Problem Description This KB article addresses the following NRPE error: CHECK_NRPE: Error - Could not connect to xxx.xxx.xxx.xxx: Connection reset by peer   Troubleshooting The Error Please refer to the following KB article to define the Nagios XI... Read More

Problem Description You are seeing port 113 return requests either from your Nagios XI server (when submitting NSCA passive results) to the originating host OR you are seeing port 113 return requests when checking NRPE services). You will see this... Read More

Problem Description This KB article explains how to clear the Solaris Maintenance Status on a service, specifically the Nagios Core or NRPE service. This KB article will focus specially on Nagios Core and the resolution, however the steps are... Read More

Overview Nagios Remote Plugin Executor (NRPE) is an agent used by Nagios XI for communicating with remote hosts. Remote hosts are operating systems like Linux and Windows.   This KB article explains: How Nagios XI sends requests to the NRPE Agent... Read More

Problem Description This KB article addresses the following NRPE error: CHECK_NRPE: Error - Could Not Complete SSL Handshake   The NRPE client may also log messages similar to the following in SYSLOG: Dec 11 09:08:14 centos19 xinetd[2567]: FAIL:... Read More

Problem Description This KB article addresses the following NRPE error: CHECK_NRPE: Error Receiving Data From Daemon   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be referenced to completely... Read More

Problem Description This KB article addresses the following NRPE error: NRPE - CHECK_NRPE: Received 0 Bytes From Daemon. Check The Remote Server Logs For Error Messages   Assumed Knowledge The following KB article contains an explanation of how NRPE... Read More

Problem Description This KB article addresses the following NRPE error: CHECK_NRPE: Socket Timeout After n Seconds   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be referenced to completely... Read More

Problem Description This KB article addresses the following NRPE error: NRPE - Command '[Your Plugin]' Not Defined   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be referenced to... Read More

Problem Description This KB article addresses the following NRPE error: Connection Refused By Host   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be referenced to completely understand the... Read More

Problem Description This KB article addresses the following NRPE error: Connection Refused Or Timed Out   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be referenced to completely understand the... Read More

Problem Description This KB article addresses the following NRPE error: Error While Loading Shared Libraries: libssl.so.0.9.8:Cannot Open Shared Object File: No Such File Or Directory   Assumed Knowledge The following KB article contains an... Read More

Problem Description This KB article addresses the following NRPE error: ERROR: Missing Argument Exception   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be referenced to completely understand... Read More

Problem Description This KB article provides a troubleshooting methodology for NRPE problems.   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be referenced to completely understand the problem... Read More

Problem Description In older versions of the Linux NRPE Agent, the memory plugin custom_check_mem did not take into account cached memory as part of the free memory and may create false warning or critical alerts, even though you are NOT low on... Read More

Problem Description This KB article addresses the following NRPE error: No Output Returned From Plugin   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be referenced to completely understand the... Read More

Problem Description This KB article addresses the following NRPE error: NRPE: Unable To Read Output   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be referenced to completely understand the... Read More

Overview This KB article discusses NRPE and the network packet size used in the different versions of the client and the check_nrpe plugin.     Nomenclature The following explains the terms used in this document. Client / Agent This is what is... Read More

Problem Description This KB article describes why you are seeing the following error message on your Nagios server when the check_nrpe plugin is run: Nov 28 08:51:34 office_itx_gentoo check_nrpe: Remote 10.25.11.3 does not support Version 3 Packets... Read More

Problem Description This KB article addresses the following NRPE error: Return Code Of 126 Is Out Of Bounds - Plugin May Not Be Executable   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be... Read More

Problem Description This KB article addresses the following NRPE error: Return Code Of 127 Is Out Of Bounds - Plugin May Be Missing   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be referenced... Read More

Overview This KB article explains how to configure XINETD to stop the logging of successful NRPE connections. Every time the Nagios XI or Nagios Core server connects to the NRPE client, the following is logged in /var/log/messages (or equivalent): Â... Read More

Problem Description This KB article addresses the following NRPE error or variants of this error: UNKNOWN: No Handler For That CommandNo handler for command:Unknown command(s):   Assumed Knowledge The following KB article contains an explanation of... Read More

Overview This KB article discusses NRPE v3/v4 and it's compatibility with previous versions of NRPE and clients that use NRPE such as NSClient++. NRPE v3 has two major improvements over previous versions: Increased packet size up to 64K ... Read More

Problem Description This KB article addresses the following NRPE error: Warning: This Plugin Must Be Either Run As Root Or Setuid   Assumed Knowledge The following KB article contains an explanation of how NRPE works and may need to be referenced to... Read More