Hi Giorgio, I tried all the ways to fix the problem but still no luck. Do not know how to run the custom scripts, i will explain in detail here, please someone guide me here, Nagios server: Running the below command, this command will go to nagios client (172.16.17.18) and execute check_netstat script. The netstat script will check for port 80 listen status also if there are any TIME_WAIT connections happens, then it should alert us (WARNING - STATUS= TIME_WAIT port status on airlin | WARNING - STATUS=TIME_WAIT port status on airlin). For testing I made some connections happend to be listen on port 80 and as TIME_WAIT status. But it still reports as (OK, which means this is reporting incorrectly) [nagios@lnx-nagios ~]$ /usr/local/nagios/libexec/check_nrpe -H 172.16.17.18 -c check_netstat OK - The port is up and running NO established connections on airlin on Nagios client:, I executed below command here, and this reports exactly correct as there are some TIME_WAIT listening on port 80 [nagios@airlin nagios]$ netstat -an | grep 80 tcp 0 0 <a href="http://0.0.0.0:80">0.0.0.0:80</a> 0.0.0.0:* LISTEN tcp 0 0 <a href="http://172.16.17.18:80">172.16.17.18:80</a> <a href="http://10.10.19.85:2293">10.10.19.85:2293</a> TIME_WAIT [nagios@airlin nagios]$ /usr/local/nagios/libexec/check_netstat WARNING - STATUS= TIME_WAIT port status on airlin | WARNING - STATUS=TIME_WAIT port status on airlin. The same warning message should appear when I execute first command on nagios server but it reports incorrectly as (OK, no port status).... I am running above commands as nagios user because this as preivileges to run nrpe. the check_nrpe , nrpe , check_netstat owned by nagios:nagios on both the servers. in /etc/sudoers file I wrote below line on both the servers nagios ALL=/bin/netstat and [root@airlin libexec]# sudo -u nagios sudo -l Password: User nagios may run the following commands on this host: (root) /bin/netstat in the check_netstat script I wrote the netstat command as, netstat -an | grep 80 > synport12 should I add sudo here??? Please help your valuable suggestions...... thanks <div class="gmail_quote">On Thu, Apr 9, 2009 at 8:52 PM, Giorgio Zarrelli <<a href="mailto:giorgio@zarrelli.org">giorgio@zarrelli.org</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi As I told before, that netstat command won't work "out of the box", with an unprivileged user. Giorgio Marc Powell (<a href="mailto:marc@ena.com">marc@ena.com</a>) scritto: <div><div></div><div class="h5">> > > On Apr 9, 2009, at 8:26 AM, <a href="mailto:asam30@gmail.com">asam30@gmail.com</a> wrote: > > > Hi, > > > > I did copy the scipt to the remote host as check_netstat and used > > check_nrpe method to excute from nagios server. It looks when > > executing the command on remote server works well, > > > > [root@airlin libexec]# /usr/local/nagios/libexec/check_netstat > > WARNING - STATUS= TIME_WAIT port status on airlin | WARNING - > > STATUS=TIME_WAIT port status on airlin > > You're testing as root here. Test as the user nrpe runs as. It could > very well be a difference in privileges... > > -- > Marc > > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by: > High Quality Requirements in a Collaborative Environment. > Download a free trial of Rational Requirements Composer Now! > <a href="http://p.sf.net/sfu/www-ibm-com" target="_blank">http://p.sf.net/sfu/www-ibm-com</a> > _______________________________________________ > Nagios-users mailing list > <a href="mailto:Nagios-users@lists.sourceforge.net">Nagios-users@lists.sourceforge.net</a> > <a href="https://lists.sourceforge.net/lists/listinfo/nagios-users" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagios-users</a> > ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. > ::: Messages without supporting info will risk being sent to /dev/null > ------------------------------------------------------------------------------ This SF.net email is sponsored by: High Quality Requirements in a Collaborative Environment. Download a free trial of Rational Requirements Composer Now! <a href="http://p.sf.net/sfu/www-ibm-com" target="_blank">http://p.sf.net/sfu/www-ibm-com</a> _______________________________________________ Nagios-users mailing list <a href="mailto:Nagios-users@lists.sourceforge.net">Nagios-users@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/nagios-users" target="_blank">https://lists.sourceforge.net/lists/listinfo/nagios-users</a> ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null </div></div></blockquote></div> -- Shankar Asam