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Monitor Linux Server With Nagios Core Using SNMP Configure SNMP to start when the server boots: If you have a firewall configured, ensure that you have UDP port 161 open to your SNMP lookup server. [1416634449] Error: External command failed -> PROCESS_SERVICE_CHECK_RESULT;snmpsender;SNMP Traps;0;The SNMP trap that is generated as a result of an event with the service CentOS Users 1 USERS WARNING - 1 users currently logged in / nSvcHostname (OCTETSTR):CentOS nSvcDesc (OCTETSTR):Users nSvcStateID (INTEGER):0 nSvcOutput (OCTETSTR):USERS OK - 0 users currently logged in, [1416634449] External command error: Command failed, The "SNMP Traps" service will appear as an Unconfigured object under Admin > Monitoring Config > Unconfigured Objects. All rights reserved. All other servicemarks and trademarks are the property of their respective owner. Simple Network Management Protocol (SNMP) gives access to Sophos Firewall information, for example, the status of the firewall, service availability, CPU, memory, and disk usage. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. These steps help confirm that the snmptrapd service is working correctly. Unless you have very intimate knowledge of the web server and the jsp you're monitoring, making it trap upon a broken load will likely be impossible. The way the service state is being reflected in Nagios is when we send the SEVERITY value using the "$s" variable. Within a minute or so the everything should return back to an OK state on the RECEIVING SNMP server. These steps were performed using CentOS-6.5-x86_64-bin-DVD1.iso, Select Install or upgrade an existing system. Now let's test Critical. It is available in the normal Windows package (Add/Remove Windows Components) under Management and Monitoring tools. The top screenshot is the SNMP Sender monitoring the CentOS sever and the bottom screenshot is the SNMP Receiving server configured with SNMP Trap services. Install CentOS on VirtualBox3. Here you will see something similar to the picture below: Now a trap for each of these services has been sent through to the RECEIVING SNMP server. Contact Us, Awards Correct. SNMP Trap Nagios XI Wizard So far we have identified the following: The next step is to learn about SNMP OIDs and MIBs. Now you'll install the required components on the Nagios XI SNMP Receiver server so it will accept SNMP Traps. Learn how to monitor an AKCP sensorProbe2 device with Nagios XI to be alerted when temperature, humidity, or other environmental variables exceed specific thresholds.