<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta http-equiv=Content-Type content="text/html; charset=us-ascii"> <meta name=Generator content="Microsoft Word 11 (filtered medium)">  <style>  </style> </head> <body lang=EN-US link=blue vlink=blue> <div class=Section1> Sukesh,<o:p></o:p> <o:p> </o:p> <ol style='margin-top:0in' start=1 type=1> <li class=MsoNormal style='color:navy;mso-list:l1 level1 lfo2'>Can you execute this command and also check if you have proper version of nrpe running on both client and server.<o:p></o:p></li> </ol> <o:p> </o:p> Without SSL<o:p></o:p> $./check_nrpe -H xxxxx -n<o:p></o:p> NRPE v2.9<o:p></o:p> <o:p> </o:p> With SSL<o:p></o:p> $./check_nrpe -H xxxxx <o:p></o:p> NRPE v2.9<o:p></o:p> <o:p> </o:p> <ol style='margin-top:0in' start=2 type=1> <li class=MsoNormal style='color:navy;mso-list:l1 level1 lfo2'>Can you can run the nrpe command locally with check_nrpe<o:p></o:p></li> </ol> <o:p> </o:p> ./check_nrpe –H localhost –c command<o:p></o:p> <o:p> </o:p> <ol style='margin-top:0in' start=3 type=1> <li class=MsoNormal style='color:navy;mso-list:l1 level1 lfo2'>Can you see if the plugin are located as configured in the nrpe.cfg?<o:p></o:p></li> <li class=MsoNormal style='color:navy;mso-list:l1 level1 lfo2'>Can you verify if nagios user has execute permission to run plugins?<o:p></o:p></li> </ol> <o:p> </o:p> Regards,<o:p></o:p> Narendan Neelamegam<o:p></o:p> <o:p> </o:p> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: nagios-users-bounces@lists.sourceforge.net [mailto:nagios-users-bounces@lists.sourceforge.net] On Behalf Of tom.welsh@bt.com Sent: Friday, October 12, 2007 3:59 PM To: sukesh.v@jigrahak.com; nagios-users@lists.sourceforge.net Subject: Re: [Nagios-users] nrpe problem<o:p></o:p> </div> <o:p> </o:p> Hi <o:p></o:p> <o:p> </o:p> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabIndex=-1> </div> From: Sukesh /IT/BLR/JIG/IN [mailto:sukesh.v@jigrahak.com] Sent: 12 October 2007 04:17 To: Welsh,T,Tom,DLS C Subject: RE: [Nagios-users] nrpe problem<o:p></o:p> This is my remote host log messages<o:p></o:p> <o:p></o:p> Oct 11 07:00:13 ngapps-prd xinetd[619]: START: nrpe pid=1767 from=192.168.1.84 Oct 11 07:00:15 ngapps-prd nrpe[1767]: Could not read request from client, bailing out... Oct 11 07:00:15 ngapps-prd xinetd[619]: EXIT: nrpe status=0 pid=1767 duration=2(sec)<o:p></o:p> <o:p> </o:p> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabIndex=-1> </div> From: tom.welsh@bt.com [mailto:tom.welsh@bt.com] Sent: Thursday, October 11, 2007 6:07 PM To: sukesh.v@jigrahak.com; nagios-users@lists.sourceforge.net Subject: RE: [Nagios-users] nrpe problem<o:p></o:p> From: nagios-users-bounces@lists.sourceforge.net [mailto:nagios-users-bounces@lists.sourceforge.net] On Behalf Of Sukesh /IT/BLR/JIG/IN Sent: 11 October 2007 10:48 To: nagios-users@lists.sourceforge.net Subject: [Nagios-users] nrpe problem<o:p></o:p> <div> Hi<o:p></o:p> </div> <div> Iam running nagios-3.0a4 and nrpe V2.8.1.iam not getting the result while running ./check_nrpe -H <IP Address>. alreday no firewall is running behind those servers .tried to put '-t' option also but didn't work.Still iam able to telnet 5666 with out any problem/so please help him for this.(iam able to access one server and client using nrpe daemon other could not)/<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> <div> Thanks,<o:p></o:p> Sukesh .<o:p></o:p> <div> <o:p></o:p> Hi Sukesh,<o:p></o:p> From reading your email i take it you can sucessfully connect to the remote NRPE host via telnet.<o:p></o:p> user<a href="mailto:user2@usel">2@usel</a>:~> telnet host1.somedomain.com 5666 Trying xxx.xxx.xxx.199... Connected to host1.somedomain.com. Escape character is '^]'.<o:p></o:p> If this is correct then NRPE is accepting connections.<o:p></o:p> You said in the previous mail that NRPE is working correctly on one machine but not on another. This sounds like you have some configuration differences between the two boxes.<o:p></o:p> We really need to have more details to help you with this problem.<o:p></o:p> What OS is running on the two remote boxes?<o:p></o:p> Is it the same OS on both boxes.<o:p></o:p> Can you send snippets off your configuration THAT RELATE TO nrpe? NRPE.CFG. SERVICES.CFG CHECKCOMMAND.CFG etc<o:p></o:p> Have you carried out the following<o:p></o:p> Turn on debugging on the remote host running nrpe and see what comes out in the logs?<o:p></o:p> To do this edit your nrpe.cfg file and turn debugging on<o:p></o:p> debugging=1<o:p></o:p> An example off NRPE debugging turned on<o:p></o:p> Oct 11 13:30:01 host1 nrpe[3950]: Added command[check_dns1]=/usr/local/nagios/libexec/check_dns -H <a href="http://www.teeks.org">www.teeks.org</a> -w 1 -c 2 Oct 11 13:30:01 host1 nrpe[3950]: Added command[check_swap]=/usr/local/nagios/libexec/check_swap -w 30% -c 20% Oct 11 13:30:01 host nrpe[3950]: Added command[check_ntp]=/usr/local/nagios/libexec/check_ntp -H xxx.xxx.xxx-t 15 Oct 11 13:30:01 host nrpe[3950]: INFO: SSL/TLS initialized. All network traffic will be encrypted. Oct 11 13:30:01 host nrpe[3950]: Handling the connection...