Hardening SSH on your Ubuntu Server

Secure Shell (SSH) is an amazing cryptographic network protocol, and it undoubtedly helps secure a huge slice of today's Internet - giving sysadmins robust remote access to their servers, but also so much much more. I've been using SSH on Linux Servers for longer than I can remember. Well, not quite. I do remember those "telnet" days when nobody had … Continue reading Hardening SSH on your Ubuntu Server

AusCERT2016 CTF – 10th Place!

I recently finished competing in the AusCERT2016 Capture the Flag (CTF) challenge which ran for 48 hours. Coming in 10th place from dozens of active participants was very rewarding! I entered under the team alias "InsertCoin"- partly to protect myself if I performed terribly(!) but also because I'm currently looking for new work opportunities - and the name subtly describes my current state-of-mind … Continue reading AusCERT2016 CTF – 10th Place!

Huntercoin node on Ubuntu 16.04

Following on from some recent research into Cryptocurrencies, I've been looking at the somewhat unique Huntercoin. It claims to be a so-called "human mine-able" cryptocurrency. I'm not so much interested at the moment in actually playing what I presume is some kind of online game for mining the coins, as I see there is a core … Continue reading Huntercoin node on Ubuntu 16.04

Building a Namecoin server with Ubuntu 16.04

In what has turned out to be an in-depth look at multiple cryptocurrencies recently, I've been having a deeper look into Namecoin. This research has meant having to spin up test virtual machines and since Ubuntu 16.04 is my server OS of choice (the 64-bit LTS server version) here's how I've setup a Namecoin node. Your results … Continue reading Building a Namecoin server with Ubuntu 16.04