Hi Pablo.
Thanks for the fast reply. Yes, if I change the key I get the same error: [root@nagios]# /usr/lib64/nagios/plugins/check_snmp -P 3 -U snmpv3user -L authPriv -a MD5 -A v3p4ssword#1 -x DES -X v3p4ssword#2 -H 192.168.254.2 -o 1.3.6.1.2.1.1.3.0 External command error: snmpget: Authentication failure (incorrect password, community or key) Could it be the version of check_snmp that is causing this problem? [root@nagios]# /usr/lib64/nagios/plugins/check_snmp --version check_snmp v1.4.16 (nagios-plugins 1.4.16) regards, Pedro Röseler From: Help [mailto:help-bounces+pedro.roeseler=av.it...@monitoring-plugins.org] On Behalf Of pablo muñoz Sent: 7 de julho de 2015 15:47 To: Monitoring Plugins Users Subject: Re: Cannot use snmp_check with snmp v3 Hello. He is sure that the keys are well? try to translate the MIB DISMAN-EVENT-MIB :: sysUpTimeInstance For example: /usr/lib64/nagios/plugins/check_snmp -H 192.168.254.2 -o .1.3.6.1.2.1.1.3.0 -P 3 -L authPriv -a MD5 -x DES -X v3p4ssword#2 -U snmpv3user -A v3p4ssword#1 Atte. Pablo A. Muñoz Rojas Reseller Nagios & Nagios Community Manager <http://www.nagios.org/communitynetwork> P: +56-32-3140734 | C: +56-9-85499668 w: www.e-visus.cl <http://www.e-visus.cl/> – www.nagios-cl.org <http://www.nagios-cl.org/> | d: Ecuador 85, Viña del Mar, Chile Nagios Certified Administrator and Professional - 3HCL9F <http://www.nagios.com/verify/> Nuestras redes: Linkedin <https://cl.linkedin.com/in/pablomunozrojas/> - Twitter <https://twitter.com/Nagios_Chile> - Line <http://www.e-visus.cl/?p=241> - skype <http://www.e-visus.cl/?p=241> - facebook <https://www.facebook.com/evisus4nagios> 2015-07-07 11:17 GMT-03:00 José Pedro Brito Röseler <pedro.roese...@av.it.pt>: Hello. I’m trying to check the uptime of a Cisco 2960X switch on Nagios with check_snmp plugin but I always get the following error: [root@nagios]# /usr/lib64/nagios/plugins/check_snmp -P 3 -U snmpv3user -L authPriv -a MD5 -A v3p4ssword#1 -x DES -X v3p4ssword#2 -H 192.168.254.2 -o DISMAN-EVENT-MIB::sysUpTimeInstance External command error: snmpget: Authentication failure (incorrect password, community or key) I get the same error on the web console: My switches.conf is like this: # HOST DEFINITIONS # ############################################################################### ############################################################################### # Define the switch that we'll be monitoring define host{ use generic-switch,host-pnp host_name cisco_2960x_IT2_Datacenter alias cisco 2960x 24p IT2 Datacenter address 192.168.254.2 hostgroups switches_v3 notification_interval 60 icon_image switch.png statusmap_image switch40.png } ############################################################################### ############################################################################### # # HOST GROUP DEFINITIONS # ############################################################################### ############################################################################### # Create a new hostgroup for switches define hostgroup{ hostgroup_name switches ; The name of the hostgroup alias Network Switches ; Long name of the group } define hostgroup{ hostgroup_name switches_v3 ; The name of the hostgroup alias Network Switches with SNMP v3 ; Long name of the group } ############################################################################### ############################################################################### # # SERVICE DEFINITIONS # ############################################################################### ############################################################################### ########## Switches with SNMP V3 ################### # Service definition to monitor switch uptime using check_snmp # Monitor uptime via SNMP define service{ use generic-service hostgroup_name switches_v3 service_description Uptime check_command check_snmp!-P 3 -U snmpv3user -L authPriv -a MD5 -A v3p4ssword#1 -x DES -X v3p4ssword#2 -o DISMAN-EVENT-MIB::sysUpTimeInstance } If I do the same test with snmpget, everything runs fine: [root@nagios]# snmpget -v3 -l authPriv -u snmpv3user -a MD5 -A v3password#1 -x DES -X v3password#2 192.168.254.2 DISMAN-EVENT-MIB::sysUpTimeInstance DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (783093831) 90 days, 15:15:38.31 snmpwalk also runs without problems: [root@nagios]# snmpwalk -v3 -l authPriv -u snmpv3user -a MD5 -A v3password#1 -x DES -X v3password#2 192.168.254.8 DISMAN-EVENT-MIB::sysUpTimeInstance DISMAN-EVENT-MIB::sysUpTimeInstance = Timeticks: (783167495) 90 days, 15:27:54.95 Do you have any idea of what might be happening? I’m using a FAN installation on Centos. [root@nagios]# uname -a Linux nagios 2.6.18-400.1.1.el5 #1 SMP Thu Dec 18 00:59:53 EST 2014 x86_64 x86_64 x86_64 GNU/Linux Thanks in advance for your help! Best regards, Pedro Röseler