<o:p></o:p> <o:p></o:p> Hi Sukesh,<o:p></o:p> Please dont respond to me directly. Please respond via the mailing list. Also please ost your reply comments at the bottom off teh email as it makes it easier to read it in chronological order. Well enough off that spagetti, back to your problem.<o:p></o:p> Your log extract<o:p></o:p> ---------------<SNIP>---------------<o:p></o:p> Oct 11 07:00:13 ngapps-prd xinetd[619]: START: nrpe pid=1767 from=192.168.1.84 Oct 11 07:00:15 ngapps-prd nrpe[1767]: Could not read request from client, bailing out... Oct 11 07:00:15 ngapps-prd xinetd[619]: EXIT: nrpe status=0 pid=1767 duration=2(sec) ---------------<SNIP>--------------- <o:p></o:p> </div> </div> </div> <div> This really does not tell me anything. I take it you have already goggled for "nrpe + Could not read request from client, bailing out..." and found the Nagios FAQ about this. It doset look like its your problem but I dont know as you have provided only one piece off te information i asked for.<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> So here we go again.<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> 1. <o:p></o:p> </div> <div> >>"./check_nrpe -H <IP Address>. already no firewall is running behind those servers .tried to put '-t' option also but didn't <o:p></o:p> </div> <div> >>work."<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> Please paste the output off the above command when you run it against your two hosts. I take it you are running the check_nrpe command as the user nagios?<o:p></o:p> </div> <div> Here is an example that I ran on my nagios server connecting to one off my remote NRPE boxes<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> usel:~ # su - nagios<o:p></o:p> </div> <div> <a href="mailto:nagios@usel">nagios@usel</a>:~> id uid=1001(nagios) gid=100(users) groups=100(users),1001(nagcmd)<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> /usr/local/nagios/libexec/check_nrpe -H xxx.xxx.xxx.xxx -p 5666 -c check_users USERS OK - 0 users currently logged in |users=0;5;10;0<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> 2.<o:p></o:p> </div> <div> >>Still I am able to telnet 5666 with out any problem/<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> Please paste in the output off your telnet sessions to both boxes and the syslog/messages output on the remote hosts like I have below.<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> <a href="mailto:nagios@usel">nagios@usel</a>:~> telnet xxx.xxx.xxx.xxx 5666 Trying xxx.xxx.xxx.xxx... Connected to xxx.xxx.xxx.xxx. Escape character is '^]'.<o:p></o:p> </div> <div> 3.<o:p></o:p> </div> <div> >>so please help him for this.<o:p></o:p> </div> <div> We will If you provide us with more information<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> 4.<o:p></o:p> </div> <div> >> (iam able to access one server and client using nrpe daemon other could not)<o:p></o:p> </div> <div> Show us. Post your output above as host1( working) host2(non-working)<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> The problem is probably going to be related to differences between your two remote nrpe hosts. To understand this you need to tell us what OS you are running on the boxes and also other relevant information. Things like the following<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> 4.1 OS Version<o:p></o:p> </div> <div> Host1 (working<o:p></o:p> </div> <div> Host2 (non-working)<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> 4.2 ./configure syntax used to create makefile<o:p></o:p> </div> <div> Host1 (working<o:p></o:p> </div> <div> <div> Host2 (non-working)<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> 4.3 SSL - is it installed on both boxes and is the development libs also there. something like "rpm -qa | grep ssl" on a Redhat box would show you what ssl related stuff you have installed<o:p></o:p> </div> <div> Host1 (working<o:p></o:p> </div> <div> <div> Host2 (non-working)<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> <o:p></o:p> </div> <div> If you provide the above info it is entirely possible that whilst going through the steps to gather the info you might actually "stumble" across the cause off your problem.<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> I look forward to hearing back from you<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> Regards<o:p></o:p> </div> <div> <o:p></o:p> </div> <div> Tom<o:p></o:p> </div> </div> <div> <o:p></o:p> </div> </div> </div> </body> </html>