D/Line Radio Blog

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Logging Failure Reasons in FreeRADIUS

FreeRADIUS is an incredibly powerful RADIUS server and a tool I’m currently taking through a proof of concept as a possible replacement for Microsoft NPS. While the debug output of FreeRADIUS is fantastic in...

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Moving a Point-to-Point Microwave Link

At one station I volunteer for, we use a 1.5GHz microwave link to connect between the studio and the transmitter site on top of a hill nearby. Now I should stress that microwave link...

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Flipping Over to Your Competitor?!?

Weirdly, I had a problem I’ve not seen for years crop up recently. And it all started with complaints about car radios flipping between us and a competitor radio station. That’s not a good...

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LLDP, Voice and Port Security on Comware 7

Getting a practical deployment of 802.1x on the wired network running Comware 7 is something that’s been on my radar for a while now. Until recently, we had a working (for our system) configuration...

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Plotting for Improvement

It’s something a lot of community radio stations here in the UK are trying to improve – their FM coverage footprint. While the 25 watts ERP that Ofcom often licence stations at is usually...

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I’ll Take the High Road…

When does a URL not take you where you expect? Usually only when something’s wrong. However, I recently encountered a URL that would result in a browser taking a rather long path to the...

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Virtualizing the Campus Network

I’ll be the first to admit that I never really intended to be talking about in-depth networking topics when I started this blog a few years back. However, that’s been where a lot of...

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Some Experiments in OpenStack

As a little side project, I’ve been toying with OpenStack to replace ESXi on a couple of old servers I’ve got in a lab. Now that it’s up and running, I must say I’m...