Nagios Support Forum

Hi Team

While trying to install nrpe plugin and running the command make all i am getting the following error. Kindly update on this. Thanks!!

cd ./src/; make ; cd ..
make[1]: Entering directory '/opt/nrpe-2.15/src'
gcc -g -O2 -I/usr/include/openssl -I/usr/include -DHAVE_CONFIG_H -I ../include -I ./../include -o nrpe ./nrpe.c ./utils.c ./acl.c -L/usr/lib/x86_64-linux-gnu -lssl -lcrypto -lnsl
In file included from ./nrpe.c:34:0:
./../include/dh.h: In function ‘get_dh512’:
./../include/dh.h:20:4: error: dereferencing pointer to incomplete type ‘DH {aka struct dh_st}’
dh->p=BN_bin2bn(dh512_p,sizeof(dh512_p),NULL);
^
./nrpe.c: In function ‘main’:
./nrpe.c:118:2: warning: implicit declaration of function ‘asprintf’ [-Wimplicit-function-declaration]
asprintf(&env_string,"NRPE_MULTILINESUPPORT=1");
^
./nrpe.c:204:3: warning: ignoring return value of ‘getcwd’, declared with attribute warn_unused_result [-Wunused-result]
getcwd(config_file,sizeof(config_file));
^
./nrpe.c:309:3: warning: ignoring return value of ‘chdir’, declared with attribute warn_unused_result [-Wunused-result]
chdir("/");
^
./nrpe.c:379:3: warning: ignoring return value of ‘chdir’, declared with attribute warn_unused_result [-Wunused-result]
chdir("/");
^
./nrpe.c: In function ‘my_system’:
./nrpe.c2: warning: ignoring return value of ‘pipe’, declared with attribute warn_unused_result [-Wunused-result]
pipe(fd);
^
./nrpe.c4: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(fd[1],buffer,strlen(buffer)+1);
^
./nrpe.c5: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(fd[1],buffer,bytes_read);
^
./nrpe.c: In function ‘write_pid_file’:
./nrpe.c3: warning: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Wunused-result]
write(fd,pbuf,strlen(pbuf));
^
./utils.c: In function ‘my_connect’:
./utils.c:151:10: warning: implicit declaration of function ‘my_create_socket’ [-Wimplicit-function-declaration]
sock = my_create_socket(ai, bind_address);
^
Makefile:39: recipe for target 'nrpe' failed
make[1]: *** [nrpe] Error 1
make[1]: Leaving directory '/opt/nrpe-2.15/src'

Regards,
Deepak.P

It looks like the SSL libraries might not be installed on your machine. What's the output of:

Thank you for your input eloyd. And siriideepak, please let us know if this resolves your issue.

Thank you!

Hi eloyd

Thanks for the reply it worked. But after installing i am getting the following error in nagiosxi client machine.

root@ip-172-16-1-108:/usr/local/nagios/libexec# ./check_nrpe -H localhost
connect to address 127.0.0.1 port 5666: Connection refused
connect to host localhost port 5666: Connection refusedroot

Regards,
Deepak.P

That looks like a firewall/iptables issue. Make sure port 5666 is open and allowed to connect from your Nagios host to your remote host.

Hi eloyd,

Iptables already in off on both nagios and client machines.

Regards,
Deepak.P

This next part is just a guess, because I'm too lazy to look, but can you check the following

Look at /etc/xinetd.d/nrpe

See if the "only_from" line includes your nagios server.

Run the following command and post your result:

cat /etc/xinetd.d/nrpe

Thank you!

Please find below results:
root@ip-172-16-1-108:~# cat /etc/xinetd.d/nrpe
# default: on
# description: NRPE (Nagios Remote Plugin Executor)
service nrpe
{
flags = REUSE
socket_type = stream
port = 5666
wait = no
user = nagios
group = nagios
server = /usr/local/nagios/bin/nrpe
server_args = -c /usr/local/nagios/etc/nrpe.cfg --inetd
log_on_failure += USERID
disable = no
only_from = 172.16.3.14
}
root@ip-172-16-1-108:~#

Edit the following line in /etc/xinetd.d/nrpe to read: Then execute these commands: And post your results.

Thank you!