Category: Systems admin and IT
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Netinstall for RouterOS in Virtualbox (on Mac OS)
I recently ‘bricked’ my Mikrotik HAP AC Lite router – the router didn’t have enough room on its flash memory to install an update, but – in an unexpected turn of events – tried to apply the firmware update anyway, and became un-bootable. Fortunately, Mikrotik supply a bit of software (‘Netinstall’) which is able to re-flash the devices using…
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Quick RouterOS script for hurricane electric 6to4 tunnel dynamic updating
If your ISP doesn’t offer IPv6 you may have set up an IPv6 6to4 tunnel using Hurricane Electric’s free ‘tunnelbroker.net‘ service. To operate the tunnel, tunnelbroker.net requires that you configure an IPv4 endpoint/client IP in their tunnel configuration. Additionally, the Mikrotik RouterOS ‘6to4’ tunnel interface requires this same IPv4 address is (redundantly) entered as the…
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Quota-based traffic usage alerts in LibreNMS
Out of the box, LibreNMS does not readily expose traffic transfer measurements – it is geared towards network operators who buy (and sell) transit bandwidth wholesale, and not really for the home-gamer who just wants to stay under their ISP’s data cap. As per the documentation, LibreNMS’ billing module can be enabled in config.php, and this will…
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Read the RFCs
I recently moved a bunch of websites over to a VPS (likely the one you are reading this from). It runs Ubuntu with a LEMP stack. I ran into some problems when I went to reconfigure my DNS Zones to reflect the change. The zones (combined) I created looked more-or-less like this: NAME TYPE VALUE…
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Raspberry Pi internet streaming radio station
My partner has been overseas for a few months and was desperately missing a local radio station. It doesn’t have an online stream that she can listen to and so she asked me whether I could record the station for ten hours – this just sounded like a hassle, so I set up an internet streaming…
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LibreNMS network monitor with Slack integration and Oxidized config versioning
I used to use Observium for network monitoring. After evaluating a couple of options – Cacti, Zabbix, Nagios – I found Observium, and loved its beautiful, well organised and extremely usable interface. Observium has two main drawbacks for me though: Like many FOSS products, it has a ‘community’ version and a ‘commercial’ version. Even though the commercial…
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Install Request Tracker 4 from source with lighttpd and postfix on Ubuntu 14.04
Request Tracker is a tried-and-tested ticketing system, written in Perl. The manual installation documentation is pretty clear but not tailored to any particular distribution or configuration and I still had to do a bit of digging around to complete the installation, so I am posting my notes in case they help others. Unpack the latest…
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ISP congestion monitoring with Raspberry Pi
The ISP I use at home is suffering from pretty bad congestion and the service has become barely usable during peak times. Despite multiple reports from other customers, they won’t admit that there is a problem, so it’s time to show them some data! I put together a really quick and hacky shell script that…
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Comments
Amazing instructions! I have spent half a day struggling to recover Mikrotik from failed firmware update until found these instructions.…
Thanks for posting! That worked on my 2007 Mazda3.