, 03/04/2014

Nagwin 2.0.1

release date: 
Tue, 12/17/2013

Nagwin 2.0.0

release date: 
Sun, 12/01/2013

Nagwin 1.6.1

release date: 
Tue, 08/20/2013

Nagwin 1.5.1

release date: 
Tue, 01/29/2013

Nagwin 1.5.0

release date: 
Sun, 01/13/2013

Nagwin 1.3.0

release date: 
Sun, 04/22/2012

Release announcements