use external smtp server nagios alert.pdf

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Use external smtp server to send nagios alerts

April 18, 2012 ricoch3n Leave a comment Go to comments

By default Nagios uses localhost to send out email, this would be a problem if the nagios servers IP isnot designated to send emails. A quick solution is to use utilities that support sending emails throughexternal smtp server, heres a nice one:

http://caspian.dotconf.net/menu/Software/SendEmail/

Steps (Assuming Nagios version is 3):1) Download the zip file from http://caspian.dotconf.net/menu/Software/SendEmail/#download , unzipand copy sendEmail.pl to /usr/local/bin

2) Modify comm ands.c fg so the notif y-host-by-ema il and notify-service-by-email are similar to the

followings:define command{command_name notify-host-by-emailcommand_ li ne /u s r/bin/p rintf "%b" "***** Nagios *****\n\nNotification Type:$NOTIFICATIONTYPE$\nHost: $HOSTNAME$\nState: $HOSTSTATE$\nAddress: $HOSTADDRESS$\nInfo:$HOSTOUTPUT$\n\nDate/Time: $LONGDATETIME$\n" | /usr/local/bin/sendEmail -fnagios_notification@your_domain.com -s smtp.server.ip_or_hostname -u "** $NOTIFICATIONTYPE$Host Alert: $HOSTNAME$ is $HOSTSTATE$ **" -t $CONTACTEMAIL$}

define command{command_name notify-service-by-emailcommand_line /usr/bin/printf "%b " "***** Nagios *****\n\nNotification Type:$NOTIFICATIONTYPE$\n\nService: $ SERVICEDESC$\nHost: $HOSTALIAS$\nAddress:$HOSTADDRESS$\nState: $SERVICESTATE$\n\nDate/Time: $LONGDATETIME$\n\nAdditionalInfo:\n\n$SERVICEOUTPUT$" | /usr/local/bin/sendEmail -f nagios_notification@your_domain.com -ssmtp.server.ip_or_hostname -u "** $NOTIFICATIONTYPE$ Service Alert: $HOSTALIAS$/$SERVICEDESC$is $SERVICESTATE$ **" -t $CONTACTEMAIL$}

change nagios_notification@your_domain.com and smtp.server.ip_or_hostname to suit your need of course. Consult http://caspian.dotconf.net/menu/Software/SendEmail/#download for more command lineoptions if the smtp server requires authentication, for example.

3) Make sure the new configuration is syntax-error free:
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hi,m not having /var/log/sendEmail file . do i need to create dis.

ricoch3nJanuary 8, 2013 at 7:12 amReply

Please see my note #1, you only need to do this if you need to debug.

3.adarshJanuary 8, 2013 at 8:13 amReply

my %conf = (## General

programName => $0, ## The name of this programversion => 1.56, ## The version of this programauthorName => Brandon Zehm, ## Authors NameauthorEmail => [email protected], ## Authors Email Addresstimezone => +0000, ## We always use +0000 for the time zonehostname => changeme, ## Used in printmsg() for all output (is updated later in the script).debug => 0, ## Default debug levelerror => , ## Error messages will often be stored here

## Loggingstdout => 1,logging => 0, ## If this is true the printmsg function prints to the log filelogfile => , ## If this is specified (form the command line via -l) this file will be used for logging.

## Network server => localhost, ## Default SMTP server port => 25, ## Default portbindaddr => , ## Default local bind addressalarm => , ## Default timeout for connects and reads, this gets set from $opt{timeout}tls_client => 0, ## If TLS is supported by the client (us)tls_server => 0, ## If TLS is supported by the remote SMTP server

## Emaildelimiter => -MIME delimiter for sendEmail- ## MIME Delimiter . rand(1000000), ## Add some randomness to the delimiter Message-ID => rand(1000000) . -sendEmail, ## Message-ID for email header

);

This is my /var/log/sendmail.pl file. could you pls tell in detail that where do i need to edit.I m new to this.
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Thanks in advance.

ricoch3nJanuary 9, 2013 at 5:39 amReply

logging => 1, ## If this is true the printmsg function prints to the log filelogfile => /var/log/sendEmail, ## If this is specified (form the command line via -l) thisfile will be used for logging.

Make sure /var/log/sendEmail exists and its mode is set to 666(touch /var/log/sendEmail &&chmod 666 /var/log/sendEmail).

4. prashanthiMarch 14, 2013 at 1:08 pm

Reply

I have done the ablve the steps and able to run sendEmail. But even when i stopped nagios servicealso sendEmail is not giving any errors and it is able to send the mails.Please help me in understanding this.

ricoch3nMarch 16, 2013 at 12:22 pmReply

I dont understand what you meant by But even when i stopped nagios service alsosendEmail is not giving any errors and it is able to send the mails. Did you mean that after you shut down nagios, you are getting mail from sendEmail? If so, by what sender? Werethey real alerts generated by nagios before you shutdown nagios process? How did youshutdown nagios? Can you verify that its shutdown successfully? If sendMail is sending outemail, whats wrong with that? Did you enable logging?

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