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check_x224 Featured

18 votes
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Checks that the most basic parts of a Remote Desktop connection succeeds.
The Remote Desktop protocol builds on a protocol called x224. This plugin checks that the initial and most basic parts of a Remote Desktop connection - the part which is specified by x224 - succeeds. I.e., it does a bit more than a TCP connection test at port 3389.

There is a python3 verson available at
Reviews (9)
We gratefully use this plugin to monitor our servers, from 2008 to 2012. However with 2016 we receive the error message: "x224 CRITICAL: Could not set up connection on port 3389: [Errno 104] Connection reset by peer"

We made sure that NLA is not activated on the server. Are there any plans on your side to make this plugin compatible for 2016 as well?
Very handy, thank you. By the way, to the first person who posted; this plugin runs on the Nagios server.

I'm having some trouble installing this check.
How do I install the check_x224 plugin?

I've added a few lines to my commands.cfg, and added the check to a host, but I guess that the check_x224 needs to be installed on the server?
byFox, November 19, 2012
1 of 1 people found this review helpful
This plugin is working great, and has been for some time to ensure I can always get access to my servers. Nothing worse than finding out something failed and /then/ finding out you can't remote into the thing!

Unfortunately I started adding 2012 servers and immediately get connection refusal errors. 0 for 3 on the 2012 ones, and working just fine on all the others, and I can RDP into the servers. Guessing MS changed something. Attempting to look over the packet structure and find the issue...
Owner's reply

Maybe you were an early Windows Server 2012 adopter and tested the plugin before it was ready for Windows Server 2012.

The plugin supports checking Windows Server 2012; I suggest you try again.

Thanks, this is the first usable RDP check script I've found which does some actual protocol checking :-)
byLaggAt, June 4, 2012
Downloaded and configured in minutes, has performance data, all good! Thanks!
byCaptSpify, April 27, 2012
1 of 1 people found this review helpful
Requires Python2. If you have Python3 and Python2 installed, open the file, and make sure the first line lists Python2 as the env
Owner's reply

There is now a Python 3 version at

byjoda78, March 18, 2012
python script works perfect - much better solution than simple tcp check...
byluupuxall, February 8, 2011
1 of 1 people found this review helpful
Simply and fast
Many many tanks