oS 10.3: Using a mail-relay

English Network/Internet
1

At the moment I am working on openSUSE 10.3 box to get Nagios running.

Now I am done with my first very basic Nagios configuration which means that I passed the Nagios configurationtest without any warnings or errors.

Now I need to know, how I can use a mail-relay from my Linux-box.
The box is placed in a DMZ and has an IP of 192.168.0.5. The IP 192.168.0.4 holds a machine where a mailrelay is running that would accept mails from 192.168.0.5. Now my problem is that I do not have any idea what to do. Probably I need postfix or anything to forward?

Can someone help me please?
The idea is that Nagios is able to send mails by using the mailx-command and those mails should be forwarded to 192.168.0.4 which will manage the ongoing transport of the mail.

Thanks in advance!

2

You don’t need postfix for this. mailx can talk directly to a SMTP server if you set the smtp variable in the config file ~/.mailrc. See man mailx for the details.

3

Solved

Thanks a lot!

.mailrc:

set smtp=192.168.0.4
set from=please@no.mail

Works fine for me :slight_smile:

The only thing I had to do is to put please@no.mail on the white list of the relay-server.

So thanks again for solving this issue :slight_smile:

4

Sorry, I have to come back on this topic :slight_smile:

I tried to send mails via shell-command mailx/mail as root which works fine. But my nagios-installation does not send any mails.

I think I know that the reason is that the user nagios does not use root’s .mailrc. So what I did was to generate a home-dir for nagios (/home/nagios) where I stored the same file as I did it for root. But this seems not work.

FOOBAR:~ # ls -al /home/nagios/
total 12
...
-rw-r--r-- 1 nagios nagios   45 Oct 30 16:52 .mailrc

When I tried a su nagios, it does not work. I did not get an error, but the user is not switched:

Have a lot of fun...
FOOBAR:~ # su nagios
FOOBAR:~ # whoami
root
FOOBAR:~ #

So what is the trick to get the configuration that is stored in the .mailrc working for the nagios-user=?

5

Have a look here on some pointers on Nagios setup with openSUSE (based on openSUSE 11.0):
Installing Nagios on openSUSE 11.0

Much of the configuration is already there… you only need to setup some extra packages and set some settings through YaST.

Cheers,
Wj

6

Thanks - helped me lot :slight_smile:
Nagios is now working and able to drop mails :slight_smile:

7

Glad to hear it :wink:

Cheers,
Wj