SIP-ing Through the Firewall
Here’s an odd puzzle for you. Fire up a SIP soft-phone and connect it to an external provider. Dial a number and you can make a call successfully. Doesn’t sound particularly unusual. Now fire...
Category: IT
Shared Nothing Hyper-V Infrastructure
The “standard” way to build a VM farm involves centralised storage, usually some form of SAN, with a number of compute nodes. The result is an infrastructure that looks something like this: I’ll admit...
WDS for Windows and Linux
Where I work is very much a Windows shop. Well, there’s also almost 2000 OS X laptops to worry about. However, most of the infrastructure we operate is built around Windows. Active Directory provides...
Calling in the Foreman
For what feels like a really long time now, configuration management systems such as Puppet have been the norm. Even in a small charity I do work for I’ve had it deployed for managing...
Patch Management in the Linux World
At one radio station I volunteer for, we’re mainly a Linux shop. Rivendell provide playout, Icecast streams the audio and it’s Debian on the desktop. With the small number of systems involved, keeping them...
It’s Getting Meta in My Router
Virtualisation has really taken over the world of IT. In the day job, I don’t buy new servers, I ask for a VM to be provisioned on an existing VM cluster. Even in the...
Protecting that Web Stream with QoS on Cisco ADSL Routers
If you’ve got a broadcast critical web stream to worry about, prioritising it ahead of all other web traffic is an important job. I’ve seen a number of approaches to it over the years. The...
Who’s using my bandwidth?
It’s one of those questions you often don’t think about until you start running into problems. You’re hitting the bandwidth limit of some link but not sure what to blame it on. The pretty...
OpenSIPs in the DMZ
You’ve got your brand new broadcast IP codec. A pair of them really, one inside the network and the other outside. How do you make them talk to each other? Admittedly, it could be...
IP for Serial Controlled Audio Switches
It’s not often you talk about systems from the DOS era, especially now that we’re in 2015. However, the DCS playout system used to be shipped with a serial controlled audio router. The router...
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