Nagios Support Forum

In the last few days, I have had difficulty monitoring switches / routers. I follow the tutorial:
Https://assets.nagios.com/downloads/nag ... uters.html
I have searched many tutorials on the internet but the situation is still not good ............... Looking forward to your help
Here is the error: CRITICAL: (Service check timed out after 60.01 seconds)
http://imageshack.com/a/img922/3798/fojBDR.png
I use nagios core 4.3.1 .

The fact that you are getting the message (Service check timed out after 60.01 seconds)

Is indicating that your Nagios server is not getting a response when polling the server via SNMP

You may want to verify that the SNMP device on the Linksys is still working properly and that the community string hasn't been inadvertently changed

scottwilkerson wrote:The fact that you are getting the message (Service check timed out after 60.01 seconds)

Is indicating that your Nagios server is not getting a response when polling the server via SNMP

You may want to verify that the SNMP device on the Linksys is still working properly and that the community string hasn't been inadvertently changed

Thank for your reply... Could you help me fix this like giving some advices about this error. I've been trying to fix it for 3 days now but it hasn't been fixed. Please help me.

I would see if you can run some snmpget or snmpwalk commands from the command line on your Nagios server targeting the linux device to see if you can get a response.

I can only snmpwalk on the localhost but not the router.

Page 75: http://www.cisco.com/c/dam/en/us/td/doc ... RW224P.pdf

This doesn't sound like a Nagios problem, but a Linksys problem. Are you able to poll SNMP on the linksys device from another Linux machine or...anything?

If you have a Windows desktop, you could try something like https://www.manageengine.com/products/m ... free-tool/ . Once we know that you can get SNMP info from the linksys device, we can dig a little deeper on the Nagios.

Are you able to use SNMP for any other devices from Nagios?

Turn the SNMP service on, on the router. If you can't SNMP walk then Nagios can't poll information, simple as that.

A good way to check from the Nagios machine if the port is open will be by running a nmap against the router. IIRC, you're looking for port 161 or 162 to be open.

Thanks for the assist, @rkennedy!