Questions[nagios3](ubuntu)

I have installed nagios for monitoring and sendmail for sending mails. When testing from root account I am receiving mails, but I'm not receiving mails when I send it from nagios account. I have googled and found that only root user can send mails using sendmail MTA. How to enable sendmail to send mails from nagios account?

Note that I don't send messages directly from the local machine, but instead use my ISP/provider relay. The below logs show the error from the relay when the message comes from nagios@, but not when it comes from root@.

Output from nagios user:

1. cat /var/log/maillog

   Sep 19 15:52:32 ubuntubackup-chennai sendmail[6088]: q8JAMWXZ006088: from=nagios, size=237, class=0, nrcpts=1, msgid=<[email protected]>, relay=nagios@localhost
   Sep 19 15:52:32 ubuntubackup-chennai sendmail[6089]: q8JAMWCn006089: from=<[email protected]>, size=517, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
   Sep 19 15:52:32 ubuntubackup-chennai sendmail[6088]: q8JAMWXZ006088: to=karthick.murugadhas@****.com, ctladdr=nagios (496/492), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30237, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (q8JAMWCn006089 Message accepted for delivery)
   Sep 19 15:52:32 ubuntubackup-chennai sendmail[6091]: q8JAMWCn006089: to=<karthick.murugadhas@****.com>, ctladdr=<[email protected]> (496/492), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=120517, relay=smtp10.netcore.co.in. [202.162.229.32], dsn=4.7.1, stat=Deferred: 450 4.7.1 <nagios@****.com>: Sender address rejected: Please checked sender domain
   

Output from root user:

1. cat /var/log/maillog

   Sep 19 15:43:29 ubuntubackup-chennai sendmail[5158]: q8JADTt2005158: from=root, size=237, class=0, nrcpts=1, msgid=<[email protected]>, relay=root@localhost
   Sep 19 15:43:29 ubuntubackup-chennai sendmail[5159]: q8JADTFO005159: from=<[email protected]>, size=511, class=0, nrcpts=1, msgid=<[email protected]>, proto=ESMTP, daemon=MTA, relay=localhost.localdomain [127.0.0.1]
   Sep 19 15:43:29 ubuntubackup-chennai sendmail[5158]: q8JADTt2005158: to=karthick.murugadhas@****.com, ctladdr=root (0/0), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30237, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (q8JADTFO005159 Message accepted for delivery)
   Sep 19 15:43:30 ubuntubackup-chennai sendmail[5161]: q8JADTFO005159: to=<karthick.murugadhas@****.com>, ctladdr=<[email protected]> (0/0), delay=00:00:01, xdelay=00:00:01, mailer=relay, pri=120511, relay=smtp10.netcore.co.in. [202.162.229.32], dsn=2.0.0, stat=Sent (_SMR_smtp9.netcore.co.in Ok: queued as 29CE7F6D4C)
   

Update 1:

sendmail.mc configuration file is here.

I installed Nagios by following the steps here.

I wonder where will be config file are. I can see plenty of places files resides. For example I can see nagios.cfg in two places :

/usr/local/nagios/etc/nagios.cfg

and

/etc/nagios3

which I need to configure? And also there are two commands.cfg file :

/usr/local/nagios/etc/objects

and here :

/etc/nagios3/commands.cfg

I'm very much confused in configuring the files I need.

I have installed Nagios in my ec2 server. Now I want to install check_snmp plugin. I found that this is not available in :

/usr/local/nagios/libexec

I tried :

sudo apt-get install nagios-plugins-snmp

But I'm getting :

E: Unable to locate package nagios-plugins-snmp

How can I install the plugins?

Thanks in advance.

i have installed nagios and i want to install nrpe. While installing NRPE, when i execute (/home/abc/nrpe/configure)

./configure

it stops after reaching the following line

...

checking for type of socket size... size_t
checking for SSL headers... SSL headers found in /usr
checking for SSL libraries... configure: error: Cannot find ssl libraries

I have installed libssl-dev and openssl package as i found them as a solution for this error.

I tried the following option also

./configure --with-ssl=/usr/bin/openssl --with-ssl-lib=/usr/lib

But the error remains.

What can be the possible solution for this ? I am using ubuntu 12.04 as my operating system. Thanks in advance.

I need help to configure Nagios to send an Audio notifications for every errors that nagios detects on the network.

I've found on internet to realize that I need to install Festival but I don't know how to configure Nagios.

Is there some one who can hel me?

Nagios Core is 3.3.1.