Copying SSH host private keys between JUNOS devices to when replacing hardware

A certain customer of mine is (rightly or wrongly) pedantic about security warnings. Recently, we did a hardware replacement of a JUNOS device (an SRX240 firewall). While the config was a drop-in replacement, users who tried to SSH to the host post-migration would normally see an SSH “host key has changed” warning. In this environment, we wanted to eliminate this friction (and stop training our users to ignore security warnings), so we copied the following from the old device:

Monitoring OSX with Icinga / Nagios using NRPE

I have a fairly comprehensive Icinga monitoring platform monitoring my various linux hosts, but one area which has been lacking until now is the monitoring of the OSX Mavericks Mac Mini that I use for a home media center. Considering this is used by my family to watch TV/Movies, play music, and manage iPhoto, it’s arguably one of the most important hosts to monitor carefully. Of course, I could monitor its state (up or down) by pinging it from Icinga, but I wanted to know more than that. I’ve had issues in the past with running out of disk space on the host, and I’m all to familiar with the risks of 4-year-old hardware using spindled disks. This solution enables me to monitor the following on OSX with Icinga:

Pagination


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