Marc, The nagios users check_ping result is: PING OK - Packet loss = 0%, RTA = 0.07 ms The SELinux is not enabled because I installed ganglia monitor too. And there is no message like 'avc denied' in /var/log/message and the output of command audit2allow is blank. Thanks Daniel <div>On 3/2/06, Marc Powell <<a href="mailto:marc@ena.com">marc@ena.com</a>> wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Hmm. That's an unexpected result. The next step would be to go one level higher and execute nagios' check_ping as the nagios user -- /path/to/nagios/libexec/check_ping -H <a href="http://192.168.0.1">192.168.0.1 </a> -w 3000.0,80% -c 5000.0,100% -p 1 Do you have SELinux enabled? Have you modified the default policies? I'd look for 'avc denied' messages related to nagios in /var/log/messages just to be safe or, as root, run 'audit2allow -l -i /var/log/messages -v'. -- Marc Powell > -----Original Message----- > From: <a href="mailto:nagios-users-admin@lists.sourceforge.net">nagios-users-admin@lists.sourceforge.net</a> [mailto:<a href="mailto:nagios-users-"> nagios-users-</a> > <a href="mailto:admin@lists.sourceforge.net">admin@lists.sourceforge.net</a>] On Behalf Of Daniel Carvalho > Sent: Thursday, March 02, 2006 10:00 AM > To: <a href="mailto:nagios-users@lists.sourceforge.net"> nagios-users@lists.sourceforge.net</a> > Subject: Re: [Nagios-users] nagios check-host-alive always down {Disarmed} > {Fraud?} > > Hi Marc, > > The command /bin/ping -n -U -w 10 -c 1 <a href="http://192.168.0.1">192.168.0.1</a> is executable for user > nagios. I logged as nagios user and exec the command above and everythings > is OK. > > The nagios machine is running CentOS 4.0. I installed nagios via yum. > > Thanks > > Daniel > > > On 3/2/06, Marc Powell < <a href="mailto:marc@ena.com">marc@ena.com</a> <mailto:<a href="mailto:marc@ena.com">marc@ena.com </a>> > wrote: > > > > > -----Original Message----- > > From: <a href="mailto:nagios-users-admin@lists.sourceforge.net">nagios-users-admin@lists.sourceforge.net</a> <mailto: <a href="mailto:nagios-">nagios-</a> > <a href="mailto:users-admin@lists.sourceforge.net">users-admin@lists.sourceforge.net</a>> [mailto:<a href="mailto:nagios-users-">nagios-users-</a> > > <a href="mailto:admin@lists.sourceforge.net"> admin@lists.sourceforge.net</a>] On Behalf Of Daniel Carvalho > > Sent: Thursday, March 02, 2006 6:11 AM > > To: <a href="mailto:nagios-users@lists.sourceforge.net">nagios-users@lists.sourceforge.net </a> > > Subject: Re: [Nagios-users] nagios check-host-alive always down > {Disarmed} > > {Fraud?} > > > > Hello Marc, thanks for your answer. > > > > I'm sorry to reply to you too late. Here in my country we were on > holiday. > > > > The notification information is sent to an e-mail address that I > > especified on contacts.cfg. The web interface is not installed > yet. > > > > Find attached some cfg files and the notification alert. > > > > Thanks and best regards > > > > ***** Nagios ***** > > > > Notification Type: PROBLEM > > Host: bud01 > > State: DOWN > > Address: <a href="http://192.168.0.1"> 192.168.0.1</a> > > Info: /bin/ping -n -U -w 10 -c 1 <a href="http://192.168.0.1">192.168.0.1</a> > > It would appear that /bin/ping is not executable by the nagios user. > Try > running the command in the Info as the nagios user. In some > distributions, ping is only executable by root. You can modify that > by > giving /bin/ping suid permissions if it doesn't have them already -- > > # ls -al /bin/ping > -rwxr-xr-x 1 root root 27860 Sep 29 13:28 /bin/ping > > # chmod u+s /bin/ping > > # ls -al /bin/ping > -rwsr-xr-x 1 root root 27860 Sep 29 13:28 /bin/ping > > -- > Marc > > > ------------------------------------------------------- > This SF.Net email is sponsored by xPML, a groundbreaking scripting > language > that extends applications into web and mobile media. Attend the live > webcast > and join the prime developer group breaking into this new coding > territory! > <a href="http://sel.as-us.falkag.net/sel?cmdlnk&kid0944&bid$1720&dat1642">http://sel.as-us.falkag.net/sel?cmdlnk&kid0944&bid$1720&dat1642</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"> 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 xPML, a groundbreaking scripting language that extends applications into web and mobile media. Attend the live webcast and join the prime developer group breaking into this new coding territory! <a href="http://sel.as-us.falkag.net/sel?cmdlnk&kid0944&bid$1720&dat1642">http://sel.as-us.falkag.net/sel?cmdlnk&kid0944&bid$1720&dat1642 </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"> 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 </blockquote></div>