Why is Linux server showing falsely as down?

[kellyjos12]

I have a Linux server falsely showing as down on Splunk Web.  I have tried restarting the Linux server and restarting the Splunk forwarder on the Linux server but the issue still remains.

[kellyjos12]

Yes Splunk forwarder is installed on the Linux server.  I am using an alert on a Splunk Search Head.  I'm new to Splunk and still trying to learn.

Thank you,

[gcusello]

HI @kellyjos12,

two questions to better undertand your situation:

• when you say " falsely showing as down on Splunk Web" what do you mean? how do you see that it's down? do you see it or not?
• how do you take logs from the Forwarder? are you using a TA? which one?

Anyway, you should take the logs from the Forwarder using the TA_Linux (https://splunkbase.splunk.com/app/833/) but the detection of server down usually is done using the Splunk internal logs: if you have Splunk internal logs from that server the server is up otherwise is down.

You could say that in this way you can only know that the Splunk Forwarder is up or down but even if the server is up and the Forwarder is down you are blind, so the best thing is to check the status of the Forwarder.

So, have you the logs from that server in Splunk? you can check using a simple search:

index=_internal host=<your_host>

if you have results the Forwarder is up and running, if you haven't, you have to debug why, but it's a different problem.

Ciao.

Giuseppe

[gcusello]

Hi  @kellyjos12.,

let me understand:

• you have Linux server with an Heavy Forwarder installed on,
• you monitor it and sometimes you have the message that the server is down;

is this correct?

how do you have the status of down?

which app are you using for monitoring the server?

Ciao.

Giuseppe