Below are the steps to install the Nagios NRPE server on a Raspberry Pi. The configuration of the Nagios Server side are outside the scope of what we are trying to do here. This also assumes that you are running Raspbian on your Raspberry Pi. First, we’ll want to make…
Plex Media Server Not Starting on CentOS 6
Today I updated my Plex Media Server, but it wouldn't restart! I didn't see any errors on the command-line or in any of the logs. It was silently failing with no hints to the problem. I looked at the init script and tracked down how to manually attempt to start…
Configuring Roundcube Webmail for Multiple Domains
There are a lot of different ways to configure Roundcube Webmail to handle multiple domains. In an effort to have a similar experience to my legacy webmail system, I wanted Roundcube to have a drop-down list of domains/servers to login to. To enable this I set the following in /etc/roundcubemail/main.inc.php…
Configuring a Static IP for a Raspberry Pi running Raspbian
The recommend OS for the Raspberry Pi devices is typically Raspbian. By default a Raspbian install starts with the nework configured via DHCP. Raspbian is based on Debian, and does things a little differently than their cousins Fedora/RedHat. Instead of configuring resolv.conf directly, it needs to be included with the…
How to Parse DMARC Reports via IMAP
UPDATE : As of March 9, 2016, imap-dmarcts has been renamed to dmarcts-report-parser! We’ve also moved the code to GitHub to better facilitate contributions from our users! After my recent post about “How to Parse DMARC Reports“, I decided to find a way to directly query an IMAP folder to…
How to Parse DMARC Reports
UPDATE : As of March 9, 2016 I would recommend you instead use the more modern DMARC Report Parser. The current buzz in the e-mail industry, is around Domain-based Message Authentication, Reporting & Conformance, commonly referred to as: DMARC. DMARC pulls together SPF and DKIM, into a method to try…
DMARC Web Reporting Tool
After parsing your DMARC results, you will need an easy way to review the results. I’ve put together a VERY basic PHP script that can be used for display DMARC report results.
Deploy DKIM Milter for Multiple Domains on CentOS 5 with Sendmail
I decided that it was time to learn about DKIM and deploy on my servers. As a habit, I typically run CentOS 5 and Sendmail since it is the default MTA. To install the DKIM-milter, I would recommend using the packages provided by the “Extra Packages for Enterprise Linux (EPEL)“;…
Monitor Your Site on Google Safe Browsing with Nagios
Today a friend of mine had his site hacked, and when browsing to the site with Google Chrome it warned me that the site was infected with malicious code. Awhile back I provided an article regarding Monitor MythTV with Nagios. I figured I could write a Nagios check to see…
Trace a Call to an Extension on an Avaya Definity
It is sometimes difficult to figure out why a certain call is being call is being routed a certain way, or behaving unexpectedly. As a troubleshooting step, it can be helpful to peform call traces. To trace a call to extension 8383 list trace station 8383 Next you will want…