Daniel's Blog: Nagios - Use an external smtp server to send notifications. One of the most important feature of Nagios is the notification system; by default Nagios will use the local mail daemon (mail) to send all the notifications.Maybe this kind of system was working fine in past, but today, with this huge amount of spam circulating all over the world, this kind of emails from a not verified source can be filtered by the same company antispam system.In order to avoid this issue I will explain how to configure Nagios using an external smtp server also with smtp authentication.Since the Nagios notification event is still a triggered command, we have to download an alternative command line email client.
I suggest the powerful "sendemail" command, available at the following link: Once the download is finished unpack sendemail: [root@localhost] tar -xvf sendEmail-v1.56.tar.gz Then copy the binary in the bin folder. Check_email_delivery - Nagios Exchange. The check_email_delivery plugin uses the included plugins (or any other plugin you specify) to check on a complete email loop.
SMTP, IMAP plugins also work alone. The plugins support SSL and the check_imap_receive plugin can also verify the server certificate. Use the included utility imap_ssl_cert to download the server's SSL certificate into a file that can be used with the check_imap_receive --ssl-ca-file option. Sany's Linux and Open Source Blog. One of the beautiful feature in Nagios is notification interval. notification_interval directive is used to determine the interval at which notifications should be made while this escalation is valid.
If you specify a value of 0 for the interval, Nagios will send the first notification when this escalation definition is valid, but will then prevent any more problem notifications from being sent out for the host. If notification_interval is grater than 0 (Eg: notification_interval 10)Notifications are sent out for every 10 minutes until the host recovers. Sany's Linux and Open Source Blog. Notifications. Up To: Contents See Also: Escalations, Timeperiods, On-Call Rotations Introduction.
First notification delay - View topic. Until recently I would receive my first notification from Nagios within moments of a service being monitored going down.
Today I am finding that my first notification is being sent 5 minutes are the service goes down. Nothing has changed in the configuration in nagios that would account for the delay increasing to 5 mins. What do I need to check to determine why the delay jumped from 1 min to 5 mins? How to Install and Configure MRTG on Ubuntu Server. (20150902) – The steps and script in this post were amended to removing logging — iceflatline This post will describe how to install and configure Tobi Oetiker’s MRTG (Multi Router Traffic Grapher) on your Ubuntu server.
All steps assume that the Apache http server is installed and operating correctly. Once configured, you’ll be able to use MRTG to monitor the traffic in and out of your network using the SNMP capability in your network’s gateway\router. Sharmith's blog: How to Install and configure NAGIOS for monitoring CISCO device on FEDORA. Nagios is an open source free monitoring tool which is widely used by people to monitor their infrastructure devices and to create reports on the availability of the services.
This tool has the capability to alert the status of services or devices in realtime, based on your configuration on to a web based dashboard, email, sms etc……… Ethan Galstad created this wonderful monitoring tool and is currently supported by him and a group of developers actively maintaining the plugins for it which are official and unofficial. It is licensed under GNU version 2. Nagios has got the ability to monitor services, hosts and anything else which have the ability to send collected data via a network to specifically written plugins. Managing Plugins in Nagios XI. Nagios plugins. Description : Checks by snmp v1, v2c or v3 : - Memory and swap usage on Linux given by Net-snmp.
How To Install Nagios Core 4.1.1 In Ubuntu 15.10. About Nagios Nagios is an enterprise class, open source software that can be used for network and infrastructure monitoring.
Using Nagios, we can monitor servers, switches, applications and services etc. It alerts the System Administrator when something goes wrong and also alerts back when the issues have been rectified. Nagios plugins. ENVIROMUX Server Environment Monitoring System Nagios SNMP Plugin. How to install perl modules through CPAN on ubuntu hardy server. How to install perl modules through CPAN on ubuntu hardy server This assumes that you have grabbed a copy of the ubuntu hardy server cd from the ubuntu.com website. 1.
File Permissions - chmod. Linux has inherited from UNIX the concept of ownerships and permissions for files. This is basically because it was conceived as a networked system where different people would be using a variety of programs, files, etc. Obviously, there's a need to keep things organized and secure. We don't want an ordinary user using a program that could potentially trash the whole system. Lesson 7: Permissions. The Unix operating system (and likewise, Linux) differs from other computing environments in that it is not only a multitasking system but it is also a multi-user system as well. What exactly does this mean? It means that more than one user can be operating the computer at the same time. While your computer will only have one keyboard and monitor, it can still be used by more than one user. For example, if your computer is attached to a network, or the Internet, remote users can log in via telnet or ssh (secure shell) and operate the computer.
In fact, remote users can execute X applications and have the graphical output displayed on a remote computer. Setup External SMTP Server to Send Nagios Notifcation Alerts (CentOS) By default Nagios uses localhost to send email notification alerts to designated admins. You can of course setup DNS records to white list your Nagios IP/Hostname in order to prevent notifications being marked as spam. But it's a lot easier to setup up Nagios to use an external SMTP server. Unix - Sending email notifications from Nagios / Postfix. Configure Postfix to Use Gmail SMTP on Ubuntu - EasyEngine. Update: This article is part of WordPress-Nginx tutorials series. If you want to use a Gmail account as a free SMTP server on your Ubuntu-Linux server, you will find this article useful. This guide is tested with Ubuntu 12.04. If you face any issue, feel free to use comments-section below.
Daniel's Blog: Nagios - Use an external smtp server to send notifications. Exchange 2013 SMTP error "451 4.7.0 Temporary server error. Please try again later. PRX3" This error message seems to be caused by one of two different problems, unfortunately there is no documentation on what the error is supposed to mean and what the mysterious PRX codes at the end of the message should mean. This is what we found: A) It could be a conflict between two different Exchange receive connectors. Try these solutions If you previously defined a special POPcon receive connector in Exchange please REMOVE this connector. Email flow issue with following error in SMTP/MTA log: 451 4.7.0 Temporary server error. Please try (SW13958) Testing the setup. Monitoring Routers and Switches.
Check_snmp not present in libexec - View topic. Monitoring Routers and Switches. Nagios Not Running - View topic. How To Install Nagios Core 4.1.1 In Ubuntu 15.10. A Startup Guide to Setup Icinga2 on Ubuntu 15.04. How To Install NRPE on Ubuntu 14.04, 12.04 & LinuxMint. How To Install Nagios 4.1 In Ubuntu 15.04.