Eero, where did you installed this nrpe package? is selinux running enforcing > mode (getenforce command), try disabling with setenforce 0. why you are > running it under xinetd as usual way is to run it as nrped daemon. > For NRPE I usually do a source install with these flags: ./configure make all make install-plugin make install-daemon make install-daemon-config make install-xinetd Rather than a yum install. If I install the nrpe package from yum I don't find a check_nrpe script on the system for some reason! I demonstrate this on another system than the ones I've been working with in this thread: [root at monitor1:~] #rpm -qa | grep nrpe | grep -v mcollective nrpe-2.15-2.el7.x86_64 [root at monitor1:~] #find / -name "check_nrpe" [root at monitor1:~] # So I'm more comfortable with a source install. test against with check_nrpe, not using telnet. > I actually solved the problem by adding the port to tcp instead of udp on the puppet host: firewall-cmd --permanent --add-port=5666/tcp Then from the monitoring host: [root at monitor1:~] #/usr/local/nagios/libexec/check_nrpe -H puppet.mydomain.com NRPE v2.15 So it's all good at this point. I'm not sure why the instructions I followed said to open up the port under UDP.. Had I just done what I did I would have saved a lot of trouble.. Thanks for the input guys!! I'm glad the problem is solved now. On Sun, May 3, 2015 at 7:31 PM, Eero Volotinen <eero.volotinen at iki.fi> wrote: > Tim, > > where did you installed this nrpe package? is selinux running enforcing > mode (getenforce command), try disabling with setenforce 0. why you are > running it under xinetd as usual way is to run it as nrped daemon. > > test against with check_nrpe, not using telnet. > > -- > Eero > > 2015-05-04 2:27 GMT+03:00 Stephen Harris <lists at spuddy.org>: > > > On Sun, May 03, 2015 at 07:23:19PM -0400, Tim Dunphy wrote: > > > [root at puppet:~] #telnet localhost 5666 > > > > This is using TCP > > > > > [root at monitor1:~] #nmap -p 5666 puppet.mydomain.com > > ... > > > 5666/tcp filtered nrpe > > > > This is using TCP > > > > > Back on the puppet host I verify that the port is open for UDP: > > > > So why are you opening a UDP port? > > > > -- > > > > rgds > > Stephen > > _______________________________________________ > > CentOS mailing list > > CentOS at centos.org > > http://lists.centos.org/mailman/listinfo/centos > > > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > -- GPG me!! gpg --keyserver pool.sks-keyservers.net --recv-keys F186197B