Nagios Support Forum

It may be worth mentioning as well to download or wget the plugin check_tcping from the Nagios exchange

https://exchange.nagios.org/components/ ... 2&cf_id=24

yum install gcc

unzip/tar

man unix

place into /usr/local/nagios/libexec/

chown nagios:nagios /usr/local/nagios/libexec/check_tcping
chmod 775 /usr/local/nagios/libexec/check_tcping

Thanks, I am aware

Great, since you've created the command with the plugin.

Now, if you wanted this on a specific host --> in the Core Config Manager --> click on a host you want to use the plugin with, and add the check_tcping to the check_command. Add your warnings and criticals.

Save --> apply configuration, and now it should work.

Here's my screenshot for a better image.
You may have to force an immediate check on that host if you don't see the results for check_tcping, but overall this worked for me.

I hope this helps.

I tested it via your steps

on the host screen under the command in ARG1 through ARG4 added similar 10,20,30,40...
Is there a more appropriate number that should be used for each ARG?

Are these ARG's high and low thresholds etc?

I then went down to the Run Check Command and tested for no errors

/usr/local/nagios/libexec/check_tcping -w 10,20 -c 30,40 Hostname
TCPING OK: Packet loss = 0.00%, RTA = 3.54 ms

I clicked save and applied the config when prompted

Now what is needed to push this out via Bulk Modifications tool?

The thresholds for warnings and critical are up to you. (I just threw in random numbers to see if it's working)

Assuming this plugin is the similar to check_ping --help
check_tcping --help RTA is the average travel time, and %loss should be packet loss percentage.

I don't know your requirements, but I think the default settings for thresholds on check_ping in localhost is a good default. They should be OK, but it's up to you. Once you have the thresholds you want, in the Bulk Modifcations Tools --> click "change command and arguments" Find check_tcping, add in your threshold ARGS.
Then select the hosts you want this plugin to be applied to. Then save changes.

I hope this helps.

Yes it does help, though we are now seeing 100% loss on switches and win servers, everything else seems happy.

Host Down: TCPING CRITICAL: Packet loss = 100.00%, RTA = (not available due to 100% packets lost)

Guess those have something specific that need to be done to allow tcping vs ICMP?

I can't be sure since it's an exchange plugin.

What happens if you use check_icmp on a win server or switch?

Does it work or is it critical?

tried switching it back to check_icmp (ping)

and all I get is:

check_ping: %s: Warning threshold must be integer or percentage!

nevermind found an article 20 deep that shows you have to use a percent sign..

Does Nagios have a page with all the commands and their default settings?

So put in 100.0,20% and 200.0,40% in ARG1 and ARG2

This made the errors go away

Just followed up with the switches and adding back the check_icmp and they are now clear as well

Great to hear that!

Is this resolved for you? Did you have any more questions on this or are we okay to lock this up?