Networks Are Made Of String

Networks, DevOps, InfoSec & Internet Freedom


My name is Gareth Llewellyn and besides assisting various other companies I build and manage Brass Horn Communications which is a Tor friendly ISP (AS28715) in the UK, which offers BSD shells, web hosting etc whilst operating the largest 'family' of Tor Exits in the UK. 99% of our servers and 100% of our routers are OpenBSD (we have a couple of CentOS/Fedora servers for Linux only software such as Docker). Most of our software is written in GoLang with a smattering of PHP and is all held together with ksh/bash shell scripts managed by Ansible.

Brass Horn Communications is the host for smaller projects/businesses such as Ablative.Hosting and PacketFlagon which are run solely by myself using the technologies above.

In the past I was the Head of Networks at I designed, deployed and maintained a network that spans 4 data centers in two countries comprising of Arista 7050/7048 switches, Cisco 6500s, ASRs and ASAs to support the DataSift platform. I also regularly worked with software such as nginx, apache, haproxy, Varnish, mySQL, Redis, Hadoop (HDFS & HBase), Zookeeper, kafka, zeroMQ and others on a variety of server hardware all managed by Chef in order to handle the workload of filtering, augmenting, delivering and storing multiple simultaneous real time data streams such as the Twitter, Facebook, Tumblr Sina & other social media firehoses to customers all over the world.

In my spare time I do a bit of programming, most of the Android apps I write are geared towards Network and Systems Administration. The projects page lists some of them and works in progress can be found at

My GPG keys can be found at

My Twitter account is @NetworkString

I don't do Facebook.