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Common Problems (25)
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CHECK_NRPE: Error - Could not connect to xxx.xxx.xxx.xxx: Connection reset by peer
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Disabling Port 113 IDENT Requests
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How To Clear Solaris Service Maintenance Status
article
NRPE - Agent and Plugin Explained
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NRPE - CHECK_NRPE: Error - Could Not Complete SSL Handshake
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NRPE - CHECK_NRPE: Error Receiving Data From Daemon
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NRPE - CHECK_NRPE: Received 0 Bytes From Daemon. Check The Remote Server Logs For Error Messages
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NRPE - CHECK_NRPE: Socket Timeout After n Seconds
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NRPE - Command ’[Your Plugin]’ Not Defined
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NRPE - Connection Refused By Host
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NRPE - Connection Refused Or Timed Out
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NRPE - Error While Loading Shared Libraries: libssl.so
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NRPE - ERROR: Missing Argument Exception
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NRPE - General Troubleshooting Tips
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NRPE - Linux Cached Memory Not Added to Free Memory
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NRPE - No Output Returned From Plugin
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NRPE - NRPE: Unable To Read Output
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NRPE - Packet Size Explained
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NRPE - Remote does not support Version 3 Packets
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NRPE - Return Code Of 126 Is Out Of Bounds - Plugin May Not Be Executable
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NRPE - Return Code Of 127 Is Out Of Bounds - Plugin May Be Missing
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NRPE - Turn Off XINETD Logging On Success
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NRPE - UNKNOWN: No Handler For That Command
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NRPE - v3/v4 Compatibility With Previous Versions
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NRPE - Warning: This Plugin Must Be Either Run As Root Or Setuid
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Common Problems Articles RSS FeedIcon Subscriber Subscribe
CHECK_NRPE: Error - Could not connect to xxx.xxx.xxx.xxx: Connection reset by peer
Viewed 19166 times since Fri, Jul 14, 2017
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
Disabling Port 113 IDENT Requests
Viewed 3386 times since Tue, Mar 12, 2019
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
How To Clear Solaris Service Maintenance Status
Viewed 20367 times since Mon, Mar 6, 2017
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
NRPE - Agent and Plugin Explained
Viewed 43176 times since Fri, Jul 14, 2017
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
NRPE - CHECK_NRPE: Error - Could Not Complete SSL Handshake
Viewed 90284 times since Fri, Jul 14, 2017
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
NRPE - CHECK_NRPE: Error Receiving Data From Daemon
Viewed 7788 times since Mon, Jul 17, 2017
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
NRPE - CHECK_NRPE: Received 0 Bytes From Daemon. Check The Remote Server Logs For Error Messages
Viewed 6850 times since Mon, Jul 17, 2017
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
NRPE - CHECK_NRPE: Socket Timeout After n Seconds
Viewed 66803 times since Sun, Jul 16, 2017
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
NRPE - Command ’[Your Plugin]’ Not Defined
Viewed 5690 times since Mon, Jul 17, 2017
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
NRPE - Connection Refused By Host
Viewed 11567 times since Mon, Jul 17, 2017
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
NRPE - Connection Refused Or Timed Out
Viewed 6268 times since Mon, Jul 17, 2017
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
NRPE - Error While Loading Shared Libraries: libssl.so
Viewed 6704 times since Mon, Jul 17, 2017
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
NRPE - ERROR: Missing Argument Exception
Viewed 3468 times since Mon, Jul 17, 2017
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
NRPE - General Troubleshooting Tips
Viewed 9827 times since Mon, Jul 17, 2017
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
NRPE - Linux Cached Memory Not Added to Free Memory
Viewed 6368 times since Wed, Jan 27, 2016
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
NRPE - No Output Returned From Plugin
Viewed 11812 times since Mon, Jul 17, 2017
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
NRPE - NRPE: Unable To Read Output
Viewed 57310 times since Mon, Jul 17, 2017
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
NRPE - Packet Size Explained
Viewed 16114 times since Thu, Jun 30, 2016
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
NRPE - Remote does not support Version 3 Packets
Viewed 17457 times since Mon, Nov 27, 2017
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
NRPE - Return Code Of 126 Is Out Of Bounds - Plugin May Not Be Executable
Viewed 5390 times since Fri, Jul 14, 2017
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
NRPE - Return Code Of 127 Is Out Of Bounds - Plugin May Be Missing
Viewed 16138 times since Fri, Jul 14, 2017
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
NRPE - Turn Off XINETD Logging On Success
Viewed 9243 times since Tue, Mar 7, 2017
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
NRPE - UNKNOWN: No Handler For That Command
Viewed 10522 times since Mon, Jul 17, 2017
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
NRPE - v3/v4 Compatibility With Previous Versions
Viewed 31229 times since Fri, Jun 24, 2016
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
NRPE - Warning: This Plugin Must Be Either Run As Root Or Setuid
Viewed 6919 times since Mon, Jul 17, 2017
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
 
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