nrpe ssh handshake error

Manish Kumar manikumar85 at gmail.com
Tue Feb 7 19:57:33 CET 2012
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The details of the issue is below:-

*When nrpe service on HP-UX started using this command: *

/usr/local/nagios/bin/nrpe -c /usr/local/nagios/etc/nrpe.cfg -d


*And from nagiosXI server:*

[root at mmkndnagxi libexec]# ./check_nrpe -H 10.204.100.74 -n -p 5667 -c
check_mem -a '-w 65 -c 75'

CHECK_NRPE: Socket timeout after 10 seconds.

[root at mmkndnagxi libexec]# ./check_nrpe -H 10.204.100.74 -n -t 90 -p 5667
-c check_mem -a '-w 65 -c 75'

CHECK_NRPE: Error receiving data from daemon.

[root at mmkndnagxi libexec]# ./check_nrpe -H 10.204.100.73 -t 60 -p 5667 -c
check_mem -a '-w 65 -c 75'

CHECK_NRPE: Error - Could not complete SSL handshake.





*When nrpe service on HP-UX started using this command: *

/usr/local/nagios/bin/nrpe -n -c /usr/local/nagios/etc/nrpe.cfg -d


*And from nagiosXI server:*

[root at mmkndnagxi libexec]# ./check_nrpe -H 10.204.100.73 -t 60 -p 5667 -c
check_mem -a '-w 65 -c 75'

CHECK_NRPE: Error - Could not complete SSL handshake.

You have new mail in /var/spool/mail/root

[root at mmkndnagxi libexec]# ./check_nrpe -H 10.204.100.73 -n -p 5667 -c
check_mem -a '-w 65 -c 75'

CHECK_NRPE: Socket timeout after 10 seconds.

[root at mmkndnagxi libexec]# ./check_nrpe -H 10.204.100.73 -n -t 60 -p 5667
-c check_mem -a '-w 65 -c 75'

CHECK_NRPE: Error receiving data from daemon.

[root at mmkndnagxi libexec]#



*------------------------------Monitored Server
Log-----------------------------*

Feb  7 20:34:12 MCPIFDR nrpe[10434]: Daemon shutdown

Feb  7 20:35:22 MCPIFDR nrpe[11237]: Unknown option specified in config
file '/usr/local/nagios/etc/nrpe.cfg' - Line 81

Feb  7 20:35:22 MCPIFDR nrpe[11237]: INFO: SSL/TLS NOT initialized. Network
encryption DISABLED.

Feb  7 20:35:22 MCPIFDR nrpe[11238]: Starting up daemon

Feb  7 20:35:22 MCPIFDR nrpe[11238]: Warning: Could not set effective
GID=111

Feb  7 20:35:22 MCPIFDR nrpe[11238]: Warning: Daemon is configured to
accept command arguments from clients!

Feb  7 20:35:22 MCPIFDR nrpe[11238]: Listening for connections on port 5667

Feb  7 20:37:24 MCPIFDR nrpe[11298]: Could not read request from client,
bailing out...





*$ ps -ef|grep nrpe*

  nagios 11238     1  0 20:35:22 ?         0:00 /usr/local/nagios/bin/nrpe
-n -c /usr/local/nagios/etc/nrpe.cfg -d

  nagios 11332  6726  0 20:39:17 pts/1     0:00 grep nrpe



*$ netstat -an|grep 5667*

tcp        0      0  10.204.100.73.1527     10.142.0.143.56670
FIN_WAIT_2

tcp        0      0  10.204.100.73.5667     *.*                     LISTEN




* telnet to the port 5667 happening successfully in both the cases.*



*
-----------------------------------------------------------nrpe.cfg-----------------------------------
*

