Hi all, first, here are my specs:
Debian (testing) with:
NRPE Plugin for Nagios 2.8.1
with a source compiled NRPE version 2.8.1 from the debian source package for compatibility.
I am not using SSL, or at least I don't think I am.
My problem is that I can run the following from the nagios host as the nagios user and get a return:
$ /usr/lib/nagios/plugins/check_nrpe -n -H rhle3 -c check_users
USERS OK - 1 users currently logged in |users=1;5;10;0
I ran the command using tcpdump and got a result:
# tcpdump -i eth0 host rhle3 and port 5666
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on eth0, link-type EN10MB (Ethernet), capture size 96 bytes
10:25:46.893631 IP 192.168.117.130.44632 > rhle3.nrpe: S 2247562885:2247562885(0) win 5840 <mss 1460,sackOK,timestamp 571949 0,nop,wscale 4>
10:25:46.902047 IP rhle3.nrpe > 192.168.117.130.44632: S 1757565253:1757565253(0) ack 2247562886 win 64240 <mss 1460>
10:25:46.902101 IP 192.168.117.130.44632 > rhle3.nrpe: . ack 1 win 5840
10:25:46.902480 IP 192.168.117.130.44632 > rhle3.nrpe: P 1:1037(1036) ack 1 win 5840
10:25:46.902678 IP rhle3.nrpe > 192.168.117.130.44632: . ack 1037 win 64240
So to me, all is well. I setup a couple of checks for the RedHat box but this is the error I get for all my plugins:
[blockquote]No output returned from plugin[/blockquote]
I ran tcpdump for an hour as above and got no traffic what so ever so it looks to me like nagios is not even trying to use nrpe.
Can you help? I did not post my config files to avoid a massive mail and because nagios doesn't seem to complain about them, but if you want them, I can send them.