Naively Detecting Pivots with NetFlow
The experiment started with a simple question – can you detect interesting behaviour with only NetFlow data? There are numerous tools on the market that can do this will full network taps but that’s...
D/Line Radio Blog
Building an AM Transmitter with HackRF One
There’s something quaint and old fashioned about AM radio. The muffled drifting in an out as you drive down the road, the cacophany of noise attacking your ears attempting to listen at night and...
Building a (Very) Low Power FM Transmitter with HackRF One
Software defined radio has been a thing for a few years now but the sheer cost of equipment meant put transmission out of reach. There’s even a post on this very site from a...
Grabbing Your iRules by the TesTcl
Ok, I’ll admit, it’s hard to pass an opportunity to joke about a name such as TesTcl. Much like it’s namesake, it’s a serious issue. My current employer makes use of F5 load balancers....
Radio Station Mobile Apps – My Experience
It’s funny, I speak to developers and occasionally (jokingly!) get brushed off as an unknowing infrastructure support type. That’s despite writing code for over 20 years, a Computer Science degree that imprinted the “Gang...
The Frustrating World of Writing Radio Station Skills for Alexa
Writing a radio station skill for Alexa should be relatively simple. The minimal viable product is streaming audio plays when the user asks for it and maybe we can give some now playing information...
Polling Elasticsearch Queries through SNMP
We’ve got a technical problem that sounds simple to fix – what traffic levels are we seeing from a specific set of sources? This traffic passes through a firewall (Sonicwall) appliance and even as...
VXLAN Puppet Module
If you’ve done any work with OpenStack or VMware NSX, you’ve likely come across VXLAN. It’s an encapsulation protocol that allows you to wrap layer 2 traffic in unicast UDP packets for traversal over...
MPLS in a Full Mesh Core with Dual Homed CE Routers
We’re making a fairly substantial change to our core network in the New Year. It’s seeing us move from a flat, L3 routed network to an MPLS fabric. This option was chosen over VRF...
Single vs Multi Channel Architectures for WiFi
Almost every area of IT has its holy wars. Whether it’s processors and AMD vs Intel vs ARM, GPU with AMD vs NVidia or even operating systems with Linux, Windows and even BSD in...
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