#############################################################################

# Sample NRPE Config File

# Written by: Ethan Galstad (nagios at nagios.org)

#

# Last Modified: 11-23-2007

#

# NOTES:

# This is a sample configuration file for the NRPE daemon.  It needs to be

# located on the remote host that is running the NRPE daemon, not the host

# from which the check_nrpe client is being executed.

#############################################################################





# LOG FACILITY

# The syslog facility that should be used for logging purposes.



log_facility=daemon







# PID FILE

# The name of the file in which the NRPE daemon should write it's process ID

# number.  The file is only written if the NRPE daemon is started by the
root

# user and is running in standalone mode.



pid_file=/usr/local/nagios/bin/nrpe.pid







# PORT NUMBER

# Port number we should wait for connections on.

# NOTE: This must be a non-priviledged port (i.e. > 1024).

# NOTE: This option is ignored if NRPE is running under either inetd or
xinetd



server_port=5667







# SERVER ADDRESS

# Address that nrpe should bind to in case there are more than one interface

# and you do not want nrpe to bind on all interfaces.

# NOTE: This option is ignored if NRPE is running under either inetd or
xinetd



server_address=10.204.100.73







# NRPE USER

# This determines the effective user that the NRPE daemon should run as.

# You can either supply a username or a UID.

#

# NOTE: This option is ignored if NRPE is running under either inetd or
xinetd



nrpe_user=nagios







# NRPE GROUP

# This determines the effective group that the NRPE daemon should run as.

# You can either supply a group name or a GID.

#

# NOTE: This option is ignored if NRPE is running under either inetd or
xinetd



nrpe_group=nagios







# ALLOWED HOST ADDRESSES

# This is an optional comma-delimited list of IP address or hostnames

# that are allowed to talk to the NRPE daemon.

#

# Note: The daemon only does rudimentary checking of the client's IP

# address.  I would highly recommend adding entries in your /etc/hosts.allow

# file to allow only the specified host to connect to the port

# you are running this daemon on.

#

# NOTE: This option is ignored if NRPE is running under either inetd or
xinetd



#allowed_hosts=127.0.0.1



only_from=127.0.0.1 10.2.202.221



# COMMAND ARGUMENT PROCESSING

# This option determines whether or not the NRPE daemon will allow clients

# to specify arguments to commands that are executed.  This option only
works

# if the daemon was configured with the --enable-command-args configure
script

# option.

#

# *** ENABLING THIS OPTION IS A SECURITY RISK! ***

# Read the SECURITY file for information on some of the security
implications

# of enabling this variable.

#

# Values: 0=do not allow arguments, 1=allow command arguments



dont_blame_nrpe=1







# COMMAND PREFIX

# This option allows you to prefix all commands with a user-defined string.

# A space is automatically added between the specified prefix string and the

# command line from the command definition.

#

# *** THIS EXAMPLE MAY POSE A POTENTIAL SECURITY RISK, SO USE WITH CAUTION!
***

# Usage scenario:

# Execute restricted commmands using sudo.  For this to work, you need to
add

# the nagios user to your /etc/sudoers.  An example entry for alllowing

# execution of the plugins from might be:

#

# nagios          ALL=(ALL) NOPASSWD: /usr/lib/nagios/plugins/

#

# This lets the nagios user run all commands in that directory (and only
them)

# without asking for a password.  If you do this, make sure you don't give

# random users write access to that directory or its contents!



# command_prefix=/usr/bin/sudo







# DEBUGGING OPTION

# This option determines whether or not debugging messages are logged to the

# syslog facility.

# Values: 0=debugging off, 1=debugging on



debug=1



# COMMAND TIMEOUT

# This specifies the maximum number of seconds that the NRPE daemon will

# allow plugins to finish executing before killing them off.



command_timeout=60







# CONNECTION TIMEOUT

# This specifies the maximum number of seconds that the NRPE daemon will

# wait for a connection to be established before exiting. This is sometimes

# seen where a network problem stops the SSL being established even though

# all network sessions are connected. This causes the nrpe daemons to

# accumulate, eating system resources. Do not set this too low.



connection_timeout=300







