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404 errors after upgrade from 2024R1.1.2 to 2024R1.1.3Active Directory / LDAP Troubleshooting Authentication IntegrationBackups are not being generated due to tar creation errorsCCM says unapplied changes exist, but none listedCHECK_NRPE Error Could not connect to xxx.xxx.xxx.xxx Connection reset by peerDatabase Storage Engine and High CPU usage in Nagios XIDisabling Port 113 IDENT RequestsERROR Please add the ’Optional’ channel to your Red Hat systems subscriptionsError Invalid max_check_attempts value for hostHow To Clear Solaris Service Maintenance StatusNagios XI -ERROR unable to open include file conf.d/.cfgNagios XI 2014 Upgrade Issue CONFIG ERRORNagios XI Ajaxterm Installation AbortedNagios XI Apply Configuration Fails Backend login to the Core Configuration failedNagios XI Apply Configuration Never CompletesNagios XI Can’t Log Into The Web InterfaceNagios XI CentOS 6 Installation Problems XI 2011R1.7 2011R1.8Nagios XI Checking System StatusNagios XI Common Upgrade Failures And SolutionsNagios XI Configuration Applies, No Changes Take PlaceNagios XI Configuration Applies, but still get Configuration File Is Out Of Date ErrorNagios XI Configuration Verification FailedNagios XI Core 4 Load Spikes on 1.75 and 7 Hour IntervalsNagios XI Crashed Database TablesNagios XI Debugging Bandwidth Performance GraphsNagios XI Defining Global Environment VariablesNagios XI Disabling Database UTF8 ConnectivityNagios XI ERROR PostgresQL not running exitingNagios XI ERROR unable to open include file /etc/mrtg/conf.d/xxxxxxx.cfgNagios XI Empty Screen for Wizard, Component, DashletNagios XI Error while converting SVGNagios XI Event Data Is StaleNagios XI HTTP 500 Error / PHP Parse error Unexpected $endNagios XI HTTP 500 Error / White Screen After LoginNagios XI High Availability and Failover Solutions for Nagios XI NWC14Nagios XI Host Still Visible After Deletion (Ghost Hosts)Nagios XI Hosts Pending/GrayNagios XI ICMP and Ping Checks Stopped GraphingNagios XI Installing XI Fails To Install Dependency pymssqlNagios XI Issues with mod_gearman and Performance Data Newlines \nNagios XI LDAP / Active Directory Import Users Certificate IssuesNagios XI Last Check Time Not UpdatingNagios XI Login Screen Keeps Redirecting To ItselfNagios XI MK Livestatus Problems With Mod GearmanNagios XI MRTG Reports SNMP_Session ErrorsNagios XI MSSQL Query Wizard Invalid characters in the usernameNagios XI MSSQL Wizards Adaptive Server connection failedNagios XI Missing localhost AlertsNagios XI Notification ProblemsNagios XI Notifications Not Sending In XI 5.3.0Nagios XI Oracle Services Critical After Nagios XI UpgradeNagios XI Performance Graph ProblemsNagios XI Plain Text Password ConsiderationsNagios XI Problems Using Nagios XI With ProxiesNagios XI Problems With Scheduled Backups At MidnightNagios XI Problems with $ Signs in the Check CommandNagios XI Profile Build FailedNagios XI Receiving IPv6 SNMP TrapsNagios XI Reset Security CredentialsNagios XI Reset Upgrade Status In Web InterfaceNagios XI Resetting The nagiosadmin PasswordNagios XI Resizing the VM Disk SizeNagios XI Resolving Cannot connect to database Error Core Config ManagerNagios XI Running Out Of Disk Space On The Nagios XI VMNagios XI SNMP MIB Upload ProblemsNagios XI SNMPTT Service generates Cannot find module errorsNagios XI SQL Error [nagiosxi] -ERROR -syntax errorNagios XI Schedulded Backups No Longer WorkingNagios XI Scheduled Downtime Not WorkingNagios XI Scheduled Reports Not RunningNagios XI Some BPI Checks Show Unknown BPI Group Index After UpgradeNagios XI SourceGuardian Errors 2009R1.2CNagios XI Status Information Cut Off At 256 CharactersNagios XI Troubleshooting ReportsNagios XI Unable To Login Using Two Factor AuthenticationNagios XI Unable to Delete HostNagios XI Upgrade errors root.crontab.orig cannot overwrite existing fileNagios XI Uploaded plugin returns /bin/bash^M bad interpreter No such file or directoryNagios XI Warning Duplicate definition found for contact ’xi_default_contact’Nagios XI Windows Memory Usage PhysicalNagios XI mysql_error out of range value for columnPerformance Graphs Showing Data during Host Down Time PeriodsSlack Notifications Stopped WorkingUpgrade error with XI and non standard Broker ModulesUpgrading to NDO 3 after having been downgraded in newer versions of Nagios XIWeb Browser Reports 330 Error Content EncodingXI 5.4 monitoring engine not running/usr/local/nagiosxi/var/xi itype No such file or directory error

CHECK_NRPE: Error - Could not connect to xxx.xxx.xxx.xxx: Connection reset by peer

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 server's IP address as being allowed to communicate with NRPE:

NRPE - CHECK_NRPE: Error - Could Not Complete SSL Handshake

Final Thoughts

For any support related questions please visit the Nagios Support Forums at:

http://support.nagios.com/forum/

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