# WEEK RANDOM SEED OPTION

# This directive allows you to use SSL even if your system does not have

# a /dev/random or /dev/urandom (on purpose or because the necessary patches

# were not applied). The random number generator will be seeded from a file

# which is either a file pointed to by the environment valiable $RANDFILE

# or $HOME/.rnd. If neither exists, the pseudo random number generator will

# be initialized and a warning will be issued.

# Values: 0=only seed from /dev/[u]random, 1=also seed from weak randomness



#allow_weak_random_seed=1







# INCLUDE CONFIG FILE

# This directive allows you to include definitions from an external config
file.



#include=<somefile.cfg>







# INCLUDE CONFIG DIRECTORY

# This directive allows you to include definitions from config files (with a

# .cfg extension) in one or more directories (with recursion).



#include_dir=<somedirectory>

#include_dir=<someotherdirectory>







# COMMAND DEFINITIONS

# Command definitions that this daemon will run.  Definitions

# are in the following format:

#

# command[<command_name>]=<command_line>

#

# When the daemon receives a request to return the results of <command_name>

# it will execute the command specified by the <command_line> argument.

#

# Unlike Nagios, the command line cannot contain macros - it must be

# typed exactly as it should be executed.

#

# Note: Any plugins that are used in the command lines must reside

# on the machine that this daemon is running on!  The examples below

# assume that you have plugins installed in a /usr/local/nagios/libexec

# directory.  Also note that you will have to modify the definitions below

# to match the argument format the plugins expect.  Remember, these are

# examples only!





# The following examples use hardcoded command arguments...



command[check_users]=/usr/local/nagios/libexec/check_users -w 5 -c 10

command[check_load]=/usr/local/nagios/libexec/check_load -w 15,10,5 -c
30,25,20

#command[check_hda1]=/usr/local/nagios/libexec/check_disk -w 20% -c 10% -p
/dev/hda1





##Disk Monitoring

command[check_root]=/usr/local/nagios/libexec/check_disk -w 15% -c 5% -p /

command[check_var]=/usr/local/nagios/libexec/check_disk -w 15% -c 5% -p /var

command[check_usr]=/usr/local/nagios/libexec/check_disk -w 10% -c 5% -p /usr

command[check_usr_sap]=/usr/local/nagios/libexec/check_disk -w 10% -c 5% -p
/usr/sap

command[check_oracle]=/usr/local/nagios/libexec/check_disk -w 10% -c 5% -p
/oracle

command[check_opt]=/usr/local/nagios/libexec/check_disk -w 10% -c 5% -p /opt

command[check_home]=/usr/local/nagios/libexec/check_disk -w 10% -c 5% -p
/home

command[check_stand]=/usr/local/nagios/libexec/check_disk -w 10% -c 5% -p
/stand

command[check_usr_sap_trans]=/usr/local/nagios/libexec/check_disk -w 10% -c
5% -p /usr/sap/trans

command[check_oracle_sapcheck]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p /oracle/ED2/sapcheck



command[check_oracle_sapbackup]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p /oracle/ED2/sapbackup

command[check_oracle_stage]=/usr/local/nagios/libexec/check_disk -w 10% -c
5% -p /oracle/stage

command[check_oracle_saptrace]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p /oracle/ED2/saptrace

command[check_oracle_sapreorg]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p /oracle/ED2/sapreorg

command[check_oracle_sapdata1]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p /oracle/ED2/sapdata1

command[check_oracle_sapdata2]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p /oracle/ED2/sapdata2

command[check_oracle_sapdata3]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p /oracle/ED2/sapdata3

command[check_oracle_sapdata4]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p /oracle/ED2/sapdata4

command[check_oracle_origlogA]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p /oracle/ED2/origlogA

command[check_oracle_origlogB]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p /oracle/ED2/origlogB

command[check_oracle_oraarch]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p  /oracle/ED2/oraarch

command[check_oracle_mirrlogA]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p  /oracle/ED2/mirrlogA

command[check_oracle_mirrlogB]=/usr/local/nagios/libexec/check_disk -w 10%
-c 5% -p  /oracle/ED2/mirrlogB

command[check_sapmnt]=/usr/local/nagios/libexec/check_disk -w 10% -c 5% -p
/sapmnt

command[check_sapmnt_ed2]=/usr/local/nagios/libexec/check_disk -w 10% -c 5%
-p  /sapmnt/ED2



command[check_procs_cron]=/usr/local/nagios/libexec/check_procs -c 1:1 -C
cron

command[check_procs_syslogd]=/usr/local/nagios/libexec/check_procs -c 1:1
-C syslogd



#command[check_mem_used]=/usr/local/nagios/libexec/check_memhpux -u -w 75
-c 90

command[check_zombie_procs]=/usr/local/nagios/libexec/check_procs -w 5 -c
10 -s Z





# The following examples allow user-supplied arguments and can

# only be used if the NRPE daemon was compiled with support for

# command arguments *AND* the dont_blame_nrpe directive in this

# config file is set to '1'.  This poses a potential security risk, so

# make sure you read the SECURITY file before doing this.



#command[check_users]=/usr/local/nagios/libexec/check_users -w $ARG1$ -c
$ARG2$

#command[check_load]=/usr/local/nagios/libexec/check_load -w $ARG1$ -c
$ARG2$

#command[check_procs]=/usr/local/nagios/libexec/check_procs -w $ARG1$ -c
$ARG2$ -s $ARG3$

#command[check_disk]=/usr/local/nagios/libexec/check_disk -w $ARG1$ -c
$ARG2$ -p $ARG3$

command[check_load]=/usr/local/nagios/libexec/check_load $ARG1$

command[check_disk]=/usr/local/nagios/libexec/check_disk $ARG1$

command[check_procs]=/usr/local/nagios/libexec/check_procs $ARG1$



command[check_cpu]=/usr/local/nagios/libexec/check_cpu_stats.sh $ARG1$

command[check_log]=/usr/local/nagios/libexec/check_log -F
/var/adm/syslog/syslog.log -O /usr/local/nagios/etc/syslog.log.old

-q error



command[check_swap]=/usr/local/nagios/libexec/check_swap $ARG1$

command[check_uptime]=/usr/local/nagios/libexec/check_uptime.sh

command[check_mem_used]=/usr/local/nagios/libexec/check_memhpux -u $ARG1$

command[check_mem]=/usr/local/nagios/libexec/check_mem_hpux_custom $ARG1$

command[check_iostat]=/usr/local/nagios/libexec/check_hp_iostat $ARG1$



On Mon, Feb 6, 2012 at 4:06 PM, Mark Elsen <mark.elsen at gmail.com> wrote:

> > Dear List,
> >
> >
> >
> > I am monitoring some HP-UX servers on which we have installed nrpe. It
> was
> > working fine until from last few days it started giving SSL handshake
> error.
> > I have checked nrpe.cfg and it is perfectly fine. The nrpe on HP-UX has
> been
> > started from commandline on the HP-UX servers.
> >
> >
> >
> > I have tried the following options from my NagiosXI server.
> >
> >
> >
> > [root at nagxi libexec]# ./check_nrpe -H x.x.x.x -c check_disk -a '-w 10%
> -c 5%
> > -p /home'
> >
> > CHECK_NRPE: Socket timeout after 10 seconds.
> >
> >
> >
> >
> >
> >
> >
> > [root at nagxi libexec]# ./check_nrpe -H x.x.x.x -t 90 -c check_disk -a
> '-w 10%
> > -c 5% -p /home'
> >
> > CHECK_NRPE: Error - Could not complete SSL handshake.
> >
> >
> >
> >
> >
> > [root at nagxi libexec]# ./check_nrpe -H x.x.x.x -n -c check_disk -a '-w
> 10% -c
> > 5% -p /home'
> >
> > CHECK_NRPE: Socket timeout after 10 seconds.
> >
> >
> >
> > [root at nagxi libexec]# ./check_nrpe -H x.x.x.x -n -t 20 -c check_disk -a
> '-w
> > 10% -c 5% -p /home'
> >
> > CHECK_NRPE: Socket timeout after 20 seconds.
> >
> >
> >
>
>   - Socket timeout means that the service is unreachable or down
> (agaIn)  ; Check
>
>
>                 # grep -i nrpe /var/adm/syslog.log   on HPUX
>
> M.
>
>
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>



-- 
Thanks
Manish Kumar
http://in.linkedin.com/in/manishkumar85